The model was created in 2018 version and saved in the earlier 2015 one.
The OBJ format is also present.
There are no third-party plugins, all elements are named by their own names.
For Corona render, it is recommended to install version no lower than 1.5, since the glossiness of materials is configured taking into account PBR
(SCENE IN MILLIMETERS)
https://artelamp.ru/catalog/tochechnyie-svetilniki/tochechnyie-podvesnyie-svetilniki/a6110sp-2bk