Qhov nruab nrab illuminance (Eav)=Tag nrho cov luminous flux ntawm lub teeb qhov chaw (N * Ф) * Utilization factor(CU) * Maintenance factor(MF)/
cheeb tsam cheeb tsam (㎡) (tsim rau sab hauv tsev lossis chaw ncaws pob teeb pom kev zoo suav).
Kev siv coefficient: feem ntau sab hauv tsev siv {{0}}.4, kev ua kis las coj 0.3.
Maintenance coefficient: feem ntau siv {{0}}.7 txog 0.8.
Piv txwv:
(1) Sab hauv teeb pom kev zoo: 9 teeb ntawm 3 × 36W grille teeb yog siv rau chav 4 × 5 meter.
Nruab nrab illuminance{{0}}tag nrho cov luminous flux ntawm lub teeb qhov chaw × CU × MF / cheeb tsam=(2500 × 3 × 9) × 0.4 × 0.8÷4÷5
=1080
Lux
(2) Gymnasium teeb pom kev zoo: 20 × 40 meters, siv POURSPOT
60 teeb ntawm 1000W hlau halide teeb,
Nruab nrab illuminance{{0}}tag nrho cov luminous flux ntawm lub teeb qhov chaw × CU × MF / cheeb tsam=(105000 × 60) × 0.3 × 0.8÷20÷40
=1890
Lux
Cov ntaub ntawv txuas ntxiv:
Tus qauv tus nqi ntawm illuminance yog 0.5, 1, 3, 5, 10, 15, 20, 30, 50, 75, 100, 150,
200, 300, 500, 750, 1000, 1500, 2000, 3000
, 5000 lx
Qib. lx (lux) yog chav tsev ntawm illuminance.
Qhov kev faib tawm ntawm tus nqi hluav taws xob yog raws li cov txiaj ntsig ntawm qhov pom tseeb tias qhov kev hloov pauv me tshaj plaws hauv lub teeb pom kev zoo, thiab qhov sib txawv ntawm qhov illuminance yog li 1.5 npaug.
Nyob rau hauv tshav ntuj ncaj qha rau lub caij ntuj sov, lub teeb ci tuaj yeem ncav cuag 60,000 txog 100,000 lx, 10,000 txog 10,000 lx sab nraum zoov tsis muaj lub hnub, 100 mus rau 550 lx nyob rau hauv tsev nyob rau hauv lub caij ntuj sov kaj, thiab 0.2 lx nyob rau hauv lub hli tag nrho hmo ntuj.
Incandescent teeb tawm txog 12.56 ib watt
lx lub teeb, tab sis tus nqi sib txawv nrog qhov loj ntawm lub teeb, lub teeb me me tuaj yeem tawm ntau lumens, thiab lub teeb loj muaj tsawg dua. Lub luminous efficiency ntawm lub teeb fluorescent yog 3 mus rau 4 npaug ntawm lub teeb incandescent, thiab lifespan yog 9 npaug ntawm cov teeb incandescent, tab sis tus nqi siab dua.
