The 40W NIKA track light with a narrow beam angle and powerful luminous flux provides comfortable and bright lighting that does not distort color shades. A large selection of accessories (mesh filters, blends) expands the lighting capabilities.
The lamp is designed for accent and local lighting in showrooms, shopping centers, office and residential premises. The aluminum body can be rotated by 350° and tilted relative to the horizontal by 90°, which allows you to change accents in seconds.
TRIAC or DALI control available (3-phase system only).

Dimensions: Ø100×135 mm
Color temperature: 4000K
Light flux: 4000 lm
Beam angle: 24°
Color rendering index: CRI>90
Degree of protection against dust and moisture: IP20
Power consumption: 40 W
Power supply: 230 V
Body color: black

https://arlight.ru/search/?q=LGD-NIKA-4TR-R100-20W 

"Who works in V-Ray version 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 - what is preferable for you"