Cooling Grow Tent

Hey,

My tent is at 32 C after installing the new 600 W HPS.
How can I cool it down, I have one small fan and an exhaust fan.

one of the plants seems to be dipping its head because it's too hot, I have moved them over to flower from a 250W CFL, could this be due to temperature shock?

Portable ac? bigger exhaust fan? new hood for light? My suggestion would be some sort of portable ac with a timer to run when the lights are on.

It's 34 C now, is this way too high?
Or will the plants adapt?