Gold Stars 12 Package (24 Pcs) x LED Replacement Light Bulb 921/T15 Wedge base 8-30 V Natural White (2) LED Replacement light bulbs for bulbs with 921 bases the wide-range voltage is designed to withstand RV power fluctuations Applications include 12 Volt DC auto, marine, RV and military vehicles. RV power fluctuations can damage a regular LED light. Low heat, safe to touch, and instantly bright Energy efficient and eco-friendly