Author’s composition of pendant lighting made of flexible neon FREELIGHT from Centrsvet
for spaces with high ceilings or a second light
Dimensions: 2650*140*2450 mm
Module link:
https://www.centrsvet.ru/catalog/freelight_main/freelight_r/ 
Tube diameter 25 mm
To create holes in the ceiling use auxiliary cylinders by adding them Corona distance for the ceiling material

Polys: 89704
Verts: 90406

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

Those who work in V-Ray versions 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 – whichever suits you best