Blue light emitted from smart phones and computer screens alike is becoming a growing concern for sleep scientists. Study after study show that the light produced by modern LED screens slow or halt the production of melatonin, the hormone that signals our brain that it’s time for bed.  A recent Harvard study suggest that blue light exposure in the evening can alter sleep schedules by up to three hours.

There are phone apps that can lower the amount of blue light your mobile devices emit, and there are computer glasses as well that can help filter out some of the light, but most experts recommend limiting your phone or computer usage before bed.

For more information follow these links:

Blue light blues: the invisible force sapping students’ sleep

Blue Light: It’s Both Bad And Good For You