TY JOUR TI A COMPREHENSIVE COMPARISON CRITERION OF NATURAL LIGHTING SYSTEMS FOR BUILDINGS KW natural lighting system KW energy balance of the building KW natural light factor JO Bulletin of Belgorod State Technological University named after. V. G. Shukhov AU Kononova, M.S. AU Zherlykina, M.N. AU Malysheva, A.N. PY 2019 IS 4 PB Belgorod State Technological University named after V.G. Shukhov