We also have to string lights on a fake tree. One of my favorite tricks, as mentioned by steph, is to run lights on the center pole. This really brightens up the center of the tree and gives it an overall glow! Try a string of C7s for extra light. Also, I run a 9-outlet extension cord up the center pole. As I string lights in the branches, I can plug them in conveniently instead of trying to get ends to reach down to the wall outlet or power strip.
I also mix in several strands of twinkling lights (multi-function lights) to give some extra brilliance.
