I had a 400w hps w/a 6" cooltube in a 18" x 30" x 35" tent and yeah, it was to much. It bleached some the flowers out and with it on 100%, it raised the temp over the intake air temp. I moved it to a 25" x 35" x 54" with better ventilation, lowered the scrog trellis and it seems to be more...