Exposure to light during the day is beneficial, but nighttime light exposure has the opposite effect. This is due to its effect on your circadian rhythm, tricking your brain into thinking it’s still daytime. This reduces hormones like melatonin, which help you relax and get deep sleep.

Blue light — which electronic devices like smartphones and computers emit in large amounts — is the worst in this regard.

There are several popular methods you can use to reduce nighttime blue light exposure. These include:

• Wear glasses that block blue light 
• Download an app to block blue light on your laptop or computer.
• Install an app that blocks blue light on your smartphone. These are available for both iPhones and Android models.
• Stop watching TV and turn off any bright lights 2 hours before heading to bed.

Blue light tricks your body into thinking it’s daytime. There are several ways you can reduce blue light exposure in the evening.