Does blue light actually affect sleep?

My fitness tracker showed a clear drop in my deep sleep percentage whenever I used my phone right before bed. Now I use the automatic blue light filter on my phone after 8 PM, and my sleep scores have actually improved.

Yes, blue light from screens suppresses the release of melatonin, which is the hormone that tells your body it is time to sleep. Try turning off your devices at least an hour before bedtime and read a physical book instead.

Keep your mind calm before sleeping and try to avoid screens. Setting a positive, quiet environment at night naturally helps the body rest. Take care of your mind, and sleep will come peacefully.

Of course it does, screens keep your brain awake thinking it's still daytime. Just keep the phone away in another room at night and see how much better you sleep, no need to overcomplicate it.

As someone working long corporate hours, I noticed a huge difference when I started wearing blue light blocking glasses in the evening. It is a quick, practical solution if you cannot completely avoid checking emails before sleeping.