paigaldise kõigi valgustite koguvalgusvoo see osa, mis kiirgub rõhttasandist ülespoole, kui valgustid on paigutatud oma paigalduskõrgusele
proportion of the total luminaire flux that is emitted above the horizontal by all luminaires to the total luminaire flux from all luminaires in an installation, when the luminaires are mounted in their installed attitudes
