![](https://cdn.socast.io/6616/sites/377/2020/03/09150621/SleepingWoman.png)
Want a good night’s sleep? Keep the lights off – ALL of them.
A recent sleep study conducted by Northwestern University found that sleeping with a ‘moderate’ amount of light in the room affected heart rate and metabolism – even with subjects who felt they got a good night’s sleep.
They theorize that even a small amount of light can put humans or animals into a ‘pro-inflammatory state’ during sleep.