To use this pendant light, first, make sure you have a licensed electrician install it following the instructions in the box. Once installed, you can screw in an E27 bulb (not included) with a maximum wattage of 72W. Since it's for indoor use only, don't place it outside. For maintenance, you can gently clean the powder-coated aluminium shade with a soft, dry cloth. If any part breaks within the 1-year warranty period, you can get a replacement. Also, always be careful not to touch the bulb when it's on to avoid burns.