The surface-mounted luminaire with a round body with a diameter of 505 mm is the ideal solution for illuminating common areas. The minimalist design does not draw much attention to itself, because the main advantage of this lamp is its light.
Due to the high color rendering index and the absence of pulsation, high-quality lighting is created. The matte shade makes the light softer and more pleasing to the eye.
When installing the luminaire, you can independently adjust the color temperature: 3000, 4000 or 6000 K (the switch is located inside the housing).

Dimensions: Ø505×85 mm
Color temperature: 3000/4000/6000K
Luminous flux: 4600–5100 lm
Beam Angle: 140°
Color rendering index: CRI>80
Degree of dust and moisture protection: IP40
Power Consumption: 50W
Power supply: 230 V
Body color: white

https://arlight.ru/search/index.php?q=CL-SMURF-R500-50W 

“Those who work in V-Ray versions lower than 3.1, be careful, in the materials in the BRDF section there is Microfaset GTR ( GGX ), if your version is older than 3.1, then the BRDF field will be empty. Choose Blinn, Phong or Ward - whichever suits you best"