Made according to the photographs and dimensions of the manufacturer
https://www.finnishdesignshop.com/lighting-table-lamps-table-lamps-mosaik-table-lamp-white-p-37451.html 

https://www.finnishdesignshop.com/lighting-table-lamps-table-lamps-mosaik-table-lamp-black-p-37437.html 

Dimensions:
height 47.4 cm
width 17 cm
depth 17.8 cm

There are 2 copies of the model saved in the scene, each with its own adjusted material, two colors - black and white.

On the model in the scene, the Turbosmooth modifier is assigned in the Render Iterations = 2 mode, which is applied only during rendering.
In the obj file, the model is saved with the applied Turbosmooth.

All objects have normal names.
All materials have convenient names.

Model weight without Turbosmooth:
1596 polygons
1658 vertices

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 - which is preferable for you.

For Corona render, it is recommended to install a version not lower than 1.5, since the glossiness of the materials is adjusted taking into account PBR.