Christmas light installation is not something to be taken lightly! It’s easier than you think for wires to become crossed and bulbs to be broken when performing this process yourself. Plus, professional Christmas light installation services are more skilled at running power cords neatly between two or three branches of a Christmas tree or through walls – if they’re doing it right, you’ll hardly ever notice them there. This way they can create cleaner lines and sharper shadows with electric lights (and no tangled extension cord).