I fixed a power wart LED today using black electrical tape, with a needle hole.

Ideally instead I need some stick-on semitransparent dark-alpha stickers to reduce brightness. Maybe I should use two polarized stickers, and rotate the second until brightness is perfect.

Are there non-linear solutions or HEV-sensitive photochromic solutions - so that LED brightness is low in the dark but bright enough in sunny conditions?

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moffkalast 2 days ago | parent [-]

I sure wish that were a thing, if you happen to figure that out let me know. So far the only real solution I know of is active throttling with a photoresistor and a mosfet based on ambient light.

	▲	robocat 9 hours ago \| parent [-]
		Yeah, active electronics seems like the only solution that would vary brightness correctly. But electronics are too impractical for the simple problem of modifying existing LED lights. Some quick searching didn't find any photochromic films (Visible Light Activated) that were activated by say blue light rather than UV light. Plus it seems the chemicals don't darken as much (cf. familiar UV-sensitive glasses) and they work best with particular wavelengths (so might not work under different sources of lighting). I will stick with cheap plastic tape/film and pinpoint holes because of advantages (tidy, colour match the device, fitting around, easy to revert).