Luminous flux
Umucyo utangwa nisoko yumucyo mugihe cyumwanya witwa luminous flux yinkomoko yumucyo resent Uhagarariye, izina ryumutwe: lm (lumens).
ubukana bw'urumuri
Luminous flux itangwa nisoko yumucyo mubice bikomeye impande yicyerekezo runaka isobanurwa nkuburemere bwurumuri rwumucyo uturuka muricyo cyerekezo, bigaragazwa nka I.
I = Luminous flux kumurongo wihariye Ф angle Inguni yihariye Ω (cd / ㎡)
umucyo
Luminous flux kuri buri gice cya buri gice inguni ikomeye ya kumurika muburyo bwihariye.Uhagarariwe na L. L = I / S (cd / m2), candela / m2, izwi kandi nka graycale.
kumurika
Luminous flux yakiriwe kuri buri gace, igaragarira muri E. Lux (Lx)
E = d Ф / dS (Lm / m2)
E = I / R2 (R = intera kuva isoko yumucyo kugeza indege imurikirwa)