Discussion in 'First Time Marijuana Growers' started by Eric_Fortis, Jan 12, 2013.

  1. So, as far as I know, a HID light is attached to a ballast, for some reason.

    What is a ballast and what does it do?
  2. A ballast is what sends electrical power to your lamp. A hid ballast is required to ignite the bulbs.

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