1). High Quality Bulbs H1 2). Quartz Glass 3) 550~600 Hours Lifespan 4). High Level Road Safety 5). +30% Light than othe About usHD automotive lights are made of quartz glass, filtering ultraviolet ray, prevent lamps and lanterns of aging.Fill in high concentration Krypton, increase brightness, circular filament protection, international brand packaging, let your long-term benefit!About the ...