Hi, I am wanting to create a pixel matrix which will be 1200mm x 1200mm and the I will be using WS2811 bullet pixels from Ray Wu spaced at 50mm apart. I am having some trouble working out how to calculate how many power supplies I will require. I am almost 100% confident that my calculations are incorrect. Where I have written "power" is where I plan on power injecting. Can someone please help me out here? Based on the attached drawing, below are a few questions I need answering and possibly explain how you got to this answer so I can better understand. Do I have the number of channels correct? How would you get Ray Wu to make up your pixels for this? What is the total light load and how to calculate? What strength power supply to use? Would you consider 5V a better option for this and why?