I CCW a G19 and have never used a weapon mounted light for my daily carry. Currently I'm using a Comp-Tac MTAC that I've been happy with but I'm exploring other options.

I'm now looking at purchasing a RCS Phantom and am considering getting the light mounted version for an X300. I know there are a couple threads from 2009 covering the topic but none of them go into great detail about CCW'ing with a light and there's a lot of typical "do it" comments that aren't very constructive or enlightening.

What are people's thoughts in terms of light or no light for CCW in terms of comfort and everyday wear? What about comfort while driving? Extra weight and bulk worth the advantages? Are the disadvantages worth it when considering the odds of actually having to pull your weapon or are you better off with just a hand held light? Any and all helpful, useful and insightful comments and suggestions are appreciated.