Aluminum Christmas Trees aren't meant to be strung with lights like other Christmas trees. The heat would represent a bit of a fire hazard and the weight of the light garlands could damage the aluminum "needles".
Instead, what you want to do is get a rotating color wheel to show off how your tree sparkles. The color wheel is composed of a spotlight that has three to four different colored lenses, and as the lights are reflected onto the aluminum branches, your tree will appear to change colors as the light rotates.
