All 8 strands are separate, if you check out step 3 you'll see the setting up the fadecandy board to drive each strand individually, the initial reason i did it this way as the length of each strand is limited to 64LED for each of the 8 outputs. But it had the added bonus of making it easier to hang the lights in such a way that allowed easy mapping to the tree rather then one big long strand, also no worries about voltage drop over the entire 400 LED's.
Super Christmas Tree Lights
Super Christmas Tree LightsView Instructable »
Faucet Night Light