I actually use both! Colored lights go in deep on the branches, sort of like behind the scenes, then the white ones out on the "surface" of the tree. (This keeps the white light from shining through the colored bulbs,) So all I really have to do is plug in the right string of lights, and I can have colored OR white. Or BOTH. (It's a 3 ft. tree.) Nearly no wattage when you use LED lamps. Takes some extra time, but at least I get a choice, and it blows my friends away...
Friend: Hey Wolfie, wasn't there white lights on the tree before I went to the can?"
Friend: "Then why are there colored lights on it now?"
Wolfie: "You must be shroomin'!"
My next trick, is to decorate two trees "Differently". Then while my friend is in the can, I'll swap trees on him, and he'll think he's lost it.