Fiber Optic Blossom LED String Lights, Plug In, Multi-Color Bulb Type: LED lights with fiber optic threads; Light Count: 20 Lighted Length: 12.5 ft; Bulb Spacing: 8 in; Lead Length: 9.8 ft; Tail Length: 0 ft Wire Color: Silver; End-to-End connectable: No Grade: Indoor Use Only; UL Listed and rated for indoor use only.