Twinkle Icicle Light Set, 8 of 100 lights twinkle, UL Approved, 5.5' of Lighted Length, Connect up to 4 Sets End to End 8 of 100 lights twinkle, Connect up to 4 Sets of this same set end to end UL Approved for Indoor and Outdoor Use 5.5 Foot of Lighted Length, 18 drops Drop Sequence in number of Lights: 7,4,6,7,4,6,7,4,5,7,4,6,7,4,6,7,4,5 Includes the following replacement bulbs: 2 Twinkle Bulbs, 2 Clear Bulbs, 1 Spare Fuse