I have a spanking new Light and Motion Stella 180 on my mtb currently commuterbike, that's one helluva bright baby on full but if I'm careful to tilt it down I may not blind all oncoming drivers. I may move it to my helmet, but again, I'm worried about accidentally swiping someone and blinding them. I ride mostly on bike paths and city roads with some lighting, some stretches that are just partially lit. Mostly paved so I don't really need to see the ground that well.
I have a Sigma Karma on my winter bike. I like it, or did last I used it, last winter. A Superflash in back, love that one. And a couple of small blinkies in reserve in case my batteries run out unexpectedly or I break something.
				
			 
			
		 
			
				
			
			
				Winter riding is much less about badassery and much more about bundle-uppery. - malkin
1995 Kona Cinder Cone commuterFrankenbike/Selle Italia SLR Lady Gel Flow
2008 white Nakamura Summit Custom mtb/Terry Falcon X
2000 Schwinn Fastback Comp road bike/Specialized Jett