Read a few good articles in Guns and ammo "combat tactics" sponsored by surefire. There was a low light SWAT coarse that focused on low light and moving targets. Now most of us won't need that much training in a defensive situation but seeing on how most confrontations would occur at night it might be a good idea to practice these things. First off I've decided that even though the XM-220 is a good choice for target illumination and acquisition there are almost no holsters for it. Additionally dew to the concealed nature of our carry it would be difficult to hide a pistol with a light attached. So this brings me to flashlight techniques. Which would any of you consider the best for defensive shooting? Harries Rodgers or other. Also what flashlight would you use (those lithium batteries can be brutal on the wallet). Also with a lighting technique would it be redundant to have a night site or would an iron sight be better?