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Old 11-07-2011, 10:37 AM
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millon9 millon9 is offline
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SMD stands for Surface Mound Device, which just tells you how the LED is designed. LEDs that come in the LED tail lights (like mine for example) are regular LED single bulbs, dome shape and all. The SMD LEDs look like little patches fused on a cardboard like material, not looking like a 'typical' light. The SMD technology allows more LEDs per bulb, while not taking up an excessive amount of space.

Regular (halogen) bulbs run on the arcaic filament system, which takes more energy than a LED to power, burns hotter, and takes more time to light up. LEDs are a clear advantage over halogens due to those reasons. The lifespan of an LED bulb compared to a halogen bulb is unreal as well. Unless you totally destroy the bulb in a wreck, the LED will MOST likely out-live the truck, as they have a typical lifespan of anywhere between 40,000 and 100,000 hours of life.

HID (High Intensity Discharge) is a lower wattage, Mercury-based, light option. Mainly used in headlights, however they have been added to reverse lights in some vehicles. They are available for most vehicle applications, in a conversion kit, where a ballast, and possibly a relay, are installed converting the power to a steady 35W to light the bulb. Light output is far, far better than the best halogen bulb you can find.
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