News for hackers. Stuff that matters.

A comment on LED light can damage eyes, French health authority warns. Parent comment

Re:LED light can damage eyes, French health authority warns by knodi123 on Wednesday May 15, 2019 @11:03PM (#19925794)
interestingly, the human eye is most sensitive to green light, in the sense of perceived-brightness-per-lumen.
[ Parent | on HN ]
Re:LED light can damage eyes, French health authority warns by londons_explore on Thursday May 16, 2019 @07:50AM (#19928069)
Notably, while green LED's exist, we haven't yet managed to make an efficient green LED.

If we had, then illuminating streets etc. with green LED's would save a lot of electricity for the same perceived brightness.

[ Parent | on HN ]
Re:LED light can damage eyes, French health authority warns by eveningcoffee on Thursday May 16, 2019 @10:05AM (#19929150)
It is good then that we have not. Green light is the most ugliest kind in my opinion.
[ Parent | on HN ]
Re:LED light can damage eyes, French health authority warns by hnick on Wednesday May 15, 2019 @11:32PM (#19925927)
I didn't know that! Maybe that's why it's so annoying. My reference to blue was the common belief (fact?) that blue light messes with wakefulness hormones and isn't a good idea around bedtime (hence f.lux).
[ Parent | on HN ]
Re:LED light can damage eyes, French health authority warns by londons_explore on Thursday May 16, 2019 @07:49AM (#19928060)
A lumen is already a measure of perceived brightness.

You can have a 10 watt UV light, but you can't have a 10 lumen UV light for example.

[ Parent | on HN ]
Re:LED light can damage eyes, French health authority warns by knodi123 on Thursday May 16, 2019 @09:16PM (#19935207)
oops, I meant radiant flux instead of lumens.
[ Parent | on HN ]