[The influence of the optical irradiation of natural and artificial sources on humans]. / Vliianie opticheskogo izlucheniia estestvennykh i iskusstvennykh istochnikov na cheloveka.

The authors studied parameters of human natural insolation in relationships with season and functioning of main body systems. The functioning rhythms appeared to depend on natural saturation with optic energy. Regulation of light energy emitted by artificial sources requires consideration of natural background insolation in various seasons.