Led corner light designed for a specific LED track.

Parts 2x LED corner track https://www.amazon.com/dp/B07ZB9LWM6 I went with the 2m long one. 4 Meters of Led strip SK6812 or WS2812B I used 60 LEDs per meter and you can see dots. Controller ESP32 Dev board 4 M3 bolts and heat inserts. 4 M2 bolts and heat inserts for the controller board. Could get by with only 2. Barrel connector Power supply Wires and Fuse.

You could fill the space with some weights to make it more stable.

I use WLED to control the esp32.