did you work it out? i have a stair with 16 steps. u use 36 leds ea step. so a total of 576. i use a arduino uno rev3 with a 5v 40ah power supply. but if got the codes from https://www.instructables.com/id/LED-Stair-Lighting/ but when i insert al my leds it doesnt work anymore. when i use 548 it works. can u share your code with me? maybe that works. or maybe you know a solution?