if you sleep with a light on — even a light so dim that you can’t read by it — it triggers your adrenaline to remain active during sleep.
This leads to non-restorative sleep that can cause weight gain and lead to type 2 diabetes.
Poor sleep affects the immune system as well and has been associated with other conditions like increased risk for heart attack, obesity, stroke, and depression.
Follow a consistent sleep schedule. Try to go to sleep and wake up at the same time daily.
Avoid heavy meals, alcohol, and caffeine before bedtime. foods that contain tryptophan, such as milk, nuts and seeds can help induce sleep
Keep your environment serene. Remove all electronics and light sources from the bedroom and keep the temperature cool.