Green LongLife LED Replacement Bulb for Long-Neck Reading Light with 1383/1156 Base:100,000-hour life expectancy8-30V DC, including 12V and 24V; wide-range voltage is designed to withstand RV power fluctuationsReplacement LED reading light bulb designed for a long-neck unit with a BA15S T25 base, popularly known as a 1383, 1156 or 1141 baseLow heat, safe to touch and instantly brightEnergy efficient and environmentally friendly This product ships in approximately 1 days