Originally Posted by Tinc Tank
those LED rope lights
There is a wide range of LED tape available, some of which would be suitable (SD panels use LED tape, and are very good lights). Unfortunately, most of the offerings commonly available (on Amazon, etc.) don't list watts, lumens, color temp, or really any useful information other than price and how cool your backyard barbeque will look when you have these flashing different colors.
Here's some -- apparently -- good strips.
There would be a lot of research necessary in order to build something that's actually functional, and it isn't clear that there would be any savings vs buying something of a proven design.