where are we actually getting UV exposure?

[@rogue-taxidermy_griffin]

"I'm not a real Scientist, I'm a scientish at best" instant classic, merch when

[@dantemoose420]

no but for real. i'd ruin my monthly budget for that shirt

[@Treatsandthreadscom]

SOO good

[@josi_k.]

Valid quote, Valid question.

[@ShovelChef]

Or just the word "Scientish" in typewriter font. I'd get that on a shirt AND a hat.

[@gerrits_machinations]

Hi professional materials science chemist with a photo chemistry background here that second test sent me into a fun rabbit hole of photo chemistry papers only to realize the answer was literally on the box of the cards and not actually chemistry. The glue they use to hold the colour changing materiel in place melts at about 25 degrees above room temperature and when it melts the dosimeter stops working because if light no hit colour change thing colour no change which turns out is why the box says "keep dosimeter at room temperature". so uhhh yeah turns out the extra padding paper in the box is actually instructions that contain useful information. who knew certainly not me so If I had to guess bright lights still make things hot and after a hot second (heyyyy incidental pun) under the light it got warm and the dosimeter stopped working like the instructions I discarded and had to find a pdf online of said it would.

[@oddbirdMusic]

Thank you! useful data.

[@mopanda81]

long story short a 10 cent sticker is not a replacement for a device you're going to leave in a hot shiny environment

[@rambosimpson]

Thank you for not only seeking out the research but explaining it really simply ❤

[@sir9integra9jr]

I’m a biochemist and i want to say thank you for “don’t panic” being step one of your experiment. I’m stealing that to tell to every undergrad i work with for the rest of time

[@SparrowNoire]

The Danny DeVito chair pillow jump scare was an unexpected but pleasant surprise!

[@davidsteiner3909]

UVC gets absorbed by oxygen, which builds ozone. That's why you won't get a lot of UVC exposure outside. Spectrometers are available for cheap. If you're interested in the physics of sunlight, there are wavelength intensitity charts available, which show what kind of color light (wavelength) and how much of it (intensity) arrives at different levels above seawater.

[@BadNaturalist]

You intrigue me with that sea level aspect! i live in driving distance of sea, below sea and mountain 🤔

[@babybirdhome]

Fun fact - hospitals use UVC light sources to create ozone intentionally to keep the facilities disinfected, since nothing really survives for very long while being beat up by UVC radiation. I don’t know if you’ll still physically _see_ those lights anymore, but back in the day at a few of the hospitals I spent time in, you’d see them hung high on the walls every so often, and you could tell when they were on because you’d see a very light colored, pale, bluish-violet “light” cast onto the wall above them.

[@xkatiesix1258]

​@@BadNaturalistspoken like a true Californian

[@user-nd7rg5er5g]

Can you recommend a good cheap spectrometer?

[@sandrinakeffufal6008]

@@babybirdhome Ozone can damage your lungs when inhaled. The hospital wants to keep you in longer for new medical complications by the sounds of it lol!

[@rho-bot]

from one scientish & beaver enthusiast to another: thanks for the reminder to not panic, that should always be step 1

[@craggslist]

I, too, am both of those!

[@mshrm_music]

you have a wonderful and rare knack for succinctly presenting information in an organic and (very!) entertaining format. thank you for being you!

[@mfbfreak]

The pump diode (the thing that throws energy rich blue light towards the phosphor in the LED that creates the white light) in white LEDs is usually 405nm which is a very deep blue color, close to the UVA range but not quite UVA. I think your test methods just happen to be sensitive to deep blue, close to UVA too. Incandescents do not produce nearly as much deep blue light as basic quality warm white LEDs, or as cool white studio lighting. The LEDs will definitely not produce any UVB or UVC light (the risky ones), simply because there is no way to produce those wavelenghts in a white LED. UVC leds exist these days but those are like 10 bucks per single, weak UVC led chip at the very least. If you get an UV meter, you have to be sure it is completely dead to 405nm or you'll get a false positive reading. You can test that by testing a standard blue LED.

[@BadNaturalist]

I will credit you in part 2 when i get the meter!

[@emilysmith6897]

Incandescents actually produce WAYY more UVA than LEDs because the blackbody spectrum is wide and doesn't just stop at the boundaries of visible light. Even though the peak is at the long wavelengths and drops off at shorter wavelengths, it's still pretty strong going well out into UVA. LEDs are designed to have a spectrum that purposely doesn't extend far outside the visual range, so it doesn't extend much farther than 400nm, but it does still hit that region a bit.

[@GrantFalkenburg]

That is wrong. White LEDs typically use 450nm blue LEDs with a yellow phosphor to generate the white light. However, these 450nm blue LEDs have a gaussian-like distribution with a full-width half-maximum of 20nm or so. Meaning that the blue LEDs do generate a small amount of light near 400nm, but it should be relatively insignificant. I suspect that the cyanotype is sensitive to the 450nm blue light of the LED. LED datasheets typically show the emission spectrum. Search "white LED datasheet" online to get some examples. Compare the spectra of LEDs of different CRIs (e.g. 70 and 90), as they use different blue wavelengths and phosphors. Of particular interest is the Bridgelux 97 CRI Thrive LEDs which aim to get as close to the blackbody radiation spectra as possible.

[@mopanda81]

cool suggestion for possible explanations here, not quite UV just very very blue!

[@jinmushui1soul]

​​@@GrantFalkenburgright? 405nm is very common "black light" UV. not too harmful to humans, enough to excite fluorophores but that's about all. still shouldn't look directly at it though.

[@scaldwell1717]

Hate to point it out but infra means below, ultra means above, ie why UV is dangerous it it's higher energy than visible light. Also cyanotypes can react to Violet visible light, I've written words on them with a purple laser pointer

[@BadNaturalist]

🤦🏽‍♀️ of course i said i backwards

[@rho-bot]

@scaldwell1717 @BadNaturalist i would like to point out that, yes blue is higher than red in terms of energy, but red is indeed higher than blue in terms of a rainbow

[@resourceress7]

​@@rho-bot🌈

[@resourceress7]

Up is down, left is right, charm is strange :)

[@FractalOmniverse]

Wow so what's the conclusion!?

[@connorgreenslade6281]

Please make more videos I need to binge them 3 isn’t enough 😭 your whole energy is infectious and really keeps you engaged

[@comradesXcosmos]

i just found this channel and i hope you create more than 2 videos soon because i love it

[@BadNaturalist]

Thank you!! Ive got two more stuck in editing purgatory

[@diehounderdoggenalt]

I just got recommended this after being recommended your video about how much you love beaver. The algorithm has favored you, an actual good channel with good content, and you need to sell out as soon as possible. Get that bag.

[@nahometesfay1112]

Same

[@kelpc1461]

i am the community outreach coordinator for counter culture labs in oakland california. i will absolutely buy one of those light meters and let you use it or happily use it with you (make an intern use it with you). but if we do then please make a follow up video or at least a short, helping us promote out community biotech lab.

[@artosbear]

Great I'm so glad UV that normally gets filtered by the atmosphere is emitted into my face by LEDs great couldn't be bad

[@SkylerLinux]

There are some cheap options of rechargeable UV A/B/C reactive test patches to see which UV is getting emitted

[@franciscotovar7536]

Hope to see more of you in the future... So, have a like, good lady!

[@gbclutchone]

i lost it at the surprise danny devito

[@Inktron]

Interesting experiments! I love this about science, it opens up discussion for further research to build on your findings. Great video

[@clockworkkirlia7475]

Ooo, excited to see more! Ultra being above and infra below I've seen brought up already in the comments, which was my only quibble. I just really like to see a bit of science!

[@yesid17]

i love your sense of humor lmao, just subscribed!

[@vanri6168]

Thank you, please make more videos. I need more. You're awesome!

[@VoidHalo]

This makes sense now. I have glow in the dark tape that lights up very bright after exposure to UV light and also noticed it glows much brighter than expected after exposure to my desk lamp. I always wondered about that.

[@CasaVipera]

I habe a UVB and UVI meter.. but located in Europe. Contact your nearest reptile specialist store, the might (should) have one. Also. I SELL/ manufacture UV bulbs for reptiles for my work. If you have any questions, send me reply and we'll figure out a way to get in contact.. cuz I'm also kind of a scientish'ed myself.. 😅

[@icejadechica]

Even if experiment 2 didn't work it might still be useful to include in a longer video! Cool idea!

[@TTHJJD100]

U missed out on the funny by saying "perhaps observation causes this to happen" my favorite light experient ever

[@murkyburke]

My favorite videos on KZbin, right here

[@ltlbuddha]

Viewed, subscribed, and commenting the 26th comment. Surely that affords you the meter, and you can buy a Ferrari with the change

[@MegaKellyschannel]

Also many average, household LED bulbs produce enough wavelengths to support photosynthesis! Figured this out when one of my plants decided to head for the lamp.

[@RoodiniCats]

I'm learning and having fun! Yay!

[@Leleanor8]

My wife, who is very fair and sun-sensitive, actually gets a little sunsick if she plays on her Nintendo Switch for more than an hour or so, and has actually successfully tried sunscreen before. This aspect of artificial light should probably be studied more. Thank you for your scienceish! ☺️💜

[@pinnacleexpress420]

didnt they make two types of Switch screens? like a basic and an OLED or something? if im right about that which kind yall got

[@más72z]

I wasn't freaking out but then you kept telling me to not freak out and now I'm freakin' out 😬 Edit: all good, the magic sequin Sunny pillow made me feel better 🫶😎

[@rafis117]

Healthy sunlight dosage is an interesting question that probably isn’t fully settled. Some things we think we know: sunlight is more lethal to many bacteria than to people, which is one of the causes of seasonal diseases that are suppressed during the summer. Additionally, people need sunlight for the natural intake of vitamin D. A carefully and slowly accumulated tan acquired without burning (such as a construction worker or farmer might have) may be well balanced as a protective layer against UVA and UVB. The biggest risk is being an inside cat (like an office worker) and then going to the beach; sudden shock doses like that are associated with the most cancer risk.

[@tammyton]

Interesting stuff! Ended up here from the beaver video and I much prefer the way this one is presented.

[@renzellousbrown]

The way I will be scouting my future child’s science teacher to have the similar personality traits of this creator! ❤thank you!

[@trent844]

I hope to gain a person like you in my life.

[@evelynlamoy8483]

Aren't UV light in bulbs a thing that became popular because big business heard their workers would be more efficient if they had Vitimin D from UV exposure? That sounds horribly macabre, but I heard that was a thing. I used a normal ass office light as a grow light for my garden this year. They get a big string and tall stems because it is low-UV so they wanna reach for it, but it works in the months leading up to passing first frost.

[@eoubre6030]

Did you only get up to flex that pillow??? 😂

[@Jotto999]

Nice. I remember that UVC clarifiers (for aquariums) need to be housed in a specific kind of glass (quartz glass) so it doesn't block the UVC. It's easy for UVC to get absorbed by various materials (even just the oxygen in the atmosphere will absorb it before it reaches Earth). I wonder if the test was inaccurate. If the LED's glass panel was made of polycarbonate or some plastic, it would absorb practically all the UVC. I guess it's sort of reassuring, how the more ionizing the spectrum is, the more easily it's blocked. If these LEDs are damaging, I suspect UVB would be a more likely culprit than UVC, since UVB can travel much further through blocking materials. Though the typical dose should be way lower than in sunlight, so normal use shouldn't be cancerous to almost anyone. Maybe unless they have unusually little melanin, or they put the light right up against them for extended periods of time. Anyway, I like the experiment and would be delighted to see a follow-up, subscribed.

[@soupalex]

commenting for the uvlampgorithm

[@Sephiroth36977]

2:39 Now THAT! That, I love! That looks like Danny Devito as Frank Reynolds playing the art critic (which I am not going to try spelling) printed on a pillow.

[@nope2095]

Yay! Interaction! Also, come on blue sky. Join ussss

[@TheGPFilmMaker]

I'm allergic to UVA - which was honestly not a diagnosis I was ready to figure out how to deal with. Halogen and Fluorescent (including CFL) lights are AWFUL. I've not had issues with house scale LEDs in the "Warm white" color, but big like "convention center" scale LEDs can definitely provoke a reaction. Also UVA goes through glass...how fun.

[@Shamazya]

Fun little experiment!

[@yourlocaldemon2195]

Sage these experiments are loosey goosey in the best possible way and I just wanna say this is healing my inner child who always had a fascination for science before the iron fist of academics killed it💖🎀

[@RoseFire6]

We need Hank Green!!

[@transrightsbaybee]

ur second pronuncjatjon of dosjmeter was correct btw 👍( :

[@forest_green]

I already knew LED lights produce ~some kind~ of tasty light because my houseplants survive in my cave of a home! My fern is very happy to sit in a windowless bathroom under one full spectrum LED light.

[@gregariosity]

Green plants use mostly red and blue-violet light for photosynthesis, not UV. if they needed UV, greenhouses wouldn’t work bc glass absorbs almost all UV light

[@usingthecharlim]

I'd be surprised if a light made UV-C. Basically, the shorter the wavelength, the harder it is to make with an LED. Also, UV-C usually makes ozone, which is really easy to smell (smells like photocopier), but I think the wavelength to make ozone is most of UV-C, but not all of UV-C.

[@BadNaturalist]

Its why the uvc photochemical sticker result is so baffling! The followup with a uv meter is coming!!

[@D415h4n34]

Ayyyy, congrats on the monetization 🤑

[@hobistinyheartbag]

Reacting to see the test I must share as well 😌

[@Jess38044]

Aw shit new fear unlocked :

[@roryroarasaur]

You might have gotten your hands on a UV meter by now, but if not then I'd recommend chatting with people with pet reptiles! Some people invest in a UV meter to know how frequently to swap out their UVB lamps.

[@BadNaturalist]

They were my start looking for a reputable one! I've never watched so many basking iguana videos in my life

[@roryroarasaur]

@BadNaturalist Sounds like a great use of time regardless of whether you got a UV meter out of it then 😅🦎☀️

[@Oscar_Dogboy]

0:28 "Step one: DON'T PANIC"

[@confusedbutexcited]

aH! Surprise Ongo! Arent we all just conditioning air? You're videos are great!

[@ferring.2154]

Watching the video twice to help fund the uv meter

[@quantumgoosey1535]

I'll keep that in mind

[@xXAlexOrWhateverXx]

I wonder if there’s a connection between the uv content of a lamp and how much it strains my eyes?

[@FractalOmniverse]

Wow so what's the conclusion!?

[@joshuahillerup4290]

As someone who perpetually has low vitamin D levels according to blood tests I kind of wish these did produce UV

[@nerdibranch]

Interacting to get the uv meter. 😄

[@RivertedYT-]

love this channel :)

[@Bulbassador]

Yo this channel is amazing

[@raimywinter2309]

Great Stuff

[@quanahlecornu478]

I have that same desk lamp. Picked up from the Valville, so who made it i dunno.

[@beepbeepsheep2732]

Here ya go! You can have my engagement for monies, good luck with your science

[@catboy_official]

I used to sleep with my desk lamp on, by my bed. All night. Because I'm afraid of the dark :(((

[@2v02]

1:46 "NOTHANG!"

[@ocelot420_69]

Can't seem to comment on the full vid but you could always start a Ko-fi to fund science tools and the like for the channel.

[@athertongraham8660]

Banger

[@ladragonnedejardin4593]

Will do.

[@quanahlecornu478]

I mean, what's the problem with UV? Does this mean I can disinfect my desk space with my lamp? Are my eyes being destroyed by looking at work illuminated by my lamp?

[@Jess38044]

Too much of it can cause skin cancer

[@SaladBowlz]

Nice pillow

[@willowtdog6449]

That’s really interesting! Are they “full spectrum” lights? Or is that just marketing anyway?

[@FlaminTubbyToast]

What made you ask this question? Like it’s a fascinating question, but did anything make you ask it?

[@levmoses742]

❤️

[@pinnacleexpress420]

you shouldve given specifics about the studio light, since it seems pretty damn sus from your experiment. a quick slide showing where you got the test papers wouldve been good as well.

[@Doublepitstochesty420]

Oof. Researched UV lights recently, uvc is bad news

[@regal-27]

I love these scientish vids

[@glitchsister]

oh so that's why i used to get a fever and a headache when doing homework next to a lamp, those are really only usable during the day time too. we need to get rid of them like asbestos

[@zeebho2527]

So sunscreen or not?

[@foolofdaggers7555]

How bad of an idea do you think it would be to put a blacklight mural in my bedroom and get UV lights to light it up?

[@okarthegreat]

Sage, we better be getting an update at some point that your last three videos blew up.

[@ollie2111]

Huh, neat! :D

[@dumpoching9433]

hope you get 5 dollars with this one

[@TheBunnycult]

ooooo 4 dollars don't spend it all on a uv meter.

[@nevuberbean]

love your content. Got my sub :D

[@BadNaturalist]

Welcome aboard!

[@okarthegreat]

Turn on your eye comfort sh8elds, friends. It's not just your circadian rhythm being f*cked up by blue light

[@pinnacleexpress420]

Alright, fine, Ill sub

[@SCRATCHBALLZ]

😂 you're hilarious

[@Middleman9595]

yeah these are fun. Subscribe

[@Zuginator]

dosimeter!

[@ProfessorTimbo]

How about I just buy you a UV meter because I like your KZbin channel? (I'm an adult man, so I don't use TikTok)

[@The_Real_Black_Jesus]

I love the editing and film style.

[@Alkaris]

Maybe researching with Hank Green who does Sci-Show to do more experiments like this.

[@BadNaturalist]

We follow each other on tiktok!!