The clock is built from two Adafruit Neopixel rings, each with 60 LEDs. These are mounted on a 3D-printed shield that directs and softens the light to create the time elements.

That’s what [bitluni] did with his massive 1200-pixel LED video wall, which he unveiled at Maker ... a mere 300 ping pong ball ensconced-LEDs on a large panel. You may recall his travails ...