I'm currently using a non railed P226 as my primary "bump in the night" gun. I don't like the idea of having to fumble around for a separate flashlight. I'm curious to see what other options there were for light mounting besides the Surefire adapter that attaches to the trigger guard.
http://www.surefire.com/parts-accessories/adapter-mounts-for-x-series-weaponlights/mr14-mounting-rail.html
You can try to find an older Surefire weaponlight similar to this one
Beretta light