Hacker News Reader

I have Phillips Hue and turn them 100% red at night as we're going to bed, sometimes for a few hours, no idea if it's helping my eyesight though. Been doing it for a few years.

View on HN

Why are you doing it?

There have been persistent claims that cool color-temperature (bluish) light in the evenings disrupts sleep quality. I unfortunately can’t remember if that comes from rigorous studies or pop psychology.

The application flux has a lengthy list of studies on their site.

I struggle for any period of nighttime on a screen without it now.

https://justgetflux.com/research.html

The reason why it may be useful to avoid blue light at night is that circadian rhythms and melatonin production can be disrupted due to ganglion cell stimulation. They are a class of photoreceptors that have peak sensitivity to blue light. They do not appear to contribute much in the way of spatial vision but are important to entrain day night cycles and for pupillary responses. https://en.wikipedia.org/wiki/Intrinsically_photosensitive_r...

Not op, but I actually remember reading about a study where exposure to red light before waking up can help with addressing alertness after waking.

Here it is: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6506010/

I also know that astronomers use red light while ‘scoping as it doesn’t impact the eyes sensitivity

Reply on news.ycombinator.com