mercury vapor light?

Discussion in 'Growing Marijuana Indoors' started by cannabis87, Jun 1, 2006.

  1. hello, i have a 175 metal hallide light, that requires an M57 ballast, however, i was told at home depot that a175 watt murcury vapor ballast will work fine witht hat light, and save me a bundle. the m57 ballast would cost me 59.99, and the murcury one woudl cost me 17.99, so id really liek to know if thats true. also, does anybody know if an s55 ballast is cheap, for a 150 HPS?

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