Doesn't blue light keep your brain active?
It is true that long exposure to high intensity blue light can inhibit the production of melatonin (the sleep hormone), and therefore prevent you from falling asleep.
Having that said, Dodow's light is far too weak to have an impact on melatonin secretion:
- Dodow light intensity < 1 lux
- Computer or TV screen = 60 lux
Once projected on the ceiling, Dodow's light is set to its maximum intensity, which for someone lying in bed, has a very low intensity (less than 1 lux).
Compared to the high intensity of a computer or television screen (about 60 lux at a distance of 50cm).
There’s also the additional low exposure time (8 to 20 minutes).