lumens (brightness): High -- 2400LM Low -- 1200LM Specially made for motorcycles -- to fit within fairings and to withstand rain Beam Angle: 360 degree from 4 surfaces light emission (no dead spots) Uses specially made high quality COB light source LED, for instant brightness. Contains a fan with high rotational speed, high power, low noise with 6500 revolutions per minute. Excellent heat ventilation with great service life. 200% brighter than your stock halogen headlight(s) Installation instructions are not included in the package (because it is not necessary). Professional installation is highly recommended, although not necessary. If you do have trouble with installation, please see the following videos. Please note that they are installing the lights on different bikes, but the procedu