thanks again mammath for those words of experiance, i was unsure as to the 600w myself and i got rid of my 400w so it looks like it will be a 250w grow through out. just 1 thing though will i get decent bud density with the 250w ?
once again thanks
Shit I'm doing math and it's killing me.
Your space is 900 x 900 x 1250mm?
3 x 3 x 4'H for all imperial?
That's 9 sqft of area with 4' of height?
If you had a little more height you could vent a 600w but with such limited vert' go a 400w with those ambient temps.
Good ventilation is really important so suck as much heat off the bulb as possible.
250w will not be enough lumens for those sqm's, sorry my mistake with my math...
If you gotta buy a bulb, get a 400 and work around it.
You will have to grow with style though to suit your limitations.
Scrog or LST, flower early etc.
It's all good fun dialing in a new set up though.