I've always used one on my home defense pistol, but I recently got another "combat" pistol that I intended to use as the new home defense pistol, but it is also going to be a range toy and the gun just feels better without the light (already ordered and installed a new light on that one). I was thinking if there was a zombie apocalypse, I probably would shoot better without the light. Can anyone explain why having a light is always best on a (or not) for a non CCW pistol?