I am building a custom box from wood (around 14 inches by 10 inches by 10 inches) to encase 3 high energy Metal Halide Bulbs (400+ watt each). The box will be opened and closed intermittently, automatically. It will be closed for a maximum of 60 minutes straight. When the box is closed, the lights will remain on.
This will of course generate a lot of heat when the box is closed and I understand that I need to some take precautions to filter out the heat from the box.
Right now I can think of having a few holes in the back of the box and using a powerful fan to "drain" out the heat.
Furthermore, I am thinking of treating the walls of the box with a flame proof liquid.
Are there any other / more efficient ways to drain the heat from within the box?