Link to high-resolution renderers: https://yadi.sk/d/E1LLfcLF3NJNgs 

A set of commercial electricians and firefighters is made for corona render 1.5 and vray 3.2. Suitable for visualization of promotional objects hypermarkets gyms offices and other industrial and commercial premises. Easy attachment to auxiliary objects. Auxiliary objects are on a separate layer and are excluded from the rendering.

The set includes:
fixtures PHILIPS: UnicOne Pendant Fresh Food Pendant LumiStone Celino Savio;
air conditioning Daikin FUQ-C;
evacuation sign;
surveillance camera Hanwha XNP-6040H;
smoke detector;
loudspeaker RFC;
fire extinguishing system with sprinklers;
cable trays EzyStrut with cable for 600mm 450mm 300mm 150mm

All materials have unique and logical names are combined into a Multi / Sub object and assigned to objects.

All objects except cable trays are low polygonal! The stack contains Turbosmooth with the required amount of Render Iters for each object.

Adjust the anti-aliasing to your liking.

The vray materials are properly configured.
In the version of vray BRDF materials are installed in Microfacet GTR / GGX vray 2.4 owners need to install BRDF in Blinn. For Corona render it is recommended to put version no lower than 1.5 since the glossiness of materials is adjusted to the PBR.

Detailing models is suitable for close angles.

Beautiful to you renders!