When adding an HID light system to the inside of a grow tent, it is often hard to keep the temperature down. This can be easily achieved by cooling your light - simply add an air cooled reflector and attach it to an inline fan and ducting (shown here). When you pull cool air from outside of the room, through the bulb, and out the other side, the heat from the bulb never enters the grow room making it the perfect environment for your plants!