I got a 10k lumen LED flood (110W of LED! 😱) to combat winter gloom. I turned it on the first time without thinking about where I was looking and it was like opening the Ark of the Covenant. Also fun: it produces hilarious artifacts on the iPhone camera—weird grids, banding, etc
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You should know most LEDs have a cyan dip, which is right at the peak of melanopic sensitivity (the thing that matters for SAD). Was looking into some near-IR LED chips on AliExpress and the good news is cheap cyan LEDs seem to now exist.
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Oh very interesting. I wonder if cameras can sense this and generate a response curve for a given light?
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This is not possible with a regular camera unless you have a known reference reflective surface since the RGB data means you have no way of knowing which combination of wavelengths yields a particular color (metamerism). Camera might not measure brightness so that might not work.
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If you can detect brightness, you might be able to find a set of translucent screens that you can place in front of the light, but best option is to get the data from the manufacturer. If you can't get the data, the dip is probably present since I think that is the cheapest style
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