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HID or high intensity DISCHARGE lamps are lamps without filaments. They work as a gas discharge system which means that they work similar to a flourescent tube, in that they have a ballast system which provides a start-up voltage and then settles down to a running voltage once the lamp is ignited..

The lamp itself usually consists of a quartz shell, filled with some type of gas such as argon, zenon, etc. As a result, they are capable of putting out some serious lumens. The big drawback is that they usually don't last as long as regular incandescent lamps or LED's, and are more expensive to replace.

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Q: Why do you use ignitor for HID Lamps?
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