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?



1 Answer 1


1200 watts is a lot of heat - there are a lot of room heaters that put out that much heat. You will need fan that can move a lot of air and some sort of overheat protection to do what you are thinking of doing.

Any chance that you could put the bulbs outside the box and use a transparent side?

  • \$\begingroup\$ How much heat will 1200 watts generate over a 60 min period? The bulbs cannot be placed outside the box as the box is meant to "contain" all light when it is closed.. \$\endgroup\$ Commented Mar 13, 2015 at 4:53
  • \$\begingroup\$ What about all the light 'leaking out' through the fan holes ... ? \$\endgroup\$
    – brhans
    Commented Mar 13, 2015 at 12:46
  • \$\begingroup\$ I thought of using a duct fan so there are no holes \$\endgroup\$ Commented Mar 13, 2015 at 17:50

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.