TY JOUR TI THE DEVELOPMENT AND RESEARCH OF THE DESIGN OF HOTHOUSE IRRADIATOR WITH ADJUSTABLE CHARACTERISTICS KW protected ground structures KW LED ir-radiators KW regulation of the light intensity curve KW point sources of radiation KW energy efficiency KW protected ground structures KW LED ir-radiators KW regulation of the light intensity curve KW point sources of radiation KW energy efficiency JO Bulletin of KSAU AU Dolgikh, P.P. AU Sanginov, M.K. AU Khusenov, G.N. PY 2017 IS PB Krasnoyarsk State Agrarian University