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lighting contactor hps

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    Lighting safety + ventilation questions

    Hello, My growspace is 2x2x5' and I just bought a 150hps light (2100k light + digital ballast + cooltube). I read about needing a contactor/timer relais for using HPS lights since there is an inductive power load instead of a resistive one. While buying my equipment at a local growshop I...
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