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08-04-2011, 08:31 PM#2
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4X4 room, I was told I need 800 watts? Is that right.
Rule of thumb: 5,000 Lumens per sqft in flower.
4'x4'= 16sqft x 5,000L = 80,000 Lumens for optimal flowering.
Most 600w HPS bulbs put out around 88,000-90,000Lumens.
Didnt find an 800w, but 750w puts out around 110,000L.
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