Lamp
Recessed ceiling
Overall dimensions (L / W): 240/190 mm
Diameter: 338 mm
Cutting hole: Ø292 mm
Built-in Depth: 248 mm
Weight: 6 kg

Materials customized, sweeps done.
On obj, apply smoothing for tasks
TurboSmooth ticks Render Iters (smoothing when rendering)
Who works in the V-Ray version lower than SP1 be careful, in the materials in the BRDF section there is Microfaset GTR (GGX), if your version is older than SP1, then the BRDF field will be empty. Put Phong, Blinn, Ward of your choice.

Other models in my profile - https://3dsky.org/users/evdokimov2209/models