The luminaire for three-phase tracks is used for lighting public, commercial, and exhibition spaces where it is necessary to quickly and easily change light accents.
One type of luminaire — and at the same time a very flexible accent lighting: 5 options for color temperature, 2 power options, and an adjustable beam angle allow you to customize the size and shade of the light spot for optimal emphasis in a particular area. The side mounting of the light module increases the tilt and rotation angle of the body, expanding the possibilities for accent lighting.

Size: Ø75×255 mm
Color temperature: 2700/3000/3500/4000/5700 K
Luminous flux: 1140–2075 lm
Beam angle: 20–50°
Color rendering index: CRI>90
Degree of dust and moisture protection: IP20
Power consumption: 18/25 W
Power supply: 230 V
Body color: white, black

https://arlight.ru/search/?q=LGD-URANUS-4TR 

"Those working in V-Ray version lower than 3.1, please note, 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 is preferable for you."