According to Harward research, any kind of light is suppressing the production of melatonin hormone. Melatonin is hormone that makes us feel sleepy. Our body produces it when it’s time to sleep, by biorhythm. It’s suppression by light is natural, but it goes to extremes with blue parts of light spectre – any kind of blue light. So, it’s not a good idea to be exposed to blue light emission just before it’s a time to go to bed. The proposed solution for glasses that filter out blue parts of spectre is very unpractical.
For people who spend a lot of time in front of screen during night (that’s me), F.LUX is perfect solution. It’s a small program that will start slowly removing blue spectre on your screen as sun goes down, basing on time zone that you provide. It’s automated and much better than having separate sunglasses, isn’t it? Also, you can always switch it off. And don’t drink coffee during night like me! Read more on F.LUX site for further information.