hps for small tent

i have a 3 foot tall tent and i am thinking of getting an 250w hps with a cooltube. my tent is a 1.5x2x3' tent. how many feet or inches would the hps have to be from the plants?

best way to tell is by holding your hand beneath the light. if its too hot for you its too hot for your plant. my guestimate would be no closer then 6-8 inches.

hardest thing is finding a cooltube short enough to fit

yeahive seen 21" and 19" i think they would fit. i would have ducting on one side and a fan attached on the other to pull air out.

dank smoker420 said:

i have a 3 foot tall tent and i am thinking of getting an 250w hps with a cooltube. my tent is a 1.5x2x3' tent. how many feet or inches would the hps have to be from the plants?

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that 1.5 m 2m 3m which basically is 2 1 meter squares which means you can run 2 600 watss in there with np. the only time i need cool tubes is in the prime of summer as i drag my air directly from outside..but as long as you run a negative pressure you should have np. i can hold my reflectors when the 600 hps are running and fell no heat on them. or i use 2 of the same tents. is it a secret jordain.

2 600s would be to much for me. i am with a 125w right now. and my temps are at 86. but the light is pretty close. i would want to cooltube just to keep it alot cooler the prime of summer for me is 110 and in winter its around 50-60. i have a lighthouse hydro tent. i am running a negative pressure right now. with one 188cfm duct fan. would 188 cfm be enough for a cool tube?