I want to thank everyone that helped me with the heat source questions of the last thread I posted. I ended up using 18 inch bar under cabinet lighting. I installed four 18 inch bars with 3 twenty watt halogen bulbs each. Hopefully this will bring box to temp. Only question is what temp should I bring it to. I have heard 70, 72, 80, 90 and over 100 degrees. I am now using pro kote which requires a minimum of 72 degrees. Is there any advantage to going over say 75 degrees other than drying time? Thanks everybody!

I wouldn't go too high. You don't want to re-thin the epoxy once it's started to set nor do you want to quicken the set time so much that the product doesn't have sufficient time to flow out.

Somewhere in the 75 to 85 degree range should be fine.

................

X10 on Mr. Kirkman's comment's.

It might make sense to install a thermostat in your dryer box so that you can use it to regulate your temperature.

Unless you are really in a cold area, I am guessing that you have way too much heat for your drying cabinet.

You have 3-twenty watt bulbs per fixture for a total of 60 watts per fixture.
Then, you have 4 fixtures for a total of 240 watts.

I suspect that 60 or 80 watts would supply plenty of heat. Perhaps - one 20 watt bulb per fixture might be just right. I suggest that you do some test runs with a thermometer in the box so that you can display the ambient box temperature.

Start out with 1 bulb per fixture and let the box run for 2 hours at a time and see where the temperature settles. Then, try 2 bulbs and three bulbs if necessary.

---------------
I have a few friends that use 3-25 watt bulbs in the box and find that the 75 watts does a very nice job of keeping the box at a nice stable 80 degrees.

I generally dry at a temp of 75 to 80 degrees.

Be safe
Roger