SERFAS E-Lume 600 Headlight - 600 Lumens - Aluminum - BlackConstructed of aluminum the E Lume housing is strong and lightweight as well as an efficient thermal conductor which effectively reduces heat buildup thus helping maintain temperatures for optimal battery performance and consistent light output. Light output of the E Lume 600 is sent through a single optical lens creating a powerful beam with strong front illumination and excellent side visibility. Features: All In One Design Extruded Aluminum Body