It’s a battle as strong as carry caliber. While it seems less covered there is still plenty of views available on why or why not to run a pistol mounted light versus a handheld. This aticle has covered it very well and offers some good points in both directions and will hopefully make you think. I personally carry handheld and prefer it, this is so I can identify threats and de-escalate if needed or backup defensive tool. Bottom line whatever you run practice it, darkness is often a predators favorite cover.