lighting contactor hps

  1. B

    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...