Hey buddy. I had a similar prob with my led light, not as extreme of course, but the driver was causing tent to go up by like 2c when lights where on. And the top driver/balist use to be sooo hot. I have a fan that blows in air with the ducting, and I moved the ducting so it more or less blew it's air over the light and into tent, tent would still expand fine with AIR. This will help cool down your bal massively you'll notice the dif after 30mins. DM me if u need me to explain more. But basically set up the end ducting, either afix it and the it from a bar in the top of your tent or the it off so cold air blows in and hits your set up first. Worked for my 2c prob. I know it's dif but cold air is cold air. Happy growing.