Join Date: Dec 2001
Location: Belleville, Illinois
Thanked 22 Times in 17 Posts
Wattage is the amount of electrical energy put into the light, and doesn't directly say anything about how much light comes out. HID lights have been promoted as making light more efficiently - more of the electricity is converted to light and less to heat. I've never seen hard figures of the efficiency ratio of HID or halogen lights, but I wouldn't believe that a 35 watt HID could produce as much light as a 55 watt halogen - that would require that the HIDs be 36% more efficient than halogens.
You should be able to find output information on the lights you're considering. As I understand it, a lumen rating is how much total light is given off, and the candlepower rating is how bright the light is, so it's related to how tightly the beam is focused. There's a lot more to lights than wattage.
Last edited by Jim_Lou; 04-16-2009 at 07:24 AM.