You can see in the first photo the aforementioned lantern and below it are the two micro LED strands. You can see the LEDs are on copper wire and each has a battery pack connected. The battery is a 3v disc type (I believe they are called cell or watch batteries) and come already installed in each pack. You just have to pull the clear plastic tab on the battery pack to allow the battery to come into contact and be able to power the LEDs. When turned on, as you can see on the right, the LEDs are quite bright. I even had my flash on for these photos. They are definitely the warm white light that is listed. And they don't heat up at all when on for an extended time. The switch to turn on the strand is just a simple toggle on off switch. I'm sure someone with knowledge (or me if I pester my electrically inclined friends) could figure out how to hard wire the LED strands to a switch which would make turning the lantern on and off easier.
To truly see how bright these LEDs are, on the left is a photo taken with flash. On the right is the same set up but with the flash off
My plan is to place the LEDs in a way that makes the branches look like they have party lights strung in them. And, of course, it would make the artwork easier to see.