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What is the purpose of ballast in lighting? |
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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.
First answer by Kevlarster. Last edit by Kevlarster. Contributor trust: 178 [recommend contributor]. Question popularity: 2 [recommend question]
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