Thank you all for the complements.
No, actually these are just regular 5V WS2811 60/m LED strip cut apart and then spaced out to 3.5 inch spacing using strands of cat3 (same wire as cat5, just less effort to unwind them). It was somewhat tedious, but much less expensive to cover a larger area this way. (later I did find a place that actually makes LED strip with 10 cm spacing, but the DIY approach cost less money). Then I put the pixels back in silicon tubes and when I mounted them I pointed them backwards so they act like miniature spot lights shining onto the garage door surface.
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This was a "technology refresh" of an earlier version which is described here:
http://downloads.eshepherdsoflight.com/Howidid-DumbRGBPixelGrid.pdf
I prefer this style of gdoor grid because it's practically invisible in the daytime from several feet away (and totally invisible hardware at night), and the garage door is still operational (even when the lights are running). This time around, I used WS2811 instead of chipiplexed LEDs. The cut up pieces of LED strip make great little PCBettes, and were a lot easier to work with than bare LEDs. I also mounted the controller and power supply on the back side of the door this time, which made the front appearance a lot cleaner than how I did it the first time around.
don