RATIONAL MEASUREMENT OF THE PROCESS OF THE LIGHT OF THE NEBESYS TRANSPARENT TOWER SYSTEM (ČESKÁ ŠABLONA 335 type with 40% perforation)

Ratio measurement of light transmittance of transparent roof system NEBESYS type ČESKÁ ŠABLONA 335 with perforation of 40% in slopes (60°, 45°, 30°) under evenly cloudy artificial sky with brightness gradation from horizon to zenith 1:3