Abstract: A decorative light assembly for illuminating a tree includes an electrical cable having primary input and output conductors, a plug at one end thereof, and being adapted for placement within the tree about the trunk thereof. At least one light string cluster stems from the electrical cable and includes a plurality of looped components adapted for extending along the branches or subbranches of the tree and electrically connected to one another, and a plurality of bulb sockets electrically connected at spaced intervals in series along the respective looped components. The looped components and bulb sockets together create a dense distribution of lights in the tree when the looped conductors are extended along the branches or subbranches of the tree.