Heart shaped frame for a WS2811 Pixel 50 LED Light String. See https://www.amazon.com/gp/product/B079NH6M7X/ref=ppx_yo_dt_b_ . Uses my unique locking system to hold bulbs in place. You have to use a micro-controller to program these strings. I use the Parallax Propeller 2. A sample of my code from a previous project can be found here: https://forums.parallax.com/discussion/174205/christmas-tree-for-those-50-led-pixel-strings .
The author hasn't provided the model origin yet.