Hacker News new | comments | show | ask | jobs | submit login

It turns reddish gradually, so I don't really notice it. If I disable it at night, the sudden blueness hurts for a second, which implies there's some benefit to being redder.

In some WWII submarines, the sleeping room lined with bunks for the bulk of the staff, the lighting is red. Why? Because you can sleep in it easily -- it's always just red in that room because there are some day and night shifts even on a sub.

The story that I heard (from my army dad) about red lights for night work was that red lights cause less night blindness than white lights.

Wikipedia corroborates this story, but indicates that a Navy study (from the 1980's) didn't find strong support for the practice.

Guidelines | FAQ | Support | API | Security | Lists | Bookmarklet | DMCA | Apply to YC | Contact