Awesome writeup. And thank you for following up on my post. I like those lights as they have enough metal to transfer the heat away from the LED. I have seen some home made versions where they drill out the plastic plug and silicone the LED in place. Those a bit dubious for my taste both in heat transfer and seal.
Now what is a "Bought Drain plug block from Home depot $1.50" and why did you need it?
I went into their plumbing section and found drain plug stopper. The only reason, I put it so their no air leak or something. If you look at the picture, I've black rubber between the plug and fiberglass. I just used it to be extra careful (can't say NO my DAD when it comes to this kinda stuff HAHA)
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