Those “color vision correcting” glasses (e.g. EnChroma) use an optical technology called notch filtering:
“EnChroma glasses are spectral notch filters that remove light from two regions of the visible spectrum: from the region near 480 to 490 nm (in the blue–green part of the spectrum) and from the region near 580 to 590 nm (in the orange–yellow part of the spectrum).” https://www.practiceupdate.com/content/the-effects-of-enchro...
This article states the conclusion of the research is the problematic light has “a peak around 477nm, with the 50% sensitivity level from 438-493nm”, and from looking at the graph it seems 420-500nm covers it down to 20% sensitivity.
It seems like a set of glasses with a spectral notch filter blocking out that chunk of the wavelength spectrum could do an end-run around all these issues. Put them on when the sun goes down and it doesn’t matter if your LEDs are leaking blue light, your dimmers don’t go low enough, or you can’t stop yourself going on your phone in bed. From other comments here it seems “light from above” has a particular importance for physiological reasons, so the glasses should incorporate a shroud from the top of the frame to your eyebrows to block out all light from above as well.
I’m no expert on optics but it seems spectral filters aren’t hard to buy. Something with a center wavelength of 475nm and a full-width half-max between 60nm and 100nm should do the trick.
I would just form a cylindrical lampshade out of such a sheet and call it a day.
My bedroom has a dimmable, multi-colored LED in a cloth lampshade that definitely filters some blue light and it's possible to sleep with it on, so I guess the inexpensive, low-tech solution, as it's often the case, works just as well.
Yeah, it looks like off-the-shelf spectral notch filters are aimed at laser laboratories. Around 800 usd per lens so 1600 for my glasses, bit steep. You’d get some pretty awesome looking Doc Ock style goggles out of it, though
“EnChroma glasses are spectral notch filters that remove light from two regions of the visible spectrum: from the region near 480 to 490 nm (in the blue–green part of the spectrum) and from the region near 580 to 590 nm (in the orange–yellow part of the spectrum).” https://www.practiceupdate.com/content/the-effects-of-enchro...
This article states the conclusion of the research is the problematic light has “a peak around 477nm, with the 50% sensitivity level from 438-493nm”, and from looking at the graph it seems 420-500nm covers it down to 20% sensitivity.
It seems like a set of glasses with a spectral notch filter blocking out that chunk of the wavelength spectrum could do an end-run around all these issues. Put them on when the sun goes down and it doesn’t matter if your LEDs are leaking blue light, your dimmers don’t go low enough, or you can’t stop yourself going on your phone in bed. From other comments here it seems “light from above” has a particular importance for physiological reasons, so the glasses should incorporate a shroud from the top of the frame to your eyebrows to block out all light from above as well.
I’m no expert on optics but it seems spectral filters aren’t hard to buy. Something with a center wavelength of 475nm and a full-width half-max between 60nm and 100nm should do the trick.