[AceT9]

I was wondering if it is possible to grow 2 plants in a 18 in by 18 in by 30 in. I plan to veg with 1 42cfl, and 2 25 watt cfl with equals like 6000 lumens..and then flower with a 400 watt hps is this possible in my grow cabnet

P.S. the plants are Rox

[darrinjefferson]

i dont think that in a cab that size you can put a 400 watthps. i am just starting to build my first hps cab but i know thats too much light. you should look at a 150-250. just my 2 cents.

keepitreal keepitgreen
darrinjefferson

[AceT9]

so you think i shouldnt ..i planned on taking the reflector off and then having a shorter mylar build reflector that i made.. in there...or will it just get to hot in there.....I put in a 6in arm and then put a 6in in line fan...

[Suki]

1 sq foot needs like 5000 - 6000 lm

so 70 hps is 6000 lm
400 W outputs 55000 it is way to much for that room

[bounty29]

Grow courtesy of sunnyside

600 watt light
90,000 initial lumens
2x3 overall space
1x2 used for hydrogarden
100 watts per square foot of garden space
15000 lumens at top of plant
3750 lumens at base of plant (roughly)
151 grams total dry weight = 75.5 grams/per foot

A later grow with the same setup yielded 200grams.

That grow was using 100 w/sq.ft and 15000 lumens/sq.ft of garden space.

A 400w HPS in your area would be 178~ w/sq.ft and 24,444 lumens/sq.ft for your total area
A 250w HPS in your area would be 111~ w/sq.ft and 14,667 lumens/sq.ft for your total area

If you can cool a 400w, go for it, but I doubt you'll be able to and have them close enough to the plants. A 250w should be more than enough. I'm sure you get a better grams per watt yield if you used the 250, but you do what you want, and whatever you decide, I can't wait to see it.

[sproutco]

I assume 30" is your height. You want at least 50 watts per square foot of hps. (overgrow facts) 1.5' x 1.5'=2.25 square feet You would want a 112.5 watt bulb so get the 150 hps. You will have to get ventilation like a micro fan if the box is sealed up.

[AceT9]

I planned to put a Master Flow 6in. elbow and then put a 6 in. in-line duct fan inside..would that be good enough ventilation?

[sproutco]

6" fan sounds like plenty to me but I am not sure. Larger the lamp the more heat will be generated. Go with the 150 w hps.