My other models:
https://3dsky.org/users/o-wal/models 

Ceiling with titanium embossed lacquered steel (GFM11) and satin Nickel.
Small lampshade in borosilicate transparent glass big lampshade in borosilicate fume glass.
Integrated LED light.

Manufacturer: cattelan italia
Country: italia

OVERALL DIMENSIONS:
700x1380x2000 (max hight) mm
Link to the manufacturer:
https://www.cattelanitalia.com/en/products/489FF5AF-6559-44F6-9F1A-99B77AD58CA8?c=new 

XForm: Yes
Model Parts: 1
Render: Corona
Formats: 3Ds Max 2014 FBX

The stack is not collapsed.
For Corona render it is recommended to install a version not lower than 1.5
since the glossiness of the materials is customized to fit the PBR.