2x2 tent grow; lighting maxinums?

[b1kerac3r]

im about 2 weeks out from flowering and im using a 250MH

my debate is to stick with a 250 but HPS bulb or can i get away with a 400hps?

right now i have 3 different thermometers in the tent. one reads about 72 next to the intake, other reads 78 and final reads 76.

what would you expect the temps to rise to if i went to 400w?

its a 2x2 tent with two of the three "access ports" on bottom open but none of the three mesh screens spots opened up.

i could open more but i need to keep the negative pressure in the tent.

im using a 120cfm exhaust fan with filter and passive intakes, that would possibly be opened more.

 

[vitamingreeninc]

Would need a bigger outtake and a active intake to keep it cool I believe. Instead of the HPS I would go LED. That's what I did personally and it rocks equal to that 400 but way less cost electricity

 

[b1kerac3r]

Would need a bigger outtake and a active intake to keep it cool I believe. Instead of the HPS I would go LED. That's what I did personally and it rocks equal to that 400 but way less cost electricity

what led do you run?

 

[vitamingreeninc]

onyx Bloom, love it. I would go with that or A-51 the 150w or There is a guy on here, named Hush, he has a calilightworks solar flare in his.

 

[b1kerac3r]

very intriguing..... second run i think

im going to stick out the 250 and see what i get. stupid simple is my game plan, i have it dialed in with that so why change it up