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The ballast is a transformer that steps the voltage up higher than its incoming voltage.

This is usually used with flourescent, metal halide, & sodium vapor lights.

The higher voltage is needed to 'excite' the gases within the bulbs and make the molecules bounce around and give off light.

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โˆ™ 2008-08-12 15:46:18
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Q: What is the purpose of ballast in lighting?
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Where is the ballast in strip lighting?

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A HID ballast can be purchased from Amazon or eBay. The term 'ballast' is used to describe large inductors used to limit AC current for fluorescent lighting.


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If the fluorescent lighting ballast is attached to a metal lighting fixture the grounding occurs through the metal of the fixture and the screw that holds the ballast in place. Other wise you need to add a gounding clamp or a grounding pig tail to the metal of the ballast. This would only be done in custom installations.


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