Fiber optic lighting works differently from a strand: the color travels up the filaments and changes at the tip, so the tree cycles through hues on its own with no bulbs visible in the branches. This 6 ft spruce carries 617 tips at a 3.3 ft width and weighs 16.5 lbs. Branches are stiff enough to hold ornaments despite the optical fibers running through them. With no strand to tangle or fail, setup is a matter of standing it up and plugging in - a practical choice for an office, a rental or anyone tired of testing lights each November.