These automotive halogen xenon light bulbs have 55 watts, 12 volts, and a color temperature of 4300K. The color temperature causes the bulbs to release a cool white light with a subtle blue tint designed to serve as automobile low beam headlights or fog lights. When driving in the dark or even daylight through snow, fog, rain or dust, you put your safety in the hands of the bulbs that illuminate your path. That being said, these halogen xenon headlights have a higher luminous efficacy as well as operating life and color temperature, meaning they will provide you with enough light but not blind oncoming drivers. The xenon gas shortens the running time and allows the bulbs to produce light quickly, whenever needed. These bulbs not only ensure your safety, but save you money and energy as well.