Features Direct replacement for factory incandescent 921-size bulb. Omnidirectional LEDs for full distribution in housing. Metal base for thermal dissipation and reliability. Nonpolar circuit design with voltage spike protection. Increased output with LED Appearance. Plug and play simple installation. 210 lumens per bulb. Overview Upgrade. Add a modern appearance to your vehicle's lights with the 921 HP36 LED bulb. Populated with 36 high-power Samsung LEDs the HP36 illuminates a full 360 degrees. Housed in an aluminum casing with a textured finish for superior heatsinking properties the HP36 will last for years to come. Best of all installation only takes minutes - simply take out your factory bulb and the HP36 will fit snugly in the socket. Brightness. At 210 lumens the HP36 will provide slightly more total light output compared to your factory bulb. All Diode Dynamics LED lighting is rated with accurate measured lumen figures not calculations or guesses. We test the true output in-house and provide you the real numbers to compare. Reliability. This bulb is built with constant-current circuitry along with transient suppression. That means this bulb will last for years not months with no flickering or failure. And like every Diode Dynamics product it's backed by an industry-leading three-year replacement warranty. Experience. After over a decade in business Diode Dynamics is the most trusted name in automotive LED lighting. We assemble and engineer products ourselves in the United States for high quality and fast time-to-market of the newest and brightest LED technologies. We pride ourselves in offering only quality LED products that will exceed your expectations. Please contact us if you'd like to discuss your lighting project!