Save money on energy-efficient string lighting. These red LED String Lights include 60 indoor/outdoor lights, on a 16.5 green string (lighted length 15.5). Increased illumination and casts light further in all directions. Connect up to 42 strings end-to-end. 4 spacing between lights. Bulbs measure 1/4 x 3/16. Bulbs do not burn out and never need to be replaced.