I-flux ekhanyayo
Ukukhanya okukhishwa umthombo wokukhanya ngesikhathi seyunithi kubizwa ngokuthi ukugeleza okukhanyayo komthombo wokukhanya φ Represent, igama leyunithi: lm (lumens).
amandla okukhanya
I-flux ekhanyayo ekhishwa umthombo wokukhanya kuyunithi ye-engeli eqinile yesiqondisindlela esinikeziwe ichazwa njengokushuba kokukhanya komthombo wokukhanya kuleyo ndawo, evezwa njenge-I.
I=I-flux ekhanyayo nge-engeli ethile Ф ÷ I-engeli ethize Ω (cd/㎡)
ukukhanya
Ukukhanya okukhanyayo endaweni yeyunithi ngayinye nge-engeli eqinile yesikhanyiso endaweni ethile.Imelwe ngu-L. L=I/S (cd/m2), i-candela/m2, eyaziwa nangokuthi i-grayscale.
ukukhanya
I-flux ekhanyayo etholwe ngeyunithi ngayinye yendawo, evezwa nge-E. Lux (Lx)
E=d Ф/ dS(Lm/m2)
E=I/R2 (R=ibanga ukusuka emthonjeni wokukhanya ukuya endizeni ekhanyisiwe)