I try to prop my dig thermometer as close to the top of the plant that is closest to the light. I also move it around a couple times a day to monitor the different temps in the box.....less hot spots...

Work on the fans! you should be able to get it cooler than 85 in there!
Login Failed Reviewed by Login Failed on . Temperature/Cabinet Concerns :) The cabinet is 3x3x5 or 45 cubic feet. The lamp is a 430 hps with cool vents. I have a 240 cfm fan hooked up to the lamp. I also have two 80 cfm to vent out the cab. I have passive intakes for both the lamp vent in and the cabinet vent in(one each). The duct work comes out of the passive intakes and connects to a "y" which then goes to a single duct tube which then goes to the outside to draw the air into the box. Even though it is a nice 65-70 degrees outside the temps in the box are Rating: 5