Camco RV Replacement double dome light. Measures 12" L x 4.25"W x 1.5"H. 12V bulb design includes instructions and bulbs. These double dome lights are very durable, highly effective and easy to use. 12V light Includes instructions and bulbs Measures 12" L x 4.25" W x 1.50" H Easy to use and store Replacement bulb #921/Camco #54769