How many watts do I need

meerkat67

Active Member
I’m growing in a 2x2x2 (metre) tent. Have 14 whit widow plants I’ll be growing, will 3x 600w hps grow lights be too much in this?
 

conor c

Well-Known Member
I’m growing in a 2x2x2 (metre) tent. Have 14 whit widow plants I’ll be growing, will 3x 600w hps grow lights be too much in this?
2 lights would do it i think u gonna struggle to vent it fast enough in such a small space with 3 or 4 600 watt hps lights man are they adjustable power wise or?
 

conor c

Well-Known Member
Have an A/C unit.. when I’ve done it before I can manage temps of 25-26c lights on.. just wondering if it’s too much light. 4x400watt hps be better suited?
Depends what your growing haze or deep chunk would hate that much light direct skunks and other stuff love it
 

meerkat67

Active Member
Depends what your growing haze or deep chunk would hate that much light direct skunks and other stuff love it
White Widow, the only thing I’ll note is more to the point I’m asking is. I had issues in the past with foxtailing and I’m wondering if it’s light intensity, I’m sure if it was, I’d have signs of bleaching or damage to leaves and I didn’t.. only thing I can think of is high temperatures on a couple of occasions? Leaves looked pretty good all the way through, they just started growing rounded leaves and shooting new growth and took ages to ripen..
 

TCH

Well-Known Member
White Widow, the only thing I’ll note is more to the point I’m asking is. I had issues in the past with foxtailing and I’m wondering if it’s light intensity, I’m sure if it was, I’d have signs of bleaching or damage to leaves and I didn’t.. only thing I can think of is high temperatures on a couple of occasions? Leaves looked pretty good all the way through, they just started growing rounded leaves and shooting new growth and took ages to ripen..
Sounds like light/heat stress and maybe a little revegging.
 

TCH

Well-Known Member
what causes revegging? I’ve got my A&B nutes low so it won’t be too much nitrogen I wouldn’t think..
As far as I know, light schedule. I wonder if the lights are way too intense, if that would drive the DLI up to a level that would cause the reveg even if they are on a 12/12 schedule?
 

meerkat67

Active Member
As far as I know, light schedule. I wonder if the lights are way too intense, if that would drive the DLI up to a level that would cause the reveg even if they are on a 12/12 schedule?
Yeah, I might turn them down to 400w (1200 total).. pull temps down to 23 lights on 19-20 off and see how I get on.. reckon that’s a good starting point?
 

conor c

Well-Known Member
For sure, I don’t believe I had that issue.. don’t think I have any light leaks either but something to look into..
Light leaks will cause herms but it need to be one hell of a light leak to cause reveg my moneys on the timer before anything else if it was a reveg issue
 

meerkat67

Active Member
2x2 is 4 square meters.
A single 600hps is weak over a 1.2 x 1.2m space but great over a single meter squared.
So 4x 600w hps. Assuming you are growing in the whole tent and not 75% of it.
Growing in 95% of it.. only thing I can think it would be foxtailing for would be heat stress?? It never gets above 28c but on occasion may have?? So if I bring the 3 hps down to 400w instead of 600w I’ll have much more play with temps. I’ll run 23 lights on and 19-20 off. Reckon it’s a starting point to stop it?
 
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