Lapho uthenga isibani, isilinganiso se-lumen yilokho okubona kuqala. Kodwa ingabe uyazi ukuthi akhona amanye amayunithi okulinganisa ukukhanya abaluleke ngokulinganayo njenge-candela ne-lux?
Uma uthenga ama-spotlights noma ukukhanya kwe-laser, cabanga nge-candela ngokukhanyisa okugxilile. Nokwezibani ezijwayelekile ezifana Imibala ye-LED, ama-tube lights, ama-bulb, njll., hlola isilinganiso se-lumen. Nokho, ngokusebenza kahle kokukhanyisa, inani le-lux likunikeza ulwazi olunembe kakhudlwana.
Ake sihlole i-candela, i-lux, ne-lumen futhi sifunde ukusebenzisa lawa mayunithi ukuze sikhethe isibani esingcono kakhulu sanoma yiluphi uhlelo lokusebenza:
Uyini uCandela?
I-Candela (cd) iyunithi yokuqina okukhanyayo. Leli gama lisuselwa egameni lesiLatini elithi 'Candela' futhi lihlobene nokuqina kwekhandlela. Ngokwesibonelo, ikhandlela elilodwa licishe lilingane nokukhanya kwekhandlela.
Kodwa-ke, ngokuthuthuka kobuchwepheshe, incazelo ye-candela ishintshile ezizukulwaneni ngezizukulwane. Ngo-1979, I-General Conference on Weights and Measures (CGPM) ichaze i-candela ngokuthi:
"I-candela amandla akhanyayo, ngendlela enikeziwe, yomthombo okhipha imisebe ye-monochromatic ye-frequency 540 x 1012 hertz futhi enomfutho okhazimulayo kuleyo ndlela engu-1/683 watt nge-steridian ngayinye."
Kodwa-ke, incazelo yakamuva, njengoba ishintshwe ngoMeyi 20, 2019, iyinkimbinkimbi kakhulu futhi iqondiswe kakhulu kochwepheshe bezobuchwepheshe. Lokhu kuhamba kanje:
“…… inani eligxilile lenombolo yokusebenza ngokukhanyayo kwemisebe ye-monochromatic ye-frequency 540×1012 Hz, Kcd, ukuze ibe ngu-683 uma ivezwa kuyunithi lm⋅W−1, elingana ne-cd⋅sr⋅W−1, noma cd⋅sr⋅kg−1⋅m−2⋅s3, lapho ikhilogremu, imitha kanye nesesibili =-0987654321`kuchazwa ngo-h, c kanye no-ΔνCs."
Ukwenza kube lula, i-candela ikala ukushuba kokukhanya endaweni ethile noma engeli. Ngokwesibonelo, cabanga nge-spotlight eqondisa ukukhanya ohlangothini oluthile kanye ne-bulb esakaza ukukhanya kuzo zonke izinhlangothi. Iyiphi ezoba nenani eliphakeme le-candela?
I-spotlight ine-engeli encane ye-beam futhi inikeza ukukhanya okugxilile. Ngakho-ke, ukukhanya kwayo kuleyo ndlela ethile kuyoba phezulu. Ngokuphambene, ukukhanya kwe-bulb kuzosatshalaliswa kuzo zonke izinhlangothi, okuholela enani eliphansi le-candela.
Yini uLux?
I-Lux (lx) iyunithi yokulinganisa ye illuminance or ukukhanya okukhanyayo indawo ngayinye. Ikala inani lokukhanya imitha yesikwele yendawo.
I-lux engu-1 ilingana nenani lokukhanya eliphelele lendawo eyimitha-skwele engu-1 ekhanyiswe umthombo wokukhanya welume eli-1 eliqhele ngemitha elingu-1. Ukwenza lula, i-1 lux ilingana ne-lumen eyi-1 imitha yesikwele.
Ukwenza lula, i-1 lux ilingana ne-lumen eyi-1 imitha yesikwele.
Ngakho-ke, ukuze uthole isilinganiso esihle, udinga ukucabangela indawo yegumbi noma ibanga lomthombo wokukhanya ukusuka endaweni ethile. Kulokhu, inani le-lux lilingana ngokuphambene nesikwele nebanga.
Isibonelo, ukukhanya okunama-lumens angu-500 ku-square meter surface. Ngakho ukulinganisa kwayo okunethezeka kuzoba (500 lm ፥ 1 m2) = 500 lx. Manje, faka ukukhanya okufanayo kwamalumens angu-500 aqondiswe endaweni engamamitha-skwele amahlanu. Inani lentengo lapha lizoba (500 lm ፥ 5 m2) = 100 lx, linciphe izikhathi ezi-5.
Okusho ukuthi, njengoba ibanga phakathi kobuso nomthombo wokukhanya likhula, inani le-lux liyancipha. Ngakho, ukukhanya okubonakala kukhanya ekamelweni elincane ngeke kubonakale kugqamile uma kufakwa ekamelweni elikhulu.
Iyini i-Lumen?
I-Lumen ikala inani le-flux ekhanyayo. Ibonisa ukukhanya okuphelele komthombo wokukhanya kuzo zonke izinhlangothi.
I-Lumen ichazwa njengenani lokukhanya okubonakalayo umthombo wokukhanya wekhandlela elingu-1 ophuma kuyunithi engu-1 ye-engeli eqinile (1/4π yendawo yendilinga). Ngokungafani ne-candela (cd), i-lumen ayibali ukukhanya kwesiqondiso esithile. Kunalokho, icabangela ukukhanya okuphelele komthombo kuzo zonke izinhlangothi.
Isibonelo, i-bulb enezilinganiso ze-candela ezi-3 inesilinganiso se-lumen esingu-38 lm (approx). Manje uma usitha uhhafu wesibani futhi uvumela ukukhanya kukhanye nge-hemisphere eyodwa, inani le-candela lisazohlala linjalo. Lokhu kungenxa yokuthi, ukusuka ebangeni elithile, amandla okukhanya kwesibani esisithekile asafana. Nokho, inani le-lumen lizokwehliswa libe uhhafu futhi libe ngu-19 lm njengoba uvimbe uhhafu womthombo wokukhanya.
Ubudlelwano phakathi kweCandela, iLux, neLumens
Ubudlelwano obuvame kakhulu phakathi kwala magama amathathu ukuthi wonke ayiyunithi yokulinganisa yokukhanya. Ukucacisa lo mqondo, ake sifinyelele kumsuka wala magama-
a. ULumen noCandela: Ubudlelwano
I-Lumens iwuhlobo olususelwe ku-candela. Womabili la magama alinganisa ukukhanya; okungukuthi, basho ukukhanya komthombo wokukhanya. Umehluko wukuthi ama-lumens abheka imishayo yokukhanya evela kuzo zonke izinkomba. Ngokuphambene, uCandela ubheka lokho ngendlela ethile. Indilinga egcwele ine-engeli eqinile engu-4π ama-steradians, ngakho-ke umthombo wokukhanya okhipha ikhandlela elilodwa ngokulinganayo kuzo zonke izinhlangothi unokukhanya okukhanyayo okuphelele koku:
| 1 cd × 4πsr = 4π cd · sr ≈12.57 lm Ikhandlela elingu-1 = 12.57 lumens |
Qaphela: Njengoba i-candela ne-lumen zingamayunithi amabili ahlukene, ungawashintshanisa.
b. I-Lumens ne-Lux: Ubudlelwano
I-Lux itholakala ku-lumen, ngakho-ke inani le-lumen linomthelela omkhulu ku-lux. Ngokwezibalo, 1 lx = 1lm/m². Lesi sibalo sinikeza ukumelwa okunembe kakhudlwana kokukhanya kunama-lumens.
c. U-Lux noCandela: Ubudlelwano
I-Lux inguqulo yemethrikhi yamakhandlela ezinyawo (igama elidala elibhekisela ku-candela). Ngakho-ke, i-candela, i-lux, ne-lumens ihlobene. Basho ubunikazi obuthathu obuhlukene, kodwa baxhumekile futhi bayaguquleka.
| Ithathwe kokuthi Ithathwe kokuthi Lux ———————→ Lumens ——————–→ Candela 1 lx = 1 lm/m2 = 1 cd·sr/m2 |
Candela vs Lux vs Lumens - Uyini Umehluko?
Candela vs Lux
U-Candela uchaza ukukhanya kokukhanya endaweni ethile. Ngokuphambene, i-lux ibonisa inani lokukhanya elifinyelela endaweni eqondile. Okusho ukuthi, i-lux ihlobene nendawo yesikhala esikhanyisiwe, kodwa i-candela ayibhekani nendawo engaphezulu.
Kodwa-ke, inani le-lux lincike endaweni kanye nebanga phakathi komthombo wokukhanya nendawo. Ngaphandle kwalokho, kubuye kuncike kunani le-candela. Kodwa ucandela uzimele kulezi zici.
| Imigomo | Candela (cd) | I-Lux (lx) |
| Izindlela | Ukuqina kokukhanya endaweni ethile | Inani lokukhanya endaweni ethile |
| Ibanga Lomthombo Wokukhanya | Akuthinti | Ithinta; ngokuphambene nebanga. |
| Indawo Yendawo Ekhanyayo | Akuthinti | Ithinta; ngokuphambene nebanga. |
I-Lux vs Lumens
I-Lumen ichaza inani lokukhanya elikhanyiswa umthombo wokukhanya. Ngokuphambene, i-lux ichaza inani lokukhanya eliwela endaweni ethile yendawo.
Nge-lumen, ungakwazi ukubona ukuthi umthombo wokukhanya ukhanya kangakanani. Isilinganiso esiphezulu se-lumen sisho ukuphuma kokukhanya okukhanyayo. Ngaleso sikhathi, isilinganiso esiphezulu sisho ukuthi umsebe wokukhanya owela endaweni ethile ukhanya ngokugqamile. Ngakho-ke, umehluko lapha ukuthi inani le-lux lincike ebangeni eliphakathi komthombo wokukhanya nendawo yokukhanyisa. Kodwa i-lumen izimele kude.
Nakuba i-lumen iyisilinganiso esisetshenziswa kakhulu sokulinganisa ukukhanya, i-lux iyivelu ebaluleke kakhulu yokukala ukusebenza kokukhanya. Kungakho kufanele ucabangele inani le-lux lokukhanyisa umsebenzi okhanyayo. Inani eliphakeme le-lux liqinisekisa ukukhanya okufanele endaweni yakho yokusebenza, okukuvumela ukuthi usebenze kalula.
| Imigomo | Lux | I-Lumen |
| Iyanquma | Inani lokukhanya elifinyelela phezulu | Inani eliphelele lokukhishwa kokukhanya komthombo wokukhanya |
| Ukumethemba | Inani lincike ebangeni nesilinganiso selumen | Inani lincike emandleni omthombo wokukhanya |
| Ibanga Lomthombo Wokukhanya | Izindaba; njengoba indawo engaphezulu ikhula, inani le-lux liyancipha | Akunandaba |
| Indawo engaphezulu | Izindaba; njengoba indawo ephezulu ikhula, inani le-lux liyehla | Akunandaba |
| Ukusetshenziswa Okuvamile | Ukukhanyisa umsebenzi, ukukhanya okugxilile, isibonelo: izibani zomgwaqo, amalambu, Njll | Ukukhanyisa okuvamile, njenge Izibani ze-strip ze-LED, ama-floodlights, njll. |
Lumens vs Candela
Umehluko omkhulu phakathi kwe-lumen ne-candela ukuthi i-lumen icabangela ukuphuma kokukhanyisa okuvela emthonjeni wokukhanya. Ngokuphambene, i-candela ikala ukushuba kokukhanya ohlangothini oluthile.
Ngokusebenzisa isilinganiso se-lumen, ungathola umbono wokukhanya komthombo wokukhanya. Kodwa i-candela ikwazisa ukuthi ukukhanya okugxilile kuzovela kanjani endaweni ethile. Ngakho-ke, isibani esinenani eliphakeme le-lumen singakhanyisa isikhala esikhulu. Ngakolunye uhlangothi, ukukhanya kwe-candela okuphezulu kusho ukuthi isibani siqondisa i-beam egxilile, okuholela ekukhanyeni okugxilile.
Ngakho-ke, uma ufuna ukukhanya okuvamile, cabangela izibani ezinesilinganiso esiphezulu se-lumen. Futhi uma uthanda ukuphimisela noma ukukhanya komsebenzi futhi udinga ukukhanya okugxilile, cabangela ama-bulb anesilinganiso esiphezulu se-candela.
| Imigomo | I-Lumens (lm) | Candela (cd) |
| Ukucatshangelwa kokuqondisa kokukhanya | Konke ukuqondiswa (360° sphere) | Ukuqondiswa okuqondile (nge-engeli ethile) |
| I-Beam Angle | Wide | Nqena |
| Ukumethemba | Inani lincike ekuphumeni kokukhanya okuphelele komthombo | Inani lincike ekugxilweni kwe-beam endaweni ethile. |
| Ukusetshenziswa Okuvamile | Ukukhanyisa okuvamile; isibonelo, i-tube light, i-bulb, i-floodlight, njll. | Ukukhanyisa okugxilile, okufana nezibani, izibani ze-laser, amalambu ethrekhi, njll. |
Ishadi Lilonke Elihlukanisayo: Candela vs Lux vs Lumens
| Imininingwane | Candela | Lux | Lumens |
| Uphawu (SI) | cd | lx | lm |
| Incazelo | I-Candela izinga lokukhanya lomthombo wokukhanya nge-engeli ethile nasendleleni. | Inani lokukhanya elishaya indawo ngayinye yemitha yesikwele yi-Lux. | I-Lumen ibonisa ukuphuma okuphelele kokukhanya kuzo zonke izinhlangothi. |
| Izindlela | Amandla Akhanyayo | Ukukhanya | I-Lluous Flux |
| Ukuncika ebangeni | Cha | Yebo | Cha |
| Ukuncika Endaweni Yobuso | Cha | Yebo | Cha |
Ungabala kanjani i-Candela, i-Lux, ne-Lumens?
Ibala u-Candela
Ikhandlela elingu-1 lilingana no-12.57 lumens. Kodwa-ke, uma ubona isilinganiso se-lumen se-bulb njengo-1000lm, akusho ukuthi amandla okukhanya (cd) webulb nawo angu-1000cd. Udinga ukucabangela i-engeli eqinile yokukhanya okukhanyisiwe ukuze uthole i-lumen. Ifomula ihamba kanje:
| Candela = ( Lumen/I-Engeli Eqinile) cd = (lm/sr) |
Okusho ukuthi, isibani esinokukhanya okungu-1000lm, esabalalisa ukukhanya kwayo nge-engeli eqinile engu-2π steradians, sinokushuba okukhanyayo (cd) kokungu-(1000lm/2π sr) = (1000/6.2832) ≈159.15 cd.
(Qaphela: Vale of π (pie) ≈ 3.14159)
Ibala uLux
I-Lux isilinganiso senani lokukhanya elikhishwa isibani esingu-1-lumen endaweni eyimitha yesikwele eyodwa. Ngakho, ifomula ihamba kanje:
| 1 Lux = 1 Lumen per square meter Noma, 1 lx = 1 lm/m² |
Okusho ukuthi, uma ufaka ukukhanya kwe-lumen engu-1000 ekamelweni elingamamitha-skwele angu-50, ukukhanya okungaphezulu kuzoba: (1000 lm/50m²) = 20lx.
Ibala iLumen
Ungakwazi ukubala i-lumen ngokucabangela kokubili i-candela ne-lux. Uma kucatshangelwa inani le-candela, ifomula ye-lumen ihamba kanje:
| Lumen = Candela x Solid Angle 1 lm = 1 cd·sr |
Isibonelo, uma une-bulb enobukhulu obukhanyayo obungu-100 cd kanye ne-engeli eqinile engu-2π sr, inani layo lelume ngu-100 cd×2π sr =100×6.2832 =628.32 lm.
Kodwa-ke, ukuze uthole inani le-lumen usebenzisa i-lux, udinga ukucabangela indawo yendawo ekhanyisiwe. Ifomula ihamba kanje:
| Lumen = Lux x Indawo lm = lx × m² |
Ake sithi, iphansi elinendawo engamamitha-skwele angu-5 lithola ukukhanya okungu-200 lx. Inani le-lumen ye-bulb lizoba: 200lx x 5m² = 1000lm.
Izinto Ezithinta Amanani E-Candela, I-Lux, ne-Lumens
1. Ibanga
Inani le-lux lincike ebangeni lendawo/into ekhanyisiwe kanye nomthombo wokukhanya. I-Lux ilingana ngokuphambene nesikwele sebanga. Isibonelo, uma ibanga likhuphuka ngokuphindwe kabili, inani le-lux lizokwehla libe ngu-1/4th wamanani okuqala.
I-Candela ne-lumen value ayishintshi nebanga. Isibonelo, isibani esingu-1000-lumen sizokhipha i-lumen engu-1000 noma ngabe uqhele ngemitha eyi-1 noma amamitha ayi-10 ukusuka kuso. Nokho, ukukhanya kuzobonakala kungakhanyi kangako njengoba uya kude nomthombo wokukhanya.
2. I-Angle Of Radiance
I-angle encane ikhiqiza ukukhanya okugxilile, okwandisa inani le-candela ne-lux. Futhi, nge-engeli ebanzi, indawo yesikhala esikhanyisiwe iyanda, futhi inciphisa amanani e-candela ne-lux. Kodwa-ke, inani le-lumen lihlala lingathinteki i-engeli yokukhanya.
3. Ukusebenza Okukhanyayo
Ngenxa yokwanda kokufaka kwamandla, inani le-lumen lokukhanya nalo liyakhuphuka. Nokho, ukuze uqinisekise ukusebenza kahle okukhanyayo, kufanele ucabangele amanzi omthombo wamandla. Ukukhanya okunikeza ukukhanya okukhanyayo okunamazinga aphansi wattage kunokusebenza kahle kokukhanya okuphezulu.
Ukusetshenziswa Okungokoqobo Kwezilinganiso Ze-Candela, Lux, kanye Ne-Lumen Ekukhetheni Ukulungiswa Okufanele
I-Candela, i-lux, ne-lumen ndawonye iyakuqondisa ekukhetheni ukukhanya okufanele kwanoma yiluphi uhlobo lwesicelo. Yile ndlela okufanele usebenzise ngayo la mayunithi ngenkathi ukukhanya okuklama:
| Ukukhanyisa Okujwayelekile | Ikhaya Lighting Design | • I-Candela ikuqondisa ukuthi uthole ukukhanya okugxilile kokukhanyisa umsebenzi • I-Lux isiza ukukhetha amaleveli okukhanya afanelekile amagumbi ahlukene • Isilinganiso se-Lumen sikunikeza umbono wokukhanya okuphelele kwesikhala sakho. |
| Outdoor Street Lighting | • I-Candela ikuvumela ukuthi ukhethe izibani zomgwaqo ezifanele, eziqinisekisa ukubonakala okufanele. • I-Lux ikusiza ukuthi unqume ukukhanya emigwaqweni. • Izilinganiso ze-Lumens zikuqondisa ukuthi ingabe ukukhanya kukhanya ngokwanele ukuze kukhanyise indawo enkulu evulekile. | |
| Ukukhanyisa Kwesiteji Seshashalazi | • Inani eliphakeme le-candela liqinisekisa ukuthi ukugqama esiteji setiyetha kukhiqiza imishayo egxilile kubadlali. • Uma ucabangela inani le-lux, ungakwazi ukufeza ukukhanya okuthandayo esiteji. • Izilinganiso ze-Lumen zikuvumela ukuthi usethe i-ambience iyonke yesiteji. Isibonelo, i-lumen ephansi izokwenza isiteji sifiphele, futhi nge-lumen ephezulu, isiteji sakho sizobukeka sigqamile. | |
| Izibani Zochwepheshe | Abaklami Bokukhanyisa Bezakhiwo | • I-Candela ikusiza ekugqamiseni izici ezikhethekile nge-engeli ye-beam egxilile • Isilinganiso se-Lux sikusiza ukuthi ulethe izinga eliphezulu lokukhanya ezindaweni ezahlukene • I-Lumens ikuvumela ukuthi ukhethe ileveli yokukhanya efanele ukuze ukhanyise izakhiwo zakho. |
| Abathwebuli bezithombe nabathwebuli bezithombe | • U-Candela uqondisa ukudalwa kwethunzi eliyingqayizivele kanye nokugqamisa kwezidingo zezithombe. • Ngokucabangela inani le-lux, ungathola ukuchayeka okufunayo ukuze uthole izithombe ezinemininingwane. • I-lumens iqinisekisa into oyichofozayo futhi ingemuva layo libonakala kahle. | |
| Izibani Zezimboni Nezasemsebenzini | • UCandela uqondisa ukukhanya okugxilile endaweni yokusebenza • I-Lux igcina ukukhanya okwanele endaweni yokusebenza • Ama-lumens ahlinzeka ngokukhanya okuvamile kokuphepha nokubonakala okufanele kwesisebenzi. | |
| Abahleli Bamadolobha kanye Nabaklami Bedolobha | • I-Candela, i-lux, ne-lumen iqondisa umklami ekufakeni into efanele emgwaqeni, emigwaqweni nasezindaweni zomphakathi. | |
| Abadayisi Bezitolo Nababonakalayo | • I-Candela ikusiza ekugqamiseni izinto ezihlukile • I-Lux iqinisekisa ukuthi indawo yakho yokubukisa umkhiqizo ikhanya kahle • I-Lumen iqinisekisa i-ambience enethezekile yekhasimende ukuthuthukisa umuzwa walo wokuthenga. |
Imibono Eyiphutha Evamile Mayelana ne-Candela, i-Lux, ne-Lumens
Ilinganisa ama-Watts ngokugqama
Umbono oyiphutha ovame kakhulu mayelana nokukhanya kokukhanya ukukukala ngama-wattage. Khumbula, ama-watts achaza ukusetshenziswa kwamandla kwesibani, hhayi ukukhanya kwayo. Isibonelo, isibani se-incandescent esingu-1000-lumen sinesilinganiso samanzi angu-65, kodwa isibani se-LED singanikeza ukukhanya okufanayo ngamawathi angu-10-15 kuphela.
Lokhu kusho ukuthi ukukhanya kwe-LED kungaletha ukukhanya okufanayo nesibani se-incandescent, kushise amandla amancane kakhulu. Lokhu kwenza ama-LED awonge kakhulu amandla.
Ukuziba i-engeli kanye nesiqondiso
Elinye iphutha elivamile ukungacabangi ukuhlola i-engeli nesiqondiso somthombo wokukhanya kuyilapho ucabangela inani le-candela. U-Candela ukala amandla okukhanya ohlangothini oluthile. Ngakho-ke, kufanele ucabangele i-angle yokukhanyisa kanye nesiqondiso sokuthola ukukhanya okugxilile okufunayo.
Ukugxila Kakhulu KumaLumen Wodwa
Ngenkathi uthenga noma isiphi isibani, isilinganiso se-lumen ukuphela kwe-matrix u-98% wabantu abajwayelekile abayifunayo. Kodwa kuwumkhuba ongalungile, futhi awukwazi ukuthola umphumela wokukhanyisa oyifunayo ucabangela kuphela inani le-lumen.
Isibonelo, uma uthenga izibani ukuze ugqamise umsebenzi wakho wobuciko, cabangela inani le-candela. Ngale ndlela, ukuze uthole ukukhanya okuhle okukhiphayo, cabangela wonke ama-matrices amathathu.
Izinselelo Zokukala Nokutolika i-Candela, i-Lux, ne-Lumens
- Ukuhluka komthombo wokukhanya nezici zemvelo kuthinta ukulinganiswa kwe-matrix yokukhanya. Ngakho-ke, inqubo yokulinganisa ejwayelekile ye-candela, i-lux, ne-lumen ngezinye izikhathi iholela ekungangeni kahle.
- Ochwepheshe bavame ukubhekana namaphutha ekuchazeni i-engeli kanye nesiqondiso sokukhanya. Lokhu kushintsha inani le-candela.
- Ngokuvuselelwa kobuchwepheshe bokukhanyisa, kunesidingo esikhulu sokuthuthukisa indlela yokusebenza nemishini yokulinganisa izakhiwo zokukhanya.
Iyiphi Iyunithi Yokulinganisa Ukukhanya Okujwayelekile Yemicu ye-LED?
As Izibani ze-strip ze-LED ikakhulukazi yakhelwe ukukhanyisa okuvamile, iyunithi yayo yokulinganisa ukukhanya okujwayelekile ngamalumens. Kodwa, sivame ukwenza amaphutha ukulinganisa ukukhanya kwemigqa ye-LED nge-wattage. Lokho kuwumkhuba ongalungile ngokuphelele njengoba izibani ezihlukene zinokukhanya okuhlukile.
Kodwa-ke, inani le-lumens liyahlukahluka ngombala womugqa we-LED. Ngokwesibonelo, imigqa emhlophe ye-LED inevelu yelume ephezulu kune imivimbo ye-LED enemibala.
Ngaphandle kwalokho, kuye ngohlelo lokusebenza, udinga ukucabangela amanye amayunithi afana ne-candela ne-lux futhi.
I-Lumens & Wattage Kuhlobana Kanjani?
Ama-lumens akhombisa inani eliphelele elikhishwa umthombo wokukhanya, kuyilapho i-wattage ingamandla asetshenziswa ukukhanyisa. Noma kunjalo, ukuze wahlulele ukusebenza kokukhanya, kufanele ucabangele ukusebenza kahle kokukhanya ngokwazi i-lumen nevelu ye-Wattage.
Kulokhu, ama-bulb onga amandla yiwona asebenza kahle kakhulu. Ngoba akhiqiza izinga eliphezulu le-lumen esebenzisa amandla amancane (wattage). Yingakho abizwa ngokuthi ama-bulb-saving bulbs.
Ukusebenza kahle kokukhanya kubalwa njenge-lumen nge-watt ngayinye. Leyo:
| Ukusebenza Okukhanyayo, E = lm/W |
Ngakho-ke, ukusebenza kokukhanya kuyanda lapho ukusebenza kahle kuba ngcono. Ngesikhathi esifanayo, izibani ezisebenza kahle kakhulu zinciphisa ibhili lakho likagesi.
Imibuzo Evame Ukubuzwa
Ukufaka phezulu
Yize i-candela, i-lux, ne-lumen isilinganiso sokukhanya, zontathu zingamayunithi ahlukene. Ngakho-ke, akufanele neze uzixube noma uzishintshe. Ukuze uthole isilungiselelo esingcono kakhulu sokukhanya, cabangela womathathu amayunithi eceleni ngenkathi uklama ukukhanya.
Kodwa-ke, ukuze uqinisekise ukunemba kwesilinganiso okukhulunywe ngakho emaphaketheni alula, thenga okokulungisa kumabhrendi athembekile. Futhi, hlola yabo ukunika isitifiketi ukuze uthole isiqiniseko esingcono.
