Warm Tips: 1. The string lights are pre-programmed plug in lights, cannot work with other bulbs or connected to solar panel! 2. Please tighten each bulb before use. If the string lights not working, please check if all the connecting parts are connected properly. 3. If an individual bulb does not light up, try wrenching the copper inside the socket out a little bit so that the copper makes good contact with the bulb. The string light connection with female connector and male connector is purposely designed to not be a 2 prong plug, which is more stable, better waterproof, and avoids connecting with others light strings leading to string failure. Please plug in circular connection "arrow" to "arrow" Multi-functional Outdoor String Lights with Remote: Our 48 feet led string lights include 15 hanging sockets, 2 remote controls and 2 spare bulbs, retro Edison warm white LED bulbs with 3.15 ft bulb spacing, creating a soft and cozy glow to your space. Easy to control th