Tekna Brooklyn wall light with outside mounted frosted glass, closed top and open bottom.
The closed top is also the base for electrical equipment.
https://www.tekna.be/products/nautic/brooklyn 

Dimensions:
W x L x H (mm)
310x490x530

Polys: 20 360
Verts: 20,396

For Corona render, it is recommended to install a version of at least 1.5, since the glossiness of materials is configured taking into account PBR