The Dominator XXL is the best air cooled reflector we know of.

The Dominator XXL is the newest air cooled reflector from Sun Sysyems. It is an extremely well made air tight reflector featuring a 95% reflective aluminium interior, it has a wide, even spread of light allowing a great coverage for your plants.

It has 6″ 150mm ducting ports and an aerodynamic design allowing for a more effective cooling.
For use with 600w – 1000w HID lighting.
Dominator XXL Air Cooled Reflector 150mm