This app was mentioned in 2 comments, with an average of 2.50 upvotes
Im not sure it will help on an LG, but my old Moto G4 had retension issues and I figured out that if you use a blue light filter app, (https://play.google.com/store/apps/details?id=com.lunatouch.eyefilter.free) set the color to black, and at 10% it will get rid of the problem.