Flashlight options

Getting ready to put a Glock 45 build together was curious what I had option wise for lights I run a TLR1-HL on my other handguns but this is gonna be a gift for my brother who’s turning 21 he’s got no idea I’m putting it together but I don’t have a lot of experience building out Glocks and wasn’t sure if the rail system was gonna be an issue any advice would be greatly appreciated I just wanna put together something that’s gonna be functional and dependable