I'm not even sure what a mega tree is. Anyway I've decided in for a penny in for a pound. I think I want to do a 180 degree pixel tree. In case my terminology is all wrong I want to do a 2d tree. Not sure how tall or how many strands yet. Need to do a budget first. My question is:- Is it okay to use 12v strings with 3 led/pixel or do you get a better result with 5v strings due to the greater pixel density. I suppose I am asking how many pixels per metre is required to look good and give some flexibility in operation.