Using this pendant light is easy. First, make sure to have it installed by a licensed electrician as mentioned in the instructions provided in the box. Once installed, you can screw in an E27 bulb with a maximum wattage of 40W. This light is only for indoor use, so don't place it outside. For maintenance, you can gently wipe the powder-coated iron surface with a soft, dry cloth. If you notice any issues, contact us within the 1-year warranty period for a replacement.