This item has been used for about a year. It's a clip-on sun lamp that provides UVB irradiation to support the health of birds. The screw connecting the clip and the light has come off. The screw itself is present, so it can be used if you reattach it. However, as a novice, I am unable to do so, so please do it yourself. In that case, there may be a gap between the screw and the nut, so please prepare something to fill the gap (such as a washer) yourself. However, if you use it by placing it on top of the cage without using the clip, it can be used without any problems. - Product Name: Sun Lamp - Purpose: UVB light for birds - Features: UVA/UVB irradiation possible - Design: Clip-on for easy installation - Heating Function: Solves the lack of sunlight Thank you for looking.