84 is ok if the plants look ok, and they look awesome! cannabis can take up to 90 for short periods of time, 1/2 - 1 hour or so I think. that depends on the strain a lot too though.

right under my cool tube the thermometer reads 32-34 C (89-93 F) most of the time, sometimes less and sometimes more, especially when the door is open. but if you put your hand there you can tell it's not that hot where the plants are. anyway it is probably near 30 C (86 F) where the tops of the plants are and they look ok so I am not freaking out. I will get a fan when I can, but I say if the plants look ok then I won't sweat it if I have done my best!

I think greg green said that root temperature is most important, and that is just fine so yeah...

-c :jointsmile: