1. some "dots" are 0.9" and some are 1" - what is the difference between them? flush mount (0.9") vs with a trim ring (1") maybe?
2. i see these are 3 wire - are they SK6812/WS2812B LED chips so I could use a WLED Compatible controller (I understand no warranty but I want to animate them)
3. what is the difference between "stair" and "up/down" types? do they also have different numbers of LED's?