[Racefan]

A switch to 600's would be better but that's a cost some can't afford. The 600 is the most efficient light. Ventilation is your only cure. Maybe another ac? I have a 4x5x7 room with 1 1k hps and a light rail and my temps stay at 90 during the hottest part of the day but this is when lights are off too. It gets to triple digits her all summer long on a normal basis. I too have a 10000btu portable.