Safe to swap MH and HPS Bulbs?

Discussion in 'Growing Marijuana Indoors' started by forsakic, Apr 11, 2006.

  1. Hi everyone, I just bought a Sunlight Supply 250 Watt Sun System II light. It came with a MH and a HPS bulb. Can I screw in whichever bulb I want and swap them whenever? Thanks.
  2. Unless it's a switchable ballast, then only one of the bulbs will work..but you need to know wether it is a high pressure sodium ballast or a metal halide ballast. Only use the bulb that is meant for the system unless it is a conversion bulb.

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