https://blackroosterdecor.com/products/tess-table-lamp?variant=47547153711397 
https://franceandson.com/products/valhalla-1-light-table-lamp?variant=41648119283757 

Renders for the preview were made in Corona Render 9. On the model Corona Physical Mtl. Conversion of materials to V-Ray was made using V-Ray scene converter.

"For Corona Render: it is recommended to install version not lower than 1.5, since the glossiness of materials is configured taking into account PBR.

Those who work 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 for you "preferably."