Study: Too much light may disrupt sleep

A new study finds people who sleep with a light on may be keeping their nervous system awake.

The study by Northwestern University finds just one night of sleeping with the lights on spurred changes in peoples’ functioning. Their heart rates stayed higher during sleep.

It also boosted their bodies’ resistance to the effects of insulin the next morning.

Insulin resistance can be a precursor to Type 2 Diabetes.

The leading researcher on the study suggests if a night light is needed, keep it dim and at floor level.