Having now skimmed through the paper, there's one very reassuring thing that no-one's pointed out yet: Long-term exposure to LED at 500 lux, in cyclic (light/

Having now skimmed through the paper, there's one very reassuring thing that no-one's pointed out yet: Long-term exposure to LED at 500 lux, in cyclic (light/dark) conditions induced retinal damage only in albino rats but not in pigmented rats So, at household levels WITHOUT artificially dilated eyes, only the albino rats (who one would assume are more sensitive to light) suffered any damage. Given that, as another commenter mentions, rats are likely to be more sensitive to light than humans anyway, this looks like it's a reassuring rather than concerning result. Just don't artificially dilate your eyes then stare at a super-bright LED bank for 24 hours!