one thing i like about the momentary-on lotc of surefires is that it keeps you from wasting the batteries. somehow when turning it constant-on is a chore and keeping it on momentarily requires constant pressure on the button, it makes you less likely to leave it on unnecessarily and more aware of the batteries you're using up...kinda like an afterburner on a jet /ubbthreads/images/graemlins/grin.gif