Sounds like a good lighting option for your van or RV interior. Dimmer controlled, 3 to 21 watts power consumption @ 12 volts.
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Green LongLife 9090101 LED Dome Light Fixture Single 921 Wedge 230 Lumens 12v or 24v Natural White
Green LongLife LED replacement lights are built with the finest LED lighting technology and materials. This Green LongLife LED features: Built-in adjustable dimmer switch; 8-30 volts DC including 12v and 24v--this wide-range voltage is designed to withstand RV power fluctuations that can damage ordinary LED lights; 230 Lumens; Natural White color; 3.0 power watts; 21 High Power 5050 SMD LEDs; beam pattern of 120 degrees; and color temperature of 4000-4500K. Each Green LongLife LED bulb has a life expectancy of 100,000 hours--many times longer than a standard bulb--which saves money and time, especially in those hard-to-reach places. This product does not contain mercury or emit ultraviolet (UV) light.