Dome lamp housing only. The bulb is sold separately, so you can pair this housing with the bulb you prefer.
Swapped this onto my old dome fixture and it clicked in without any wobble. Buying just the housing worked out great since I already had the bulb I wanted to keep using. Solid metal, no flex when I tightened the screws.
Wasn't sure about buying just the housing, but it's exactly what I needed since I already had bulbs at home. The dome fit my fixture without any fiddling, and the finish looks way better than the plastic one it replaced.
The dome housing itself feels solid and looks clean on the ceiling. It's a bit annoying that the bulb isn't included, but I actually prefer picking my own.