One of the last things you probably do at night before bed is turn off the lights.

So leaving the lights on may be preventing sleep even when it’s time for bed.

Our body naturally cycles through three stages of sleep including light, deep, andREM sleepthroughout the night.

Woman sleeping with light on

The incidence ofdepressionincreases among people who don’t get enough restful sleep, according toEveryday Health.

Some studies found a higher risk of breast cancer and the possibility of fertility problems.

But what’s the solution for people who can only sleep with some light on?

Woman reaching for a lit lamp on nightstand from bed