I tried not to go over 82 degress. I keep my temp between 72 to 78 deg. I'm not familar with co2 application but you can have exhaust connected to your light. which mean you connect a flex tube from an outside air to the light & then on the other end connect a flex tube to your exhaust(if you have an enclosed light fixture). it reduce the heat of the light quite a bit. & with fans in the room you should be fine.