An updated series of pendant LED luminaires in the form of a ring or an oval on an elongated cylindrical body Lampatron RING

Diameter: 200-160mm
Height: 1000 mm

Polygons: 115264
Vertices: 57664
Turbo Smooth stack is open

Those who work in V-Ray versions 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. Choose Blinn, Phong or Ward - whatever suits you best.

https://www.lampatron.ru/cat/item/design-lamps-ring/