Use your devices without a filter at night and you might get the blues from lack of sleep, reports New Atlas.

The most important signals that adjust this rhythm are daylight and darkness. It is primarily light of a blue wavelength (blue light) that stimulates sensors in the eye to send signals to the brain’s internal clock. Blue wavelengths are essential and beneficial during daylight hours as it helps us to stay alert and is known to boost performance and attention. However, the same blue light can wreak havoc on our sleep patterns!