I'm looking at creating (at least) 8 spiral mini-trees with RGB-basic ribbons. So according to the "RBG for Dummies" manual, each 5M strip will need about 36 watts (5W/M) so, changing around P=IxE, current would be P/E, and for 12V strip, that's 3A per strip. Am I right so far? If I am, then I need to look at controller choices. My planned was the centralized approach, so those cheap $6.00 decoders can carry 4A. so I'm good, right?. It looked like most of the multichannel controllers maxed around 2A per channel, so they probably wouldn't be an option for this part of my project. That I'm OK with. Now for power. I'm assuming I either get 8 of the $14.00 12V supplies since each only handles 45W , or possibly a MeanWell 350W and split the power among the 8. Cabling aside (i.e. separate lines vs injection into CAT4) am I on the right Math Track?