Can't get my temp below93F!I've put one ...

for such a lamp there must be a fan of great power

Hey man, first off the way you have set up your light looks pure dangerous. If your going to use tape to hold it all together you want to use the right tape. Insulation heat proof or reflective tin/aluminum tape. There is a lot of variables which determine how much heat you produce. Where your tent is located, is it in a basement, cupboard, garage, room in your house. Have you got fresh air coming in from outside or is it straight from the same room you’re tent is in... loads more too many to list without making the IMPORTANT POINT too much light/heat is no good. In that size tent 250w is fine 400w is perfect if not pushing it slightly. look at my fast and vast grow that was 2 plants 184g from 400w... now I got an LED for the summer