Features Commercial string light sets include bulbs and light strings; to assemble, simply twist bulbs into light sockets Commercial incandescent strings lights are rated for an average of 3,000 hours Commercial string light sets provide quality lighting with professional style Rated for an average of 3,000 hours Removable bulbs provide flexibility for easy replacement Triple dipped coating reduces fading and chipping Weatherproof nickel plated bases prevent corrosion, ensuring bulbs stay lit even in inclement weather Sockets are designed with weep holes, improving performance in wet conditions. Specifications Base bulb size: E12 - Candelabra Bulb Shape: Teardrop Light Display: Flicker Flame Wire Insulation: SPT1 Voltage: 130 Watts per bulb: 3.5 Usage: Indoor / Outdoor Wire Color: Black Bulb Type: Incandescent Voltage: 120 Removable Bulbs: Yes Light Display: Flicker Flame Rating: UL Recognized Components Grade: Commercial Wire Gauge: 18 Average Hours: 3,000 Bulb Shape: Teardrop Light Color: Clear Bulb Material: Glass Base Material: Nickel Bulb Technology: One goes out the rest stay lit Male Plug: Polarized, Fused 5 Amp Bulb Size: C7 Bulb Diameter: 7/8" Bulb Voltage: 130 Bulb Finish: Transparent Watts Per Bulb: 3.5 Wire Insulation: SPT1 Light Count: 25 Bulb Spacing - Inches: 12 in Lead Length: 6 in Tail Length: 6 in Female Plug: End-to-End String Length: 25.0 ft Base Bulb Size: E12 Max Sets Connected: 2