Green LongLife 5050191 LED Replacement Bulb 921 Wedge Base 340 LUM 12 or 24v Natural White Bright 340 Lumens, 921 Wedge base 120 degree angle bulb Built with the finest LED lighting technology and materials. Applications include 12 or 24 Volt DC auto, marine, RV and military vehicles. RV power fluctuations can damage a regular LED light. This LED is designed to withstand a wide operating voltage range. Wide Voltage Range: 8-30 Volt DC 100,000 hours life expectancy. Lasts much longer than a standard Lighting.