Magnifying The World's Brightest Flashlight (200,000 Lumens)

[@TheActionLab]

Anyone who wants to try to magnify a source of light so that it is smaller than the source (without losing any light) with any combination of mirrors or lenses can use this simulator: phydemo.app/ray-optics/simulator/. But here is a reminder. All real sources of light emit light in at least 180 degrees. So in the simulator, you can't use a source that artificially emits in less than 180 degrees (you have to use point sources of light, you can line them up in a row to make a source that isn’t only one point). I made one setup with one LED bit.ly/3SawbxB and one with two LEDs bit.ly/3zQcjJJ. You can use the "detector" to see if you can get more light in one area than at the surface of either LED. Good luck!

[@Sotanaht01]

But you can't make a point smaller than a point, it's already a point. The whole... point of the exercise is to make a non-zero sized light source focused to a smaller size. Because the heat of any real light source is going to be dispersed over the source's area, it is possible (and in fact, trivial) to make a small focal area hotter than any single point on the source. You have less TOTAL heat energy, but can reach a higher temperature. The best you can do to approximate this in your simulation is to use multiple point light sources arranged on the surface of an object. Then your goal is to concentrate the beams from those multiple sources into a single spot with more beams than any 1 of those points can produce.

[@TheActionLab]

Line a bunch of point sources up in a row as the source.

[@unknownxy8026]

How about a parabolic mirror?

[@Lisa_Nicholas]

Arthur Eddington was the man.! I'd of like to have met him.

[@williamdouglas8040]

The light source is not continuous - it is an array of point sources. As such, one can redirect the light from these sources (the LED emitters) individually onto a single point. There will be lost energy for sure so we are not breaking the laws of thermodynamics. That single point will have a very high temperature due to the energy from multiple emitters overlapping at a single emitter sized point. Can you create a fixture that allows for enough small lenses to be arranged in a way to make this into reality? It would be easy to do with a CNC capable of cutting and polishing glass. But to do it by hand would require multiple individual lenses and some sort of mounting structure. Perhaps a 3D printed structure and off-the-shelf lenses?

[@Synclexia]

1:44 - So bright, it even convinced the rooster!

[@patricklaenen3468]

Holy 🐄

[@Half_Finis]

@@patricklaenen3468 stop commenting that dude xD 5th time

[@patricklaenen3468]

@@Half_Finisholy cow

[@td5786]

I swear I heard that exact sound hundreds of times before

[@marianoguy]

​@@td5786 'holy cow' or the rooster?

[@NigelMelanisticSmith]

1:21 a shot of the average lifted truck behind me on the highway

[@caulkins69]

You're not kidding. I sometimes find myself fantasizing about rigging some sort of light that pops up out of my trunk so I can retaliate against those guys.

[@laikon101]

🤣🤣🤣

[@zappyapp]

@@caulkins69 you can do that fairly easily, won't be legal tho

[@lavaphile399]

@@zappyapp Would it be a different case if he used a mirror to reflect their own light back on them?

[@GoldenBoy-et6of]

The average lifted truck and the average speeding degenerates car. They all use the same ridiculous headlights. The speeding types even have lights under their car that are ridiculously bright

[@friedec3622]

1:40 Rooster: It's morning?

[@RC_Engineering]

I came here for that

[@ςγτε]

🤣🤣

[@Avdlp]

😂😂

[@danieldavid3945]

Exactly my thoughts

[@laikon101]

🤣🤣🤣

[@boogrs55]

Vampires when they get blasted with 200k lumens

[@JDMLOVER86]

Who needs magic or garlic when you got science without reason

[@jshaw4757]

​@@JDMLOVER86Good point 😂...light is kinda magic too be fair though

[@BrayanCarmona-kr7vt]

Vampires aren't really afraid of the heat though only the light. So in theory a flashlight wouldn't really make them burn as many would think unless that flashlight was putting out over 1,000,000 lumens like the one the hacksmith youtuber built. It would be more or less a laser like object with inmense heat that could theoretically bring down vamps if they were real not the heat in itself but the intense light.

[@boogrs55]

@BrayanCarmona-kr7vt yes but up close will burn thru paper

[@TDLS-e6m]

So basicly what stroheim used in the anime Jojo bizarre adventures?​@@BrayanCarmona-kr7vt

[@OllieTheNobody]

How to become best friends with every moth in a 60 kilometre radius.

[@Khofax]

Until they land on it..

[@shashank8100]

good one😄

[@OllieTheNobody]

@@Khofax lol

[@OllieTheNobody]

@@shashank8100 thx

[@PaulTheadra]

New home defense option, death ray.

[@tchrapko]

No joke. I don't necessarily want a gun in the house but have considered keeping a mega flashlight and a bat handy instead.

[@freestalkerdotfr6391]

Call it the photon beam canon, it's way cooler and spote on

[@lowtech81]

@@tchrapko get e a LEP flashligt. Low lumen, Spacerocket Candlea numbers. Laser Excited Phosphor, gives the flashlight insane spotlight effekt and MILES in range. Not cheap, but 2500m range on some of them

[@TheDirtyChef]

​@@lowtech81 This flashlight isn't cheap either.

[@mokiloke]

I was considering this as soon as i saw it

[@1.4142]

How to annoy all astronomers in a 10 mile radius

[@nicodesmidt4034]

Why would they be astonomizing at night ? You clearly can’t see anything. Luckily there are these powerful flashlights 😂

[@patricklaenen3468]

Holy 🐄

[@monsoon1234567890]

And all astronauts in a 300 mile radius

[@nicodesmidt4034]

@@monsoon1234567890 astonomizing astronauts?

[@ethanmartinez808]

​@@nicodesmidt4034 bro what?

[@yessrodd]

This is the flashlight horror movie victims need

[@Yaivenov]

Victim: *clicks on flashlight in spooky place* Monster: *melts* 😂

[@m7mdzuhair9gamer61]

@@Yaivenovlol

[@ImShinTaRokGuoBaePress74]

This is for camping when u hear them footsteps outside

[@StrangeEleanor]

​@@Yaivenov Viewers' eyes: burn + flashbanged

[@lordprotector3367]

I've always wondered why they are so weak in horror movies. Even a £30 torch will show all the monsters and evil villains within a 100 yard radius.

[@CosmicBeing538]

Love this guy. Hope he never leaves The Action Lab. Such a joy watching his experiments and reactions. And he explains everything so well.

[@smarams]

you may can not magnify all the LEDs, but you may be able to redirect the light of each LED individually to the same spot, creating a huge, one LED-sized spot., effectively adding the power of all LEDs.

[@Matrixtruesaiyan]

That rooster got confused and at once he literally shouted, “IT’s MORNING!!!!” 😂 1:42

[@originalname9789]

its a sound effect

[@King-n00bi3]

@@walkashlandr/wooosh

[@MasterhpIke]

@@King-n00bi3 no woosh moment

[@Cobalt-Opera]

🤣🤣🤣

[@takikun1427]

"This is the world's brightest flashlight" *instantly flashbangs us*

[@furonwarrior]

My eyes: ⚪️👄⚪️

[@ilalebisap1]

*insert that one ash baby image*

[@takikun1427]

@@ilalebisap1 LMFAOO YEAH

[@themerovingian7154]

FRAG OUT!

[@ishowslow5044]

THINK FAST CHUCKLE NUTS

[@dielaughing73]

I read a funny Reddit post by a delivery driver who was having trouble finding the delivery address one night, so he called the recipient. The guy said "tell me when you see it" and turned on one of these bad boys (an earlier model). The driver was like "when I see _what,_ man - oh never mind I see it!"

[@Gefehhka]

Lmao

[@Pinkcircleguy]

yeah i think i read that in an r/quityourbullsh*it video, don't know why it's in there though

[@aaamogusthespiderever2566]

⁠@@Pinkcircleguyyea it never specified if the guy was close or not, he was likely in the neighborhood to see it (those flashlights really are powerful)

[@rasmusandersson4461]

Hahah, I think he said something like "Follow the beam" And the driver went "oh my god, I see it"

[@dielaughing73]

@@aaamogusthespiderever2566 I think he was a couple of blocks away. He'd found the neighbourhood but not the street

[@Mike23443]

I'd love to hold this in my car in case someone forgets to turn off their highbeams when approaching me.

[@isbestlizard]

heck yes imagine strobing it fast too so not even their pupils work right you could blidn them for minutes at a time ahahha

[@farbodmoradi7878]

@@isbestlizardand then they would crash into your ass

[@geometricaluranium1]

​@isbestlizard that's how you make car crash

[@geometricaluranium1]

​@@isbestlizardor giving them a seizure

[@jamesjackson4224]

I wouldn't be able to keep it charged if I used it for that 😂

[@BeamNGMania422]

0:44 old minecraft render distance

[@EpicBunty]

Bruh why is everything Minecraft for you kids get your head outta ur arse alr.

[@MUSICAL-Aaditya]

@@EpicBunty These are strangers and won't listen to you, looks like you're not used to the internet yet (also don't reply to this dude, they're just a troll who wants to waste your time)

[@hunterchichester5720]

​@@EpicBuntybro has not been on the internet enough.

[@dezzmotion4475]

​@@EpicBuntyWelcome to the internet. Also the time when minecraft players were all kids is long gone

[@Universeverse923]

@@EpicBuntybecause you poor cant buy real minecraft

[@gavins6419]

That poor table has been through so much fire.

[@lesliefranklin1870]

In case of fire, throw on wooden table.

[@Janet-zz9eo]

Yep… it’s been tough for the table all these years

[@neologicalgamer3437]

The rooster woke up lmao

[@Vile_Entity_3545]

It was inserted

[@patricklaenen3468]

Holy 🐄

[@MumboJumboZXC]

The power of editing

[@RosesOfSaturn]

Lolol

[@strategistaow3520]

I would too

[@timmy334]

I’m a fan of your videos because there is always a little bit of info that I never knew. I’m 44 and I learn something with each video. Never stop learning.

[@raven4k998]

this brings a whole new meaning to the saying playing with fire🤣🤣

[@jonp9654]

Wife " hon, kindly check what's happening outside, I hear some noise" Husband with the flashlight "hon, our neighbor's house is burning!!!"

[@KaitokiNohara]

Been asking in the comments for about a year to magnify the 100k lumen flashlight no one ever did I thought it be interesting. Thanks for doing this

[@WayneTheSeine]

That is an insane light. The amount of particulates in the air is stunning to see. I have experienced this with underwater fishing cameras. Most of these cameras have lights and IR lights that shine straight ahead. The reflecting and flaring off of particulate matter in the water column renders these cameras almost useless. The video looks like a snow storm or blizzard. However, I rigged mine up with a waterproof light that sits well above the camera and shoots down at a slight angle, preventing flare and you can see perfectly. It would likely stun us to know how many micro-grams of particles we breath in daily.

[@lordecircojeca2039]

New Styropyro questline started

[@fizixx]

For sure!

[@patricklaenen3468]

Holy 🐄

[@Very_Grumpy_Cat]

​@@patricklaenen3468 no no no. ✝️🐄

[@HyperVanilo]

@@Very_Grumpy_Cat Cross cow?

[@Very_Grumpy_Cat]

@@HyperVanilo exactly you got it

[@AlexFit-hl7xw]

1:44 The rooster thought it was morning)))

[@patricklaenen3468]

Holy 🐄

[@RealMasterChief117]

Are people really this stupid)))

[@Remotertx]

Yeah

[@yousefaljarrah6625]

thats a sound effect

[@Gimmickvr]

💀

[@studentdastanay7644]

1:44 - So bright, it even convinced the rooster!

[@PAULO-gv6he]

@1:44 the light even made the rooster sound lol

[@MarkWilliams-w8g]

Made the rooster sound ?. You mean crow. I can tell you weren't raised on a farm...

[@PAULO-gv6he]

@MarkWilliams-w8g that and English isn't my first language thank you very much.

[@edwarddavis7858]

"Give me your money!" [Turns this thing on] "Hu- HaaaAAAAAAAAAAAAAAAAAAaaaaaaaaaaaa.........."

[@John-Smith02]

I pictured the Nazi guy who drank the wrong chalice in Indiana Jones (Raiders of the Lost Ark) I think

[@WarshipMolester]

I pictured ash baby

[@Clay.140]

"The last crusade".​@John-Smith02

[@tretrefairman]

Here’s the comment I was looking for

[@Th0ughtf0rce]

The guy who had his face melted was from Raiders of the Lost Ark. The guy who drank from the wrong​ chalice in The Last Crusade turned into a skeleton. @John-Smith02

[@hudsonmaumill3552]

Shine this light in the worlds blackest room

[@Brevicaa]

Moo

[@damonedrington3453]

Well when you remember that said room is that way because it absorbs photons really well, and the flashlight puts out a LOT of photons- you can see the risk

[@zoulcar9403]

​@@damonedrington3453mmmmmmmmmmmm heat

[@amansuniverseyt]

*Yes*

[@skat1140]

@@damonedrington3453 The advancement of science is nevertheless worth the risk. I hereby authorize this experiment and take full responsibility for any subsequent consequences.

[@SHRBJHD]

In the army, we had these surefire mounted gun lights. It was called the Hellfire. Would burn your hand if you put it in front of the beam. But the coolest thing was when you put an IR filter on the end of the capsule. And put on NVG's. Could see for a half mile and no-one even knew you were there. You should get something like that for this flashlight.

[@MarkoDash]

a quick google and surefire wants 4.3 grand for one of those.

[@SHRBJHD]

@@MarkoDash Damn. Makes sense. It's a serious piece of kit. I'd love to see some videos made about that thing. You'll need to carry 12 radio batteries with you too. 6 to power it and 6 for back up.

[@Albtraum_TDDC]

@@SHRBJHD do you mean size D cells? Or the old 9v ones?

[@TRak598]

Surefire? The same company who manufactured the rare MGX LMG platform?

[@SHRBJHD]

@@TRak598 Nope. It's a different Surefire.

[@CStrolx]

So, it seems like there are lots of little lights in that flashlight and on top of that, the magnifying glass isn't right up close to each of those. I'm sure the curvature would be weird, but it seems like you should be able to direct the output from each LED to a single spot, making the heat more in that spot than any single LED is outputting. This should allow for heat to "increase". But, ... I'm no physics expert, so I'd be happy for someone to enlighten me if I'm wrong. (Please be nice).

[@culhacol]

The battery consumption in that flashlight must be crazy

[@unitedpigeons]

Somebody needed a tax write-off for a flashlight they wanted really bad. 😁

[@awemowe2830]

someone tried to order the worlds biggest fleshlight, but mistyped a few things and here we are... no clue how it happened twice though

[@Albtraum_TDDC]

@@awemowe2830 first time is an accident. Second time is a fetish.

[@PackEgg]

🐄 🐄 🐄 🐄

[@asocialconsciousness8535]

here's the thing.. that flash light wasn't one big light source but lots of tiny light sources. And while you couldn't shrink a light smaller than its original source you absolutely could focus all of the little light sources into one area the size of one single light source and that would have given you a higher temp and that laser beam effect you were looking for.

[@netscrooge]

I agree. Seems obvious to me.

[@transklutz]

But it's not a single lens. The rule works for a single lens.

[@asleepappeal]

​@@transklutzSo.

[@Milan_Openfeint]

@@transklutzConservation of etendue works for any combination of lens and mirrors. It's supposed to work even for lasers even if I don't understand why.

[@paulczerner3286]

@@Milan_Openfeint sequential combination of simple optical elements, ok. I'm talking about an optical surface custom designed (not necessarily rotationally symmetric) to complement the source radiation image. Ever hear of deconvolution?

[@mr.excidium8054]

7:54 "I used the stones to destroy the stones"

[@dragon_freeze2]

😂 😂 😂 😂 😂 😂 😂 😂 😂 😂 😂 😂

[@gn6691]

"It nearly killed me"

[@justaguy4311]

If you got a lot of these you could focus the light from multiple of them onto the same point By the same token, theres more than one LED in the flashlight. Of you used careful placement of lenses, you coulr make all the light from those LEDs pass through a smaller area Alternatively, you could use a lasing medium to convert the light via fluorescence or phosphorescence. You will lose energy, but it could perhpas focus the light into a smaller area A concave mirror might be able to help as well

[@mendovuls]

0:02 Jesus, I got flashbanged through my phone.

[@5ik358]

Exodus 20:7 and Deutoronomy 5:11 Thou shalt not take the name of the LORD thy God in vain; for the LORD will not hold him guiltless that taketh his name in vain.

[@O-V-HOE]

​@5ik358 technically he didn't take the lord's name in vain cause of the comma and he capitalized Jesus

[@coolgavin222]

bonus points if you watch with fullscreen (or in vr i guess)

[@evilprophetboy]

​@@5ik358they were actually trying to talk to jesus but didn't realize it was a public comment section

[@ВасилийКоровин-г9э]

0:50 Looks familiar... Isn't it the same parking lot where Veritassium tested night vision goggles? He is lucky to miss your test.

[@GuiDuckz]

Holy shit i think it is

[@MikotoJinba]

All these North American suburban parking lots are practically identical

[@ksmith8130]

There was an opportunity to have someone in the town when the flashlight was aimed at the town, and have that person record if they saw the flashlight.

[@smartestfactory]

I'm not sure you can assume sun-like temperatures for a source based on wavelength similarity. The rate of radiative heat transfer is based on the temperature of the source and the sink. I'd guess that the maximal temperature is either a) the junction temperature of the LED (~350K, too cold, paper ignites ~ 500 K) or b) an effective temperature based on the light output (math below). The energy of each photon emitted by the LED: E=hc/λ where h is Planck's constant (6.626×10−34), c is the speed of light (3E8 m/s), and λ is the primary wavelength of the emitted light. For an example λ=500 nm, E=3.976E-19 J. The effective source temperature could be estimated by equating the power of the emitted light to the radiative power of a black body at the source temperature, T_source. Using the Stefan-Boltzmann law for power radiated by a black body: P_light=σA(T_source^4−T_a^4) With an example power of the emitted light (P_light): 0.3 W, ambient temperature (T_a): 300 K, surface area of LED (A): 1E-4 m^2, and solving for T_source: T_source^4=(P_light/σA)+T_a^4 Substituting the example values, T_source ≈ 783.7K If true, it's no surprise that the LEDs can back-drive enough heat to melt themselves, since the effective temperature is 300-400 K above the junction temperature. You could measure the total energy flux by measuring how quickly the beam can heat a matte black target from Temp 1 to Temp 2 and estimate the source temperatures from that.

[@theegg-viator4707]

The smartest goose of all geese. 👍🏻

[@Tesla_Ampersand_Friends]

He is mixing up the color temperature of light and the thermal temperature of material objects. For instance, a heat lamp is 6000kelvin. To achieve the same amount of ouch ouch hot hot heat from the latter would require driving the source with tremendously more power than the former. Hopefully he understands this throws a hitch in his explanation of things. 6:13 6:21 7:04 7:36 Also RIP flashlight, but she didn't get anywhere near 5,726.85c or 10,340.33f LOL

[@RajveerSahay-jg9rb]

Bro waht? 🤯😱🤬😡🥵

[@Tolinar]

4:08 ah yes, one of the most readily observable reactions in science - The "OH SHIT" reaction

[@hulfe2514]

You're the first person I've seen NOT shine it in a city at night, not that I expected you would, but thank you.

[@theBoy_69_]

Next video he's gonna create a sun

[@johnshite4656]

That would be a fusion reactor. Yeah, we def need one of those.

[@patricklaenen3468]

Holy 🐄

[@NextLevelCode]

He’s Doc Ock now

[@tommyinsua4666]

Imalent's motto is "Tame the Sun" lol.

[@jubayerjubu4038]

spider man 2?

[@benmcreynolds8581]

Personally night hiking with my dogs in the Oregon woods became one of my favorite hobbies once I bought a powerful 18v Ryobi One+ flashlight with multiple rechargeable batteries. It's so bright, shines so far & has great battery life. That it makes hiking at night so fun! I can light up things multiple football fields away so the more i got used to exploring in the woods at night the more i learned that I can scan my surroundings as I walk and most of the time I can see if there's any critters around me due to how reflective their eye's are from my flashlight. This gives me a better understanding of my surroundings. Obviously it's not perfect so I also carry a airhorn on the side of my backpack, a telescopic baton in my pocket and a few helpful things in my backpack just in case. You never know so it's better to just have things with you and not have to use them compared to something unexpected happening and not having something on you. Regardless once you start getting more used to exploring the woods at night it actually becomes such a uniquely wonderful experience. You learn to become more in tune with your senses and your sense of direction and your overall perception as a whole.

[@scp-343_GOD]

How to heat something up hotter than it's source: make its point be smaller but use portals (if we ever make them) to gather the excess light and shine it back on

[@occupyallthethings]

6:05, Just to clarify, even if you didn't lose all that light, the projected light point could not be hotter than the source anyway right?

[@mattakudesu]

When he did the headlight comparison test, I literally squinted my eyes even though my phone didn't actually get any brighter. That thing is a photon monster.

[@AntonyRG1]

'wherever I shine it, a cockerel crows'

[@vicatoren3967]

Bro turned into a mythological figure after getting this flashlight

[@dawidekczerwinski]

It's almost as bright as Battlefield 3 flashlight

[@Shadow_banned_by_YouTube]

Still the best Battlefield along with 4

[@Dell-ol6hb]

@@Shadow_banned_by_KZbin true

[@arthurpiers1908]

Salute to you bro 😂🫡

[@viktorianas]

BF4 is just a derivative of BF3, yet BF3 was a revolutionary improvement over previous BF.

[@RazorPhoenix7]

that game came out in 2011, feeling old rn

[@lindametzler8740]

Easy way to destroy homework😏

[@clothlinggaming8637]

my flashlight ate my homework

[@winter4498]

My action lab host ate my homework

[@kenzheng701]

Teacher my flashlight burnt my homework

[@sssbznzn]

Conservation of entendue Fiber optic cable :- hold my beer

[@leadboots72]

Action Lab:"You can't break the laws of thermodynamics. " Styropyro: " Hold my laser pointer!"

[@neur0ness]

Cool experiment. How about putting a conical tube made of mirrors or reflective material on the flashlight? Then putting a magnifying lens on the small hole at the end?

[@JonDoe-uq1mk]

The LEDs would burn like at 7:44

[@dwaneanderson8039]

What you really need to do is put a separate lens on each LED and focus each of them on the same point. That way, you can get a point as small as a single LED, but with the energy of all of them combined.

[@whatusernameis5295]

you would lose some energy into the mirrors

[@maxpayne2574]

@@dwaneanderson8039 I think the light coming out of the small lenses would still scatter.

[@dzxtricks]

Yes, fresnel that's what we need ​@@dwaneanderson8039

[@ThomasBolger973]

The issue with you bringing up the conservation of Etendue in this context is that you're treating "the flashlight" as "the source" of light. There are 32 LEDs which are individual light sources. The way to magnify this would be to take the lens off the end and create an array of optics to redirect each LED inward toward a predetermined focal distance. You could get an area the size of one LED to have 32 times the the energy of just putting something on the flashlight. More, actually, since the area between the LEDs counts as area on which the energy is being spread across.

[@netscrooge]

Yes, the concept was being applied in a simplistic manner.

[@simontillson482]

Yeah, I thought that too. Like how we combine multiple laser beams to make a powerful cutting tool. It won’t increase the maximum temperature, but it’ll sure increase the energy density you can put into that focus!

[@juliavixen176]

The focal point can't get hotter than the light sources, because if it could, it would be heating up the light sources... because the lenses are symmetric.

[@Spoco]

One might as well take this deeper: why would the light emitting diode, an entire semiconductor device, be "the source" of light? A photon is emitted when an electron falls into a "hole" in the electron shell of just one atom in the p-type semiconductor material.

[@kevinpiala6258]

@@juliavixen176 You repeated this a few times here, and going over it I don't see how it follows. The Lenses arent *mirrors*, nor does the target perfectly reflect the light back, additionally the source light isnt being emitted because of black body radiation, but through another process. Wouldn't these two aspects both have to be true for your argument to hold?

[@austinju-y4h]

Yes please do delete me. Existence is pain enough2:29

[@ktulu19841]

Everytime I hear you talk, I get reminded of the old Honeybadger Don't Care video. Was that you narrating that video? Awesome flashlight!

[@DonnyHooterHoot]

$749.00! It should cook the Moon for that price! Great video!

[@jeremiahbullfrog9288]

When you need this device, that's actually pretty cheap.

[@All_SportGG]

Yeah this is very cheap considering how much power it puts out.

[@patricklaenen3468]

Holy 🐄

[@DonnyHooterHoot]

@@jeremiahbullfrog9288 Nope!

[@jeremiahbullfrog9288]

@@DonnyHooterHoot i guess you don't need it then

[@mathewmclean9128]

That's hilarious! "It's time to wake up" and then as soon as you turn on the flashlight, a rooster immediately wakes up.

[@Redh4x_real]

It's an edit lol

[@Potatoincanada201]

5:12 but isn’t the LED just a glass cover of the actual light source?

[@DixieDee]

I think I just found my new defense device lol. Imagine an intruder getting in at 2am...

[@Icebuild777]

3:34 love the marimba music

[@Shino_666]

1:41 dayum, even the rooster thought it was morning already. XD

[@elwhagen]

4:03 Oh, a paper that gets really hot actually starts burning?!?! I'm as surprised as you! 🤣😆🤣 BTW, love the quote from Arthur Eddington!

[@Lreclusa]

"It was a pleasure to burn. It was a special pleasure to see things eaten, to see things blackened and changed. With the brass nozzle in his fists, with this great python spitting its venomous kerosene upon the world, the blood pounded in his head, and his hands were the hands of some amazing conductor playing all the symphonies of blazing and burning to bring down the tatters and charcoal ruins of history. With his symbolic helmet numbered 451 on his stolid head, and his eyes all orange flame with the thought of what came next, he flicked the igniter and the house jumped up in a gorging fire that burned the evening sky red and yellow and black. He strode in a swarm of fireflies. He wanted above all, like the old joke, to shove a marshmallow on a stick in the furnace, while the flapping pigeon-winged books died on the porch and lawn of the house. While the books went up in sparkling whirls and blew away on a wind turned dark with burning."

[@variouselite]

not to suggest that this technique would break the etendue thing, but in terms of achieving the hottest point from a light source I would think that if you arrange the source -> collimating lens -> focusing lens -> target, would get the most energy of the source onto the smallest point.

[@patricklaenen3468]

Holy 🐄

[@Petriedish02]

Not an expert or anything, but I think this runs into the exact same issue. "Collimating lens" is doing a lot of lifting in this and ultimately while it could theoretically perfectly collimate light from a point source, my guess is it would be imperfect on any other point of the light source (i.e. you'd lose some of the light from imperfectly collimating the other LEDs or even other points on the same LED). Then when focusing this on the other end you'd receive this imperfect collimation at the focusing lens and the same issues addressed in the video arise. This setup might be able to reduce how quickly the energy falloff happens as you move further away, but inevitably thermodynamics arrives to spoil the fun.

[@SwissPGO]

Trust me, you can't... I worked on particle accelerators, x-ray lasers and designed synchrotron beamlines costing multiple million euros: you can't focus such a big amount of leds putting out light in all directions on a spot as small as the source itself. It's different with lasers - I worked with later beams about 30 cm diameter that could be focused on a few micrometer target, but that's because it's a laser where all photons have very parallel rays, but even then, a lot of the electrical energy of to make such lasers work won't arrive on the target. And these were multi-terrawatt lasers that create plama's hotter than the sun.

[@wh44]

@@SwissPGO "leds putting out light in all directions" - that's the thing, it isn't in all directions: they've already been aligned (collimated) at the LEDs themselves. You can even see it in this video - that the focused circle getting burnt is smaller than the circle of the source - I think all those LEDs shining in the same direction are acting a bit like a smaller circle further away. As a thought experiment to show what I'm talking about: you could give each individual LED its own set of lenses to focus its light on a spot the size of a single LED and it would not violate Conservation of Etendue.

[@SwissPGO]

Led light is non-coherent, at the production, it is électroluminescence and the light is emitted into all directions: each photon emitted has no clue where the other photons went, an will be reflected and guided by a lens into a main direction, but the light will spread out quickly in a divergent non-coherent beam that is inefficient to focus. A laser is a whole different process of light emission: everything aligns, which makes focusing possible up to the diffraction limit very efficient. It may be that the flashlight in question uses diode lasers (yes, that's also a thing)... but a laser is monochromatic, and to obtain white light, a fluorescence step is typically used which breaks the coherence and increases the divergence, so you end up with the same situation. And... even if each led would be able to produce a perfectly coherent beam, aligning all of them is very difficult, especially since the temperature of the device is not stable. Part of my phd research involved the aligning of multiple laser beams on a target, and this happened using lower powered helper beams and constant measuring and correction to adapt to temperature variations. You can't have that in a flashlight because nobody is willing to pay a million for a flashlight that has the size of a tank.

[@jayuk8]

You will need to focus the light into a point to achieve a greter temperature, a bit like a make shift laser i guess Some type of ultra reflective cone to direct the light rays into a smaller point and out the end Look at what we can do with fibre optics that might give you a good idea for developing a concept

[@BloodyMobile]

I am STILL impressed by the fact that we reached the point where we casually overclock LEDs to the point where they need ACTIVE cooling in order to not melt themselves. The only time I ever saw LEDs in need of "cooling" was when I happened to hold one during DIY projects and accidentally burned it out by over-volting it. Other than that, they NEVER got even slightly warm. And now we got THESE things, which could double as handwarmers xD

[@wildyato3737]

2:00 Use Red filter on the magnifier lens.. I called this *Hellish Light* Where you can burn all things through contact😁😁

[@johnshite4656]

Imagine how confused the animals would be, turning this thing on and off during a total solar eclipse.

[@DrDeuteron]

If were at a total and someone whipped this out, there would be blood.

[@patricklaenen3468]

Holy 🐄

[@BishopGantry]

Does it come with a strobe setting?

[@ratiemand4529]

@@BishopGantry Yes it does! (I own the flashlight myself)

[@patricklaenen3468]

@@ratiemand4529holy cow

[@EntropiaBones]

Whenever the light is on the table , I can't stop thinking of what is happening on the ceiling.

[@juliavixen176]

Past the focal length of the lens, the light rays diverge. The ceiling actually gets more concentrated light _without_ that lens than with that lens on the flashlight.

[@sebastianmichaelis6640]

Maybe get some of the 99.9 reflective foil and make it a cone shape?

[@jcreedy20]

One of those xhp70.2 chips is around 30w! It has 32 of them! Thats close to 900 watts of input power. No wonder it needs a fan! My 1200w led DIY jobby needed a fan as it started to burn my hand after 30 seconds.

[@GetMoGaming]

@1:27 are the headlights on high beam? Because full beam won't reach your eyes with full intensity; it's designed not to blind other drivers. You can adjust the height or just use high beam (fog lights) which are designed to light up everything in front of the car with full intensity. You prob know this, but just thought I'd say.

[@4fr0pl]

I feel like this man erased my memory in 0:02

[@aleksandarsimic4745]

I was about to say that😂

[@theredknight3736]

Yeah i know right? I now feel only human...

[@maritoguionyo]

What was I doing?

[@blackbeast9057]

3:48 funniest part of the video for me. 😂

[@Theguy-ly8dx]

1:43 bc the rooster thought it was day😂

[@jeremypermen1702]

That quote by Arthur Eddington is definitely my new favorite

[@FreakyGojo-x6r]

robber comes to his house him pulls that out robber:BLINDED

[@gcewing]

Nitpick: You're not "magnifying" the light, you're concentrating it.

[@skat1140]

I forget, are they called magnifying lenses or concentrating lenses?

[@gcewing]

@@skat1140 It depends on how the lens is being used. The term "magnifying lens" means the lens is being used to make an image appear larger. That's not what's being done here. In this application it would be called a focusing lens.

[@lukkkasz323]

​@@gcewingnitpick: concetration magnifies the power of the light

[@andyghkfilm2287]

@@gcewing if only the light were “appearing larger” when it went through this lens

[@illikkal]

Concave and convex

[@gcewing]

0:37 Every astronomer in the country: "STOP THAT!"

[@EpicBunty]

Does it really affect them

[@kartikay12]

​@@EpicBuntyyep! It's called light pollution. It affects the light shining from the distant celestial entities.

[@TheJackInTheBox916]

0:26 uhh 18x2 = 36

[@YussifNawaf]

Ikr he's kinda awkward

[@Universeverse923]

100000 x 2 = 200000

[@Universeverse923]

32/2 = 16

[@isaiaholodj]

16 thingys in smaller one, 32 in bigger one. 16 * 2 = 32, ya idiot

[@shfuioy2586]

This is low key hilarious (this thread I mean)

[@ens8502]

Finally the frontlight for my bike Ive been waiting for

[@LincolnBlake-r4m]

You better have on sunglasses 1:33

[@swazs6092]

You're waking up the plants with that bright Flashlight! let them sleep lol

[@thealbinogamer]

Even the rooster was fooled 😂😂

[@raven4k998]

imagine putting those on your car and causing accidents muhahahahahahaha😂😂

[@3D_Printing]

3:40 no impact on your fingers

[@thepotatoportal69]

I think it's because they weren't directly under the focal point

[@3D_Printing]

@@thepotatoportal69 good, don't want burnt fingers

[@Temoontop]

Worlds largest flashlight feats: Can burn a paper 200,000 lumens Can show a whole mountain in the dark Provides a 1000-meter illumination range in the dark. Egg feats: Good taste Natural packing Hard af shell Common breakfast High protein Smooth texture Key ingredient for lots of food Affordable One of the most used ingredients Low carb I think egg is a sign of immortality (because of shells) 10+ versions of eggs Super strength (because of shells) Speed and agility (They can be cooked in mere minutes) Skill/usefulness (Can be used for breakfast, lunch and dinner Immunity to Stress Mind-Control Powers (Don’t say cake tastes like eggs) Shape-shifting (scrambled, boiled and more Incredible Resilience Eggshell Durability Eggshell Weaponry (broken shell can be sharp) Time for battle Strength: Egg (shell is by far sharp, and does more damage than the light) Speed: Flashlight (Power of light) Durability: Egg (Shell) Agility Flashlight (Flashlight is just more agile ) Endurance: Egg (Can take the bite and elbow power of a muscular man) Stamina: Egg (Survival in extreme temperatures) Skill: Egg (The egg yolk just goes out so skillfully Winner: Egg (Low-Mid diff) Pls like this took me ages

[@itsamemario8014]

Glad to see that you needed a 3 2 1 to turn on a flashlight.

[@ChainsawFPV]

That's not a flashlight, that's a weapon. Lol

[@Felipe-sw8wp]

exaclty lol, just pointing it at someone is unsafe

[@Portal2Fan1234]

True,best way to defend against burglars or bad people

[@ChainsawFPV]

@@Portal2Fan1234 Agreed. And with keeping a good distance for your own safety. That light would stop anyone.

[@CrystalWolf4]

​@@Felipe-sw8wp I accidentally pointed my MS18 (the version before MS32) & it destroyed my eyes temporarily. Luckily it was only less than a second & I quickly shut it off. Any longer & it would've blinded me. I shined it towards a neighbors house who was harrassing us & he called the sheriff.. Litlle did he know... I also knew the sheriff's who arrived 😂 They didn't do anything but harrass an old friend about his expired registration. They let him off because I was with them lol They could have easily got us all in deep water because there was a shoot out prior. But they were chill still.

[@Felipe-sw8wp]

@@CrystalWolf4 looool nice use of this "gun". Glad your eyes are ok!

[@monte1224]

1:08 neighbors: BRO I AM JUST TRYING TO SPEEP

[@IsaacsWorld-eo9fg]

Lol 😂

[@frankmacleod2565]

7:18 excellent graphic illustrating this principle.

[@josephpacchetti5997]

200,000 Lumens, a bit hard to believe, I bought a tactical flashlight a couple years ago that claimed 10,000 Lumens, I think It's about 6,000, then a few months later the same flashlight was claiming 20,000 Lumens, I'm not saying you are wrong, and I'm subbed to your channel. THX 🇺🇸

[@christianignasiak9699]

What's your thoughts on the XHP160-A8-GR? Supposedly 1,800,000 high lumens

[@squallneko]

I just instantly thought of how useful this flashlight will be in scary games where they give you those tiny flashlight that only shines 10% of the screen.

[@okplay9446]

This looks super unsafe... Can't believe he's willing to put his hand that close to the focus

[@patricklaenen3468]

Holy 🐄

[@lumntoob999]

He has white skin so it will reflect more light than the darker objects he put in front of it. I can light paper on fire with my flashlights but I don’t think any of my lights will set fire to white computer paper even when I set the paper all the way against the lens, maybe if I left it for a longer time but I don’t want to burn up my leds either. Also if I put my skin (also white) all the way up to the lens I can easily burn myself but it’s safe a few inches away for a short time.

[@HyperHrishiHD]

​@@lumntoob999 That make sense. So black people would get more easily burned in this scenario.

[@empathogen75]

I think he’d feel the heat before he got close enough to get badly burned.

[@European-Man-88]

@@lumntoob999So u finna say dat light be raysis?? Sheeeeiiiiiiiii mayn

[@Cuteeditsbyme]

THATS BRIGHT

[@saroar.]

REALLY BRIGHT

[@DW-indeed]

HOLY COW

[@borisbahleda2989]

Just a little

[@jonorgames6596]

You're RIGHT!

[@nicodesmidt4034]

@@jonorgames6596that’s bright 😂

[@vecaaa]

bro: this 100 dollar bill is burning a hole through my wallet the wallet in question: 3:55

[@EinTypOhneHandle]

Every The Action Lab video feels like a dissatisfying sneeze to me. It starts out great and you get a good feeling, but before reaching the peak, it just suddenly stops, leaving you wanting more.

[@370Location]

I recall playing with non-imaging optical concentrators decades ago. One example is a cone of highly reflective material and a critical angle that causes repeated reflections into the tip with a small exit pupil. A sheet of mylar rolled into a cone in sunlight will instantly melt the tip. Aluminum foil with the shiny side in should get to extreme temps at the exit tip. I believe they were proposed for gathering solar power in orbit. [edited non-optical to non-imaging optical - Oops!]

[@prakharsinha7950]

You would never get scared with this one in the dark....😂

[@N0Xa880iUL]

I love that quote at the end 😂

[@MichaelKire]

Imagine that thing on a police car on a swivel mount. Talk about getting spotted

[@DrDeuteron]

or on a ghetto bird.

This is so interesting, thank you for the explanations :)

[@majormarketing6552]

Fracture, magnify, and recapture is how you get it smaller and hotter