![]() One advantage of this form of light generation is that by adjusting the material properties of the semi-conductor, one can adjust the frequency of the emitted light, thus changing its color. If you really want to get into the details of this, check out How Stuff Works article on the topic. This movement of electrons generates light. ![]() Instead, an LED transfers current through a semi-conductor. Unlike halogen bulbs, LEDs don’t have a filament that current is passed through. Light Output: LED and HID headlights both have excellent light output, but LEDs illuminate instantly, while HIDs take a few seconds to achieve full brightness and proper color.Longevity: LED headlights have unmatched longevity compared with HID and especially halogen headlights.LED headlights win the comparison against HIDs narrowly for a few reasons: The sun’s color temperature at noon is 5500K – 6000K. Headlights whose light output most closely matches the sun’s color temperature tend to be the most effective for the human eye. The Light intensity is quite weak for the halogen and HID, while the LED bulbs have a very tightly concentrated, focused beam right near the center, with a strongly curved beam emanating from the center.Īlso, the color is higher on the Kelvin scale, coming in the right around a 6000K color, while the HIDs are closer to 5000K, and the Halogens at a 3500K or so. In this case, I’ve swapped one of the halogen bulbs for a LED bulb. From the factory, it’s equipped with HID low beams and halogen high beams. This example uses the headlights of an Infiniti G35. The image above demonstrates a clear advantage of LED headlight bulbs.
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