120V UL, M5 Warm White LED Christmas String Lights

LED - Consistent Color & BrightnessWide Angle LED, the light glowing from the led is uniform.Specific color Kelvin temperature range avoids color differences between lights.It makes the color consistent.Thick but Flexible WireThis led string light is made of insulated copper core wire - 22 Gauge which is UL certified. It is thick and sturdy, but flexible, and not easy to break.IP64 - Waterproof for Outdoor UseIP64 Waterproof rated, patented one-piece sealing bulb makes it possible to prevent water or moisture from getting into the cap.It is a good choice for both outside and inside.UL Plug - End to End ConnectorMax 40 sets (each set with 50 leds) can be end-to-end connected. UL Certified (UL588)This cool white led Christmas light is completely UL certified (UL588), we promise 2 years warranty. Why are the bulbs not replaceable?Generally speaking, commercial grade LED Christmas lights are made using a one piece design. Although it does prevent the bulbs being replaced, it prevents dirt and moisture getting into the bubls. One piece structure creates a sealed bulb and socket, that LEDs last a very long time, it's rare that one bulb burns out or the light set fails.How is the quality of your product controlled?All the raw materials are tested, and we have Semi-finished product test and finished product test to make sure high quality of our products.