The brightest sight I've used by far is the new Copper John sight. It's brighter than the Viper, Trophy Ridge, Extreme, and Spot Hogg sights that I've used. The one thing I will say is that all of the sights I mentioned were bright enough that I could still see the pin through my peep when it was dark enough that I could not make out what a deer was at less than 10 yards other than a deer. It's to the point that sights are bright enough that you don't need anything more.