Crystal lamp curtain is usually hung directly on the ceiling of the lamp through various small fasteners such as round butterfly buttons. Engineering lights are basically installed the same, but they are relatively large. Generally, this kind of lamp will have a detailed installation drawing. If they are not in the package, you can ask the seller directly. Also, if it is an integrated ceiling or a gypsum board ceiling, please make sure that your ceiling can bear the weight of this lamp. There are many lights such as general engineering lights, and the weight increases accordingly. If you have any unclear questions, you can ask them or go to the sky. We are a manufacturer, you can contact customer service directly.