What are your temps like with that in a 3x3
My temps are about 3 degrees lower than my previous light, an fce3000, however I have the driver for the 4800 outside of the tent while with the 3000 the driver was in the tent. I also am running the 4800 at 75% (plenty of light for the autoflowers I am growing now). My room is 72 and with the light on, the tent is about 81. I wouldn't worry about the temps if you are able to place the driver outside and to be honest, the driver doesn't get that hot. I may have been fine leaving it in the tent. I removed it because of how the light had to be installed. I have my inline fan along the top of the back side, due to how the light wires connect, the light had to be turned 90 degrees (fan is in the way of the support wires). I had a similar problem with the 3000. When you turn the light, it moves the direction the driver faces and I couldn't read the knob. I moved it because it bothered me not because it changed how the light performs.