I use this blue light filtering screens

This company has proved me good customer support and service as they replaced without charge a wrong sized protective screen on my laptop (mainly my fault as I ordered from Amazon but ordered the wrong size- order the standard 13” wide rather than the one specifically made for my MacPro laptop- they have products specifically for Apple computers & devices). I like their quality of packaging and materials too. I have these on my son’s iMac & ordered one for my daughter’s laptop, too.