More info
I switched my intake to just a single tube and not coming off a "y". The temps still hovered above 85. I was worried about negative pressure so I did a test. I turned off the lamp and the temp was 88.9 on the thermo. Within 90 seconds the temp was down to 73 and at two minutes 71. This also was about a degree above the ambient(outside) . Also I tried both fans on the lamp duct the 240cfm and the 80 cfm-Same result????? So suggestions suggestions suggestions please. :dance: Do I need to add another intake? Do I need to make a cool tube and do away with the cool vented hood? or what ?

A recap.
I have a 240 CFM and a 80 cfm duct fan for the exhaust. The exhaust size holes are 3" and 4". The intake into the cabinet is 6" and receives fresh air from outside. The lamp has a 4" intake and a 3" exhaust-there is a 80 cfm sucking the duct work from the lamp and the getting fresh air from the outside as well. OH the box is 45 cubic feet 3x3x5.
Peace to All -:dance:
kind67 Reviewed by kind67 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