The Falcon scopes have 94% light transmission. So decent but not as good as the Bushnell Elite 4200, Burris Fullfield II, Zeiss Conquest etc. They have some decent reticles and some are illuminated. I prefer the one tube designed and FFP ones. I only use mine on 22LR and 223 though. I find the adjustments too vague on most ie mushy. Otherwise they are a decent optic. I'd go with something better though for hunting or serious target shooting with a centerfire.
They aren't bad and can be well suited for some uses. I use the 4-14x FFP on a couple of 22LR semi autos, a mini14 target model and the 6-18x on a 223 bolt, and a couple of rimfires. I really like them for rimfires as they can adjust down parallax wise to indoor ranges.