TRL-1s on my pistol. M300s on my rifles. For a pistol light I don't suggest going above 300 lumens or you risk catching the light yourself. If the rifle is going to be used as a primary outdoors gun when checking your perimeter, 500 lumens should be plenty.
In terms of a handheld light, the one I use is a 5.11 LTAC L1. About 150 lumens and perfect for close illumination or when you want to shine something without pointing a gun at it.