In the scene 2 models of the lamp (Kubing and Kubing 2) are white and black + nozzles of different colors.

In order to change the color of the nozzle on the luminaire, you can apply to the object the material of the nozzle of the desired color (after placing it in the editor of materials with the instrument "pipette") or simply replace the nozzle with the desired color.

The TurboSmooth modifier is applied to the reflector object. When rendering a large number of fixtures, I recommend disabling it.

Information about the lamp on the site: ledron.ru