Lumitronics Double RV Ceiling Dome Light - On/Off Switch and Removable Lenses. Perfect Interior Replacement 12V for RVs, Motorhomes, Campers, 5th Wheels, Trailers - Mounting Hardware Included DESCRIPTION: Oval style double optic dome RV light with on/off switch DESIGN: Provides maximum light output in a great looking incandescent light! FEATURES: Removeable snap-on clear polycarbonate lenses and replaceable bulb DURABILITY: All-weather molded plastic housing and durable lenses prevents corrosion SPECIFICATIONS: 4.25" x 10.25" x 2"; Uses #921 Incandescent Bulbs