The Author Xray 150 lm is battery headlight with a 150 lumen output. The Author Xray 150 lm is equipped with the newest lens techniques. The lens is optimized to maximize the light output, light beam and the lumen efficiency. The beams are projected in a wide range, not in a straight line only. It also features side lens cutouts, which provide you with a 180-degree light beam and increases your visibility to other road users. LED 150 High Lumen. - The light comes with 2 different light modes. Over drive (150 lumens – 6 hrs battery life) / Commuter (80 lumens – 10 hrs battery life) / Flash (30hrs battery life). - Battery 3x AAA zinc carbon battery (included in packing). - The universal bracket mount fits any sized tube with a diameter of 22-35 mm. - Size 90 x 40 x 25-35 mm / Weight 106 g (incl. bracket and battery).