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It's quite an advanced set up to just start off with, check this guy out:
http://boards.cannabis.com/showthread.php?t=87140

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faithless Reviewed by faithless on . HPS Lamp Question.. Hi everyone.. Starting to set up a grow room, was thinking of 2 1000w HPS lamps to start with, any ideas on how many plants that would cover, or am i better with one Metal Halide & 1 HPS ? Thanks in advance for all the help :p :thumbsup: :) Rating: 5