This is either a "ChainLight" system with front side from colour backlit acrylate, or the sides of letters and logo can be made also from aluminium or stainless steel. Illumination by system lightbulbs, or by neon tubes in the shape of letters and logo.

Credit Suisse  placed on the building of the company box sign	Credit Suisse placed on the building of the company box sign

Coca Cola box sign	OMV box sign