Indoor need someone with experience with lights.

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fweedom

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Can somebody explain exactly how lowering the digital ballast to 50% or 75% HPS effects the actual light output? I have a 4 ft x 2 ft tent and may get a 400w hps with an air cooled hood buy a saw the 600w weren't much more. I live down south where its hot so I wasn't sure if a 600 would be to much. So basicly if u have a 600w and its running at 50% or 75% is it still giving off more lumens than a 400w at full strengh? Please help:D:toke:
 
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