Lighting and Irradiating Installations for Cattle Barns.

The results of complex studies into the lighting environment of large cattle-breeding barns are presented. The studies were aimed at increasing cattle productivity. A description is made of experiments carried out in a cow- and a calf-shed, whose results indicate a possibility of compensation for the insufficiency of daylight in the winter period by providing artificial lighting and ultra violet irradiation. UV radiation doses for cows and calves in the case of fluorescent lighting are recommended.