I was going to build some LED pendants but was told it would be more efficient to go with a standard aluminum heat sink. Plus the pendants would have been $$$ as I needed four of them & I'm cheap. Real cheap. O.K. Maybe not that cheap, but I'm pretty cheap. For my DIY LED heat sink I originally used some scrap pieces of 2.5” aluminum C channel I had lying around, but by the time I had assembled the thing, it was surprisingly heavy. So I went back into my scrap bin & used some aluminum bits from a miniature p/u truck tarpaulin display that I saved from a previous workplace. I spaced 1” alum. channel approx.1 3/4” apart inside the 16”x23” edges of the display to mount the LED's on. This piece proved to be much lighter than the first one I made. I constructed a shade made of aluminum sheet which kept the LED's from blinding me when I watched the telly or eventually passed out on the couch.
