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    Ballast amp + light amp = total amps?

    I'm wondering what the TOTAL amps would be when considering my light and ballast combined. The light is a 1000w hps and the ballast claims 9.5 amps at 120v. Calculating the light amps at 120v is about 8.3amps. Does the ballast use an additional 9.5 amps to run the light (17.8amps) or is...
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