Using these pendant lights is easy. First, have a licensed electrician install them according to the instructions in the box. Once installed, you can use any E27 globe (not included) with a maximum wattage of 72W. They're only for indoor use, so don't try to use them outside. To keep them in good condition, clean the glass regularly with a soft, dry cloth. Avoid using abrasive cleaners as they can scratch the glass. If there are any issues within the first year, you're covered by a replacement warranty.