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by ben_w 491 days ago
Some wavelengths don't penetrate so deep, and not all bulbs are the same brightness.

I've seen obvious lies on some product descriptions on internet listings, therefore I wouldn't trust a specification claim like "x nm" or "y lumen", and unless I had tools to measure them I would not rely on them meeting those specifications.
2 comments
PeterStuer 491 days ago
Lumen does not measure much red light.
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ben_w 491 days ago
Lumens being perceputual brightness means any package listing it for IR is definitely lying; but that only makes it a first-pass filter, "no false positives" does not mean "no false negatives".

e.g. even when it's about visible light, well, do you trust this claim of 500,000 lumen?: https://www.amazon.de/Shadowhawk-Rechargeable-Extremely-Wate...

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zimpenfish 491 days ago
> do you trust this claim of 500,000 lumen?

Having watched Torque Test Channel test[0] these[1] kinds[2] of claims, no, no I do not.

[0] https://www.youtube.com/watch?v=pp8dumORMA0

[1] https://www.youtube.com/watch?v=EBPQKeeYTfo

[2] https://www.youtube.com/watch?v=ceA5xL6ggEw

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its-summertime 491 days ago
Yeah but like, don't buy from temu or something, buy from digikey etc and just wire it yourself, its cheap enough to be able to fail 20 times without costing more than a burger.
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