Measure Like a Pro! (TKLamp Flashlight Tester)

[@DarrenYeoYT]

This would be really handy for my reviews. I notice they also have other models that plot data as well... Thanks for the video.

[@rayoflight62]

The cost of an integrating sphere come mostly from the nature of surface material, as you mentioned in the video, and from the precision of its machining. When you go in single lumen - sublumen territory there is a series of different phenomena like scattering, re-emission, photoluminescence, etc. - which are not linear along the considered spectrum, that goes from the far infrared to high ultraviolet, and the composition of the ceramics (properly doped to achieve linearity) is a trade secret. The £400 price tag may be considered expensive, but it is peanuts for a light integrating sphere. I understand they avoided the use of exotic reflective materials to sell it for so little, but the limitation of this integrating sphere is that it cannot operate with the high temperatures induced by 10K+ flashlights. Do the manufacturer provide NIST traceability? If yes, it would make sense for other reviewers to adopt it; 10k+ lumens flashlights are a very small minority of the flashlights sold. I avoid to watch those flashlight reviewers which have adopted some measuring contraptions using a polystyrene box or a drain pipe. Sending a flashlight to a NIST laboratory and then using it to calibrate their light integrating drain pipe is an absolute mock of the science and the flashlight hobby, makes me so upset that I can't keep watching. The calibration requires a frequency sweeping source just to start, not a "NIST flashlight" - the errors are in the order of 50% as the Led emitters shift from 6300 to 6500 °K while the current increase and the phosphors heat up. Those mousetraps are a preposterous proposition to anyone who has read the first pages of a book about metrology, and demean all flashlight hobbyists who know something about the science of measurements. This low priced "lumen meter" may solve the visual offence of the mozzarella boxes appearing in flashlight reviews, but only if the calibration is traceable. Thank you for your dedication to the High Muse of light. I have your same fascination for torches and lights, but at the same time I can't dedicate much resources to what in the end is a bright hobby. Regards , Anthony

[@Gman1024]

Awesome looking test equipment. I'd love to see a database of test results, like you have for your recommended list. Absolutely priceless data for sure.

[@ligitmuffin]

Still love that my favorite 2 flashlight youtubers teamed up.

[@NorthBorneoLights]

If, say, you were able to find another box that was a bit more durable, does it look like the insides would be easily transferable to a different box?

[@ethan-lumencraft-]

It does not seem so.

[@dave_n8pu]

I went and checked out their web page, I didn't see the price listed on the landing page, for how I use one of these flashlights, I doubt this product will end up in my inventory. Thanks for sharing this with us.

[@alanrabinowitz7111]

It costs 400 dollars. Its a nice attempt but needs refining.

[@taskelam8937]

The maximum lumen limit is not an issue because lumens and candela behave linearly. You can just measure the lumens on a dimmer mode and compare the candela values between the measured modes and turbo. Increase measurement distance if the lux meter tops out.

[@tomb6269]

Great video, thanks for sharing.

[@RAMASHANKARSHU]

Your website is out of products such as led driver for SFT40 or 70

[@bentaylor-cv4ox]

So this is awesome and $400 isn’t expensive imo, not for a quality meter. I was expecting closer to $1k. However, you lost me with the limits on lumens and candela. I am hoping in coming years that technology pushes the hell out of flashlights to where we can get a 25k lumen turbo mode as the norm, so cutting off at 13k lumens isn’t gonna cut it for me. Do they have any options that register higher lumens?

[@Lumencraft-]

There is a new upgraded model that has a 35K lumens limit: kzbin.info/www/bejne/oIK1aqGDaZiSp8k The version shown in the video is the one that's actually available for purchase at a slightly higher price: www.tklamp.co/product/tklamp-flashlight-tester-tk2303d

[@bentaylor-cv4ox]

@@Lumencraft- excellent. Only $469. That would be affordable if I could ever break my current habit

[@SaibaKeiosu]

The aperture system should have been a variably adjustable iris like on a camera lens/the Stargate

[@ethan-lumencraft-]

That would be cool, but incredibly difficult to machine, and would be less accurate than a solid piece.

[@SaibaKeiosu]

@@ethan-lumencraft- mm fair - especially being coated with that fragile material What's the consistency like? Chalk/gypsum? Or am I way off?

[@markifi]

i thought it'd be more expensive than it is

[@ethan-lumencraft-]

Yeah, $400 is a really great price for a calibrated sphere like this!

[@CromulentEmbiggening]

What happened to Matt?

[@yannisgk]

he's in a hospital from injuries caused by a fleshlight . ;P

[@BariumCobaltNitrog3n]

I think it was made for people who review the fake claims on Amazon of high lumen lights. Torque Test Channel just did one of 8 lights up to 900,000 lumens for cheap, but most turned out to be around 800-1200. The brightest one was a Wurkkos that advertised an honest 12,000, a 3 cell pop can (I forgot which) at $129

[@ethan-lumencraft-]

Yes, Torque Test Channel was the first to show off what was a prototype version of this sphere.

[@BariumCobaltNitrog3n]

@@ethan-lumencraft- OH. So the Wurkkos might have maxed it out.

[@adambater2767]

What happened with matt???? Is this his son or someone he works with?????

[@Oxirix1207]

Thats Ethan, hes the guy from the luxwad channel. Looks they they teamed up a year ago or so, which is awesome because luxwad did great work.

[@MML66]

Guys, I love collecting flashlights, but is this an ongoing hobby? What I mean is, does the LED have a lifespan if you don’t turn it on, just leave it on the shelf, or not?

[@rayoflight62]

I have flashlights with Luxeon I and Seoul P4 LEDs which still work fine after twenty years. My first generation power LED flashlights emitted 15 Lumens, (Surefire L1 with a Luxeon I bin P4, purple colour), then Philips invented the flip LED (K2), doubling the lumens for the same current, so the various flashlights of the time all emitted 200-300 lumens. I have various expensive Fenix and Jetbeams from that time. Then come the third wave, and the brightness improved ten times. My current collection of lights can all get to 3000-4000 lumens (peak) with one 21700 battery. This to say that, along the years, the LEDs do not degrade, but obsolesce. Paid £200 for a 250 lumens Jetbeam thrower with magnetic ring control, which is worth nothing today. If you are looking for an heirloom purchase, look away from flashlight, and orient yourself toward mechanical Swiss wristwatchs. If I would have bought some Swiss watches instead of flashlights, I would own a small fortune today, instead of piles of scrap aluminium...

[@BariumCobaltNitrog3n]

If it's a decent one like Cree or Luminus, and you use it for an hour a day, every day it will last about 1,369 years. Lifespan of most LEDs is 50,000-100,000 hours and the two mentioned over 500,000 hours or 57 years if you never turned it off.

[@MML66]

@@BariumCobaltNitrog3n Thank you, this helps me a lot

[@MML66]

@@rayoflight62 Thank you for the detailed response. I missed the fact that technology develops the LED and the most powerful flashlight in the 1990s. You can now get one more powerful than that at a cheap price. It seems that it is an impermanent hobby.

[@TouYubeTom]

audio is noisy af

[@ethan-lumencraft-]

Unfortuntaley yes, my microphone was positioned poorly