This high-output, high-intensity Litespan LED is an easily installed replacement for your halogen MR16 lights LED's operate at a lower temperature and power load than halogen with an average 25,000 hours of use This miniature LED reflector bulb produces 400 Lumens from its 12 volt, 7 watt, 6 LED output with a bright white 4000k color output These non-dimmable Litespan LED's fit all standard MR16 Bi-Pin GU5.3 bases Their concentrated beam angle of 20° puts more light down the road in front of you for true driving light capability. 3-3/4" long with a 2-3/8" diameter that can mount to existing light bars with their 8mm mount