NAKED BULB NK-921-450WW LED Replacement EMI Suppressed Vented Bulb, Wedge T5 Base &ndash; i.e. (921 Type), 450 Lumen 8-30Volts Warm White 60,000+ hour life expectancy, made possible by Patented Vent System that allows the bulb to run cooler unlike others; 8-30 volts DC; the wide-range voltage is designed to withstand RV power fluctuations that damage other bulbs; The only LED Bulb that is EMI SUPPRESSED so as not to wipe out TV or radio stations; The Bulb base is a Wedge T5 Base  i.e. (921 Type); The Naked Bulb Runs Cooler, is more Energy efficient and eco-friendly than the incandescent it replaces, ALSO see our other great GLOW-TUBE, BUG-GUARD and MOTION-GUARD products to keep your camping area safe, secure and well lit.