Corona version 9
The model uses materials that may not be displayed correctly in very old versions of the engine.

Two Freelight Line light compositions from Centersvet
(!) The model has controllers – You can change the position and length of the neon tube along with the ceiling mounts adapting the lamp to your space.
There is also a version of the lamp in the scene translated into editaible poly
The export file contains only the non-editable version!
Freelaight Line is a flexible neon lamp that can take any shape from Centrsvet https://www.centersvet.ru/catalog/freelight_main/freelight_c_horizontal/ 

The scene features two original compositions that can be used both separately and together in a common composition
Tube diameter 25 mm

Objects are partially attached textures and materials have logical names
Texturing UnwrapUVW

For Corona render it is recommended to install a version not lower than 1.5 since the glossiness of materials is configured with PBR in mind

Who works in a V-Ray version lower than 3.1 be careful there is a Microfaset GTR ( GGX) in the materials in the BRDF section 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