Exposure to white and blue light in modern environments can delay sleep onset by reducing melatonin production.

“melatonin is a hormone that is inhibited by light. Melatonin is the hormone that allows you to fall asleep easily.”

“We have a lot of white and blue light in our modern environments, including our homes, that can delay sleep onset by decreasing your melatonin production.”

“and that melatonin as it rises it will help time the onset of your sleep”