Roger A. Shrubber
Well-Known Member
thats pretty much it in a nutshell. the first thing to decide is how much you want to grow, and how much space you have to do it in. if those two numbers don't add up, the rest of your numbers aren't going to add up either.
if you dont have at least a 30x30x60 area, be it tent or cab, you just can't really go over a 250. and you can't scrog 4 plants in a 30x30 area....be lucky to get 2, and you could easily fill 30x30 with one healthy scrogged plant.
i ran a 400 watt hps in a cooltube, in a 30x30x60, and i had to run a 240 cfm inline fan wide open the whole time the light was on to keep it under 85, and thats with a blower fan pumping in the 73 degree air from my house into a bottom vent of the tent.
you want to end up with as close to 50 watts of light per square feet of tent/cab as you can get, after that for most strain its overkill, they can't really absorb much more than that. so a 250 would cover a 30X30 perfectly, if kept at the optimum height
if you dont have at least a 30x30x60 area, be it tent or cab, you just can't really go over a 250. and you can't scrog 4 plants in a 30x30 area....be lucky to get 2, and you could easily fill 30x30 with one healthy scrogged plant.
i ran a 400 watt hps in a cooltube, in a 30x30x60, and i had to run a 240 cfm inline fan wide open the whole time the light was on to keep it under 85, and thats with a blower fan pumping in the 73 degree air from my house into a bottom vent of the tent.
you want to end up with as close to 50 watts of light per square feet of tent/cab as you can get, after that for most strain its overkill, they can't really absorb much more than that. so a 250 would cover a 30X30 perfectly, if kept at the optimum height
