Uyayiqonda yini “i-lumen” okumele isibani siyazi?

Ekuthengweni kwengaphandleikhandaizibanifuthiukukhempaIzibani zivame ukubona igama elithi “lumen”, uyaliqonda?

Ama-lumens = Ukuphuma Kokukhanya. Ngamagama alula, ama-lumens (achazwa ngokuthi i-lm) ayisilinganiso senani eliphelele lokukhanya okubonakalayo (esweni lomuntu) okuvela esibanini noma emthonjeni wokukhanya.

Abaningiokuvamile ngaphandleukukhempaukukhanya, isibani sekhanda noma ithoshiizibani ze-LED, ezisebenzisa amandla amancane ngakho-ke zinesilinganiso se-watt esiphansi. Lokhu kwenza ama-watt esasiwasebenzisa ukukala ukukhanya kwebhalbhu yokukhanya angasasebenzi, ngakho abakhiqizi bashintshela kuma-lumens.

I-Lumen, iyunithi ebonakalayo echaza ukugeleza kokukhanya, ikalwe ngo-“lm”, okufingqiwe ngokuthi “lumen”. Uma inani le-lumen liphakeme, kulapho ibhalbhu ikhanya khona. Uma ungaqiniseki ngezinombolo ze-lumen, leli shadi lezibani ze-incandescent kuya ku-LED lingakunikeza inkomba. Okusho ukuthi, uma ufuna i-LED engafinyelela umphumela wesibani se-incandescent esingu-100W, khetha i-LED engu-16-20W futhi uzothola ukukhanya okufanayo.

Ngaphandle, ngokwezinhlobo ezahlukene zemisebenzi ngokuvamile kudinga amazinga ahlukene e-lumen, ungabhekisela kule datha elandelayo: ukukhempa ebusuku: cishe ama-lumen ayi-100 ukuhamba ngezinyawo ebusuku, ukuwela (uma ucabanga ngezinguquko zesimo sezulu njengemvula nenkungu): ama-lumen angu-200~500 mayelana nokugijima emzileni noma eminye imijaho yasebusuku: ama-lumen angu-500~1000 ukusesha nokusindisa ebusuku kochwepheshe: ama-lumen angaphezu kuka-1000

Qaphela uma usebenzisaizibani zangaphandle(ikakhulukazi labo abane-lumens ephezulu), ungabaqondisi emehlweni abantu. Ukukhanya okukhulu kakhulu kungabangela umonakalo emehlweni abantu.