LEDwholesalers Brightest 3 Watt Cree LED Headlight 130 Lumen Narrow Beam Long Throw 3 AAA Headlamp, 8111 One CREE LED provides 130 lumen output, white light in high mode, Low mode and Flashling Flashing and Binking is Perfect for Biking Interchangeable AAA battery pack is mount on the back for best weight balance Fully adjustable triplex straps, Durable finish. Head Diameter + Length:1.25" or 32 mm, 2.50"or 62 mm