Thanks for helping out Baja, sorry it took a while to reply, I was a bit too stoned to take pictures last night. My mate who rolls em really strong came over for a few hours and that was it for the night lol.
I shortened the ducting from the fan to the cool tube and from the cool tube to the outside to help, I have attached photos before and after.
Temps today are actually a bit better they've stayed 82-86F all day.
Do you think my setup looks ok or do I need to change anything? I probably bought the wrong venting kit, it's only a 5" 250CFM RVK fan + Carbon Filter kit, I should have gone for the 6" kit which was 430CFM and would have helped loads
I'm thinking about getting a 400w ballast & bulb to put in, do you think that would help the temps much? It's the one you're supposed to use with the 5" kit I think, more cash but my friend will probably buy the 600ww from me in a month or so, when he gets set up again.