that would be quite hard without producing zero lumens out the front. you may be better off with an IR fillter on a surefire and a IR monocular. but the avarage person can not dish out a few hundred bucks on something like that. i know of a few lights that are like that but no head lamps. a surefire helmet light with a ballcap adapter sounds like the best option but if they got within 30 feet and looked directly at you well... Why exactly do you want this for anyway if you dont mind me asking? for handhelds an early model L1 or a novatac would be perfect