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I actually set my bedroom lights to 100% red with a 5-minute auto-dimmer when I'm going to bed.

Or when I want my apartment to look like the red light district.

Somewhat dim red lights is my mood for needing to go pee in the middle of the night.

Red light without heat doesn't give the terrarium feel. But it can give an undersea late night feel or maybe an emergency situation feel.

Red light is for sleeping for me.