GoldenGadgets T10 921 194 Wedge RV LED Disc Bulb with 12 LED - Bottom Mount - White 6000K - 12V or 24V DC 220 Lumen output using only 2 Watts compared to 25-Watt 921 Incandescent Bulb Disc Shaped for easy install in flat and small spaces Voltage Regulated for 10V to 30V DC to handle RV and Boat voltage fluctuations. Instant On and Shock Resistant. Lifetime Warranty. Rated for 36,000 hours