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

(!) You can change the proportions and position of the neon tube by adapting them to your space! to do this, there is a geometry option with helpers in the scene (see the video instructions: https://disk  .yandex.ru/i/YKrllA1mRpxxjw)
In the scene there is also a version of the lamp, translated into editable poly (not editable)
The export file contains only the non-editable version!

Freelaight PDNT is a flexible neon lamp that can take any shape from Centrsvet. https://www.centersvet.ru/catalog/freelight_main/freelight_ring_pdnt/ 

The scene presents 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