STRINGLINE from Centersvet

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

STRINGLINE string lighting system from Centersvet

Overhead lamp in the form of a stretched string with an LED strip that shines upwards. The light is reflected from the ceiling.
The length of the tape is possible up to 6, 12 and 20 meters

There are several options in the scene (shown in the secondary previews)

https://www.centersvet.ru/catalog/stringline_system/stringline/?id=49922&temperature=3000&mkey=default

Objects are logically honed, textures and materials have logical names
Texturing UnwrapUVW
Vray materials are obtained by conversion

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