3 ms·

How does red light help sleep? I googled just now, saw some stuff, but interested to see what you think or know.

• nkingsy 8y ago
  more red signals sunset to the brain. Read in the HN comments that bunks in the navy are equipped with red lights so one person can read without disturbing the sleep of others.
  • vram22 8y ago
    Thanks, and will check those comments.