The Blaze 1 Watt is is twice as bright as the legit' 1/2 Watt.  Put this light on your handlebar or helmet and operate it in a low or high mode, it will fit on bars 25.4mm to 31.8mm.  It's bracket mount makes adjustment easy and without tools.  High, low, and flashing mode run for 7, 14, and 20 hours, respectively.  By the way, did we mention the flashing mode is visible in daylight...