I recently purchased a G21 (3rd gen) and am considering a Glock GTL 10 Tac Light. Primarily, this pistol will be my bedside weapon. I know it is debatable as to whether a weapon mounted light or a handheld light is the better option, and I imagine I will have to decide which I prefer, but just wondering if the Glock light is a good choice, as I've never owned a weapon mounted light.