Using this pendant light is simple. First, have a licensed electrician install it according to the instructions in the box. Once installed, you can use an E27 bulb with a maximum power of 72W and a maximum diameter of 57mm. Remember, it's only for indoor use. To keep it in good condition, clean it regularly with a soft, dry cloth. Avoid using harsh chemicals. If you encounter any problems within the 1 - year warranty period, you can get a replacement.