I use a scoped rifle; either my .243 or my .223. I've gotten used to holding either a Q-Beam or a Streamlight (prefer the latter) against the fore-arm with my left hand. Takes a bit of practice. (Poaching makes perfect?
) Overall, at night it's all better with two people; one on the gun, one on the light and take turns.
I took a piece of cardboard to make a tube around the Q-Beam to reduce glare into the scope...
You can mount a light onto the gun, with a pressure switch to activate with your left thumb, but most flashlights that can be fitted with a pressure switch don't have all that much range.
A light on your head screws up the scope, but can help if you just have iron sights--but it lights up the whole gun. And, proper alignment is a hassle...
Hope all this BS helps.
Art