Using these LED exterior wall lights is simple. First, have a licensed electrician install them following the instructions in the box. Once installed, connect them to a 12V DC power source. They'll start providing great lighting right away. For the best performance, keep the installation area clean and free from excessive dirt. Avoid using them in areas where the temperature goes beyond the -40 to 85°C range. If there's any problem, contact us within the 2 - year warranty period for a replacement. Always check that the IP65 rating is appropriate for your use location to prevent any disappointment or warranty - related issues.