I just bought 4 raptor 6 air cooled reflectors,wanted to know should I put 1000w bulbs or 600w bulbs…
I want to put 6-7 plants up under each light and hoping to bring back 4 oz a plant.Please let me know what you all think .
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Personally I think too much light for that area, imagine that, too much light 
A 1000 watt light will cover about 7x7 feet of growing area
A 600 watt will cover 6x6 feet
A 400 will cover 4x4 feet
A 250 will cover 3x3 feet
A 150 will cover 2x2 feet.
Others of course will chime in, that will have a ton of heat, you would need some AC for sure
2 600w 8x8 tent about 16 plants iirc
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@g-shoq. You could flower that 8x8 very well with 2 - 1000 w lights.
A fresh 1000 will flower a 4 x 5 area. 20sq ft.
( I run one. )
2 would be perfect in the 8x8 with a bit to spare.
Vented hoods would be a must have for sure.
You could do it with the 600 s but yield could be affected.
6-7 plants per light is pushing the available space but still very doable. Just have to realize how big they can get. And train accordingly.
They can get big. 
Last harvest gave me 5 zips each cured with 4 plants.
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It’s been over 10 years since I ran hps but I always ran 1000w bulbs
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Just picked up a new bulb today.
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I checked your numbers and it sounds like a good plan to me, assuming you can keep the humidity and temperature in check.
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