Surface mount LED Dome light with on/off switch. Lamp is made of gold plated ABS plastic. Lens is made of high quality PC plastic. * Base Diameter: 6" Lens Diameter: 5.11" Depth 1.9" * Why choose LED Technology? LED technology bulb has least 50 000 hours of operation, which is a stark contrast of incandescent bulb which rarely gets to 5000 hours. The cost of replacing traditional bulbs will far exceed the higher costs of LED bulbs in the long run. LED technology has 80% energy efficiency; 80% of electrical energy will convert to light energy. Incandescent technology has 20% energy efficiency; 20% of the electrical energy used only produces 20% light energy. In real money terms therefore; If a 100 Watt incandescent bulb is used for 1 year, with an electrical cost of 10 cents/kilowatt hour, $88 will be spent on electricity costs. Of the $88 expense, $70 will have been used to heat the room, not light the room. If an 80% efficient LED system had been used, the electricity cost would be $23 per year - there would be a cost savings of $65 on electricity during the year.