One of the latest crazes in sleep gadgets is red light sleep devices. The trend was inspired by NASA red light sleep devices for astronauts on the International Space Station (ISS). The ISS system turns on blue lights to simulate morning and help astronauts wake up, white light to create daytime, and red light to create night and improve sleep (source).
Back on Earth, more and more red light sleep devices are being offered and purchased to improve sleep. Unfortunately, on Earth, the scientific evidence of improved sleep from red lights is very limited. Some devices are claiming red light around 630 nm wavelength could help stimulate melatonin production, simulating a sunset. The evidence of effectiveness is insufficient, and much more research is needed.
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