Is it the JB Weld or the bolt and nut?
Like
this?
I have some 1" square aluminum tubing stock left over from rebuilding a trailer. Perhaps I can use that to build a light, and make the whole body the heatsink. Hmmm...
I think I have some of that DX glue. Its likely much better than JB for heat transfer.
1 inch aluminum makes a decent housing. I've used it on a bunch of lights.
Here's a pretty simple one.