Set of 50 Mini Christmas Lights Item #ES66-470 Color: Multi-Color Bulbs/Green Wire Number of Bulbs on each string: 50 Bulb Size: Mini-Bulb Spacing Between Each Bulb: 3.5" Lighted length: 14.5" (4.4m) Total String Length: 17" (5.1m) Steady burning or single flashing UL listed for indoor and outdoor use 120V, 60Hz End-to-end connectors allow you to connect multiple sets together For a well lit tree, it is recommended to use 100 bulbs per foot of tree height