 It took of incandescent lights (containing 225 small bulbs) and about 50 ornaments to decorate each state tree in 1999.By 2008, after the switch to LED lights, it took six to seven strings of clear LEDs lights to decorate each state tree.To provide electricity to the National Christmas Tree and all the trees in the Pathway of Peace, up to of electrical cord was laid in 2000 — all connected to an underground electrical system.