I’ve been dealing with a lot of heat problems too mate since upgrading to a 450W Viparspectra LED. Even with 2 fans going and vents open I’m still staying at 80 degrees F. My girls are loving it,so I’m just going with it. I use a Vivosun 2X3X5’ tent, 9†upper fan, and a 5†tops fan. I even leave my tent unzipped 3/4 with a 1†gap. It would prolly cool down more if I ran my exhaust, but it’s loud af! I still need a riostat for it. Good luck