Permanent Lighting in industrial environment with strong vibration

I probably have the wrong picture, but could the walkway handrails support a few arches perhaps? lights on short chains are then a common solution to a vibration problem, but screw terminals can still be an issue. Mind you I'm intrigued as to what sort of bracket fails, if the walkway does not.  Though I can imagine long cantilever supports suffering rather like a wobbly diving board.
It may be worth looking at the sort of lights used on armoured vehicles and farm tractors and similar
Mike

Are you able to share any images, to help paint the picture? 

Can light fittings be clamped to the handrail? If only the walkway floor is to be illuminated, you don't necessarily need to have a fitting mounted above. It could be mounted horizontally.

Brackets failing are the ones coming with the light fittings. Any cantilever and unistrut attached to the walkway/handrails are generally resistant (although vibration increases the longer they become in particular if lighting is installed on ca. 2 meters high unistrut structure). 

Most typical accident would be the light fitting to fall on the walkway while the supporting unistrut stands there and wobbling.

I have seen some areas where additional ties were put around the light fitting as additional support and I'd like to avoid this in the future because it's not really state of the art.

clamping to the handrail proved to be not reliable due to vibration, how would you suggest to install them horizontally? Walkways are grated ones.Unfortunately I can't share pictures

Not the best image but i think it gives the idea. I understand that this is a temporary solution in this photo, but if were possible to fix tray to the rails and fix the light fittings either to the rails or tray.