Xa uthenga isibane sokukhanya, ukukala kwe-lumen yinto oyibonayo kuqala. Kodwa ngaba uyazi ukuba kukho ezinye iiyunithi zokulinganisa ukukhanya ezibaluleke ngokulinganayo njengecandela kunye nelux?
Ukuba uthenga izibane okanye ukukhanya kwelaser, qwalasela i-candela yokukhanyisa okugxininisiweyo. Kwaye kwizibane zokukhanyisa ngokubanzi ezifana Imichilo ye-LED, izibane ityhubhu, iibhalbhu, njl., khangela i-lumen rating. Nangona kunjalo, ekusebenzeni kokukhanyisa, ixabiso le-lux likunika ulwazi oluchanekileyo.
Masiphonononge i-candela, i-lux, kunye ne-lumen kwaye sifunde ukusebenzisa ezi yunithi ukukhetha esona sibane sikhanyisayo kuso nasiphi na isicelo:
Yintoni uCandela?
ICandela (cd) yinxalenye yokuqina okukhanyayo. Eli gama lisuka kwigama lesiLatini elithi 'Candela' kwaye linxulumene nobunzulu bekhandlela. Umzekelo, ikhandlela elinye liphantse lilingane nokuqaqamba kwekhandlela.
Nangona kunjalo, ngokuhambela phambili kwetekhnoloji, inkcazo yecandela itshintshile kwizizukulwana. Ngowe-1979, INkomfa Jikelele malunga neMilinganiselo kunye neMilinganiselo (CGPM) ichaze i-candela ngolu hlobo:
"I-candela bubushushu obukhanyayo, kwicala elinikiweyo, lomthombo okhupha imitha ye-monochromatic ye-540 x 1012 hertz kwaye inobunzulu obuqaqambileyo kwicala le-1/683 watt nge-steridian nganye."
Nangona kunjalo, inkcazo yamva nje, njengoko ilungisiwe nge-20 kaMeyi, 2019, inzima kakhulu kwaye ijolise ikakhulu kwiingcali zobugcisa. Oku kuhamba ngolu hlobo:
“…… ixabiso elimiselweyo lamanani okusebenza okukhanyayo kokusasazeka kwemitha ye-monochromatic ye-frequency 540×1012 Hz, Kcd, ukuba yi-683 xa ichazwa kwiyunithi lm⋅W−1, elingana ne-cd⋅sr⋅W−1, okanye cd⋅sr⋅kg−1⋅m−2⋅s3, apho ikhilogram, imitha kunye neyesibini zi=-0987654321`zichazwe ngokwemigaqo ye-h, c kunye nee-ΔνCs."
Ukwenza lula, i-candela ilinganisa ubunzulu bokukhanya kwicala okanye i-engile ethile. Ngokomzekelo, cinga ngespotlight esalathisa ukukhanya kwicala elithile kunye neglowubhu esasaza ukukhanya macala onke. Yeyiphi eya kuba nexabiso eliphezulu lecandela?
I-spotlight ine-engile emxinwa ye-beam kwaye inika ukukhanya okugxilwe. Ngaloo ndlela, ukukhanya kwayo kweso sikhokelo kuya kuba phezulu. Ngokwahlukileyo, ukukhanya kwebhalbhu kuya kusasazwa kuwo onke amacala, okukhokelela kwixabiso eliphantsi le-candela.
Yintoni uLux?
I-Lux (lx) yinxalenye yomlinganiselo we ukhanyiso or ukubhobhoza okukhanyayo kwindawo yeyunithi nganye. Ilinganisa ubungakanani bokukhanya kwimitha yesikwere yendawo.
I-1 lux ilingana nexabiso elipheleleyo lokukhanya kwendawo ye-square yemitha ekhanyiswe ngumthombo wokukhanya we-lumen e-1 ebekwe kwi-1 meter ngaphandle. Ukwenza lula, i-1 lux ilingana ne-lumen ye-1 kwimitha yesikwere.
Ukwenza lula, i-1 lux ilingana ne-lumen ye-1 kwimitha yesikwere.
Ngoko ke, kumlinganiselo wexabiso eliphezulu, kufuneka uqwalasele indawo yegumbi okanye umgama womthombo wokukhanya ukusuka kwindawo ethile. Kule meko, ixabiso le-lux lihambelana ngokuphambeneyo kwisikwere ukuya kumgama.
Umzekelo, ukukhanya kunye ne-500 lumens lits i-square meter surface. Ngoko ke ukulinganisa kwayo kuya kuba (500 lm ፥ 1 m2) = 500 lx. Ngoku, faka ukukhanya okufanayo kwee-lumens ezingama-500 ezijoliswe kwindawo ye-500-square-meter. Ixabiso le-lux apha liya kuba (5 lm ፥ 2 m100) = 5 lx, liyancipha ngamaxesha angama-XNUMX.
Oko kukuthi, njengoko umgama phakathi komphezulu kunye nomthombo wokukhanya ukhula, ixabiso le-lux liyancipha. Ngaloo ndlela, ukukhanya okubonakala kuqaqambile kwigumbi elincinane akuyi kukhangeleka kuqaqambile xa kufakwe kwigumbi elikhulu.
Yintoni iLumen?
I-Lumen ilinganisa ixabiso lokukhanya okukhanyayo. Ibonisa ukuqaqamba kukonke komthombo wokukhanya ukusuka macala onke.
I-Lumen ichazwa njengobungakanani bokukhanya okubonakalayo umthombo wokukhanya we-1 candela ukhupha kwiyunithi ye-1 ye-angle eqinileyo (1/4π yendawo ye-sphere). Ngokungafani ne-candela (cd), i-lumen ayibali ukukhanya kolwalathiso oluthile. Endaweni yoko, iqwalasela ukukhanya okupheleleyo komthombo ukusuka macala onke.
Umzekelo, ibhalbhu enamanqaku ama-3 ecandela inomlinganiselo welumen wama-38 lm (malunga). Ngoku ukuba usitha isiqingatha sebhalbhu kwaye uvumele ukukhanya kukhanyise kwi-hemisphere enye, ixabiso le-candela liya kuhlala lifana. Oku kungenxa yokuba, ukusuka kumgama othile, ukukhanya kokukhanya kwebhalbhu efihliweyo kusafana. Nangona kunjalo, ixabiso le-lumen liya kuncitshiswa libe sisiqingatha kwaye libe yi-19 lm njengoko uvale isiqingatha somthombo wokukhanya.
Ubudlelwane phakathi kweCandela, iLux, kunye neLumens
Olona nxulumano luqhelekileyo phakathi kwala magama mathathu kukuba onke asisilinganisi somlinganiselo wokukhanya. Ukucacisa ingqikelelo, masifikelele kwingcambu yala magama-
a. Lumens kunye noCandela: Ubudlelwane
I-Lumens luhlobo oluphuma kwi-candela. Omabini la magama alinganisa ukukhanya; oko kukuthi, bachaza ukuqaqamba komthombo wokukhanya. Umahluko kukuba i-lumens ithathela ingqalelo imiqadi yokukhanya ukusuka macala onke. Ngokuchaseneyo, uCandela uqwalasela oko kwicala elithile. Ingqukuva egcweleyo ineengile eqinileyo engu 4π i-steradians, ngoko ke umthombo wokukhanya oqaqamba ngokulinganayo ikhandlela enye macala onke unomsuko wokukhanya opheleleyo we:
| 1 cd × 4πsr = 4π cd · sr ≈12.57 lm I-1 candela = 12.57 lumens |
Qaphela: Kuba i-candela kunye nelumen ziziyunithi ezimbini ezahlukeneyo, ungazitshintsha.
b. I-Lumens kunye ne-Lux: Ubudlelwane
I-Lux ivela kwi-lumen, ngoko ke ixabiso le-lumen linempembelelo enkulu kwi-lux. Ngokwezibalo, 1 lx = 1lm/m². Le nxaki ibonelela ngomboniso ochanekileyo wokuqaqamba kokukhanya kunezibane.
c. ULux noCandela: Ubudlelwane
I-Lux yi-metric version yamakhandlela eenyawo (igama elidala elibhekiselele kwi-candela). Ke, i-candela, i-lux, kunye ne-lumens zinxibelelana enye kwenye. Bachaza izazisi ezintathu ezahlukeneyo, kodwa ziqhagamshelwe kwaye ziyaguqulwa.
| Ithathwe kwi-Derived from Lux ———————→ Lumens ——————–→ Candela 1 lx = 1 lm/m2 = 1 cd·sr/m2 |
Candela vs Lux vs Lumens - Yintoni Umahluko?
Candela vs Lux
UCandela uchaza ukuqaqamba kokukhanya kwindawo ethile. Ngokwahlukileyo, i-lux ibonisa isixa sokukhanya esifikelela kwindawo ecacileyo. Oko kukuthi, i-lux inxulumene nommandla wendawo ekhanyisiweyo, kodwa i-candela ayijongani nomhlaba.
Nangona kunjalo, ixabiso le-lux lixhomekeke kwindawo ephezulu kunye nomgama phakathi komthombo wokukhanya kunye nomphezulu. Ngaphandle koko, kuxhomekeke kwixabiso le-candela. Kodwa ucandela uzimele kwezi zinto.
| Criteria | Candela (cd) | Lux (lx) |
| Amanyathelo | Ukuqina kokukhanya kwicala elithile | Ubungakanani bokukhanya kwindawo ethile |
| Umgama womthombo wokukhanya | Ayichaphazeli | Ichaphazela; ngokuphambeneyo ngokuhambelana nomgama. |
| Indawo yoMphezulu oKhanyisiweyo | Ayichaphazeli | Ichaphazela; ngokuphambeneyo ngokuhambelana nomgama. |
Lux vs Lumens
I-Lumen ichaza ubungakanani bokukhanya okukhanyiswa ngumthombo wokukhanya. Ngokwahlukileyo, i-lux ichaza ubungakanani bokukhanya okuwela kwindawo ethile yomphezulu.
Nge-lumen, unokwazi ukubona ukuba ukukhanya okukhanyayo kunjani. Ukulinganisa okuphezulu kwe-lumen kuthetha ukuphuma kokukhanya okuqaqambileyo. Ngeli xesha, ukulinganisa okuphezulu kuthetha ukuba imitha yokukhanya ewela kwindawo ethile ikhanya ngokuqaqambileyo. Ngoko ke, umahluko apha kukuba ixabiso le-lux lixhomekeke kumgama phakathi komthombo wokukhanya kunye nokukhanya kokukhanya. Kodwa i-lumen ixhomekeke kumgama.
Nangona i-lumen iyeyona nto isetyenziswayo ukulinganisa ukukhanya, i-lux lixabiso elibaluleke kakhulu lokulinganisa ukusebenza kokukhanya. Kungenxa yoko le nto kufuneka uqwalasele ixabiso le-lux lokukhanyisa umsebenzi okhanyayo. Ixabiso eliphezulu le-lux liqinisekisa ukukhanya okufanelekileyo kwindawo yakho yokusebenza, ikuvumela ukuba usebenze ngokulula.
| Criteria | Lux | Lumen |
| Inquma | Ubungakanani bokukhanya obufikelela kumphezulu | Isiphumo sokukhanya esipheleleyo somthombo wokukhanya |
| Ukuxhomekeka | Ixabiso lixhomekeke kumgama kunye nokulinganisa kwe-lumen | Ixabiso lixhomekeke kwisakhono somthombo wokukhanya |
| Umgama womthombo wokukhanya | Imiba; njengoko indawo ephezulu inyuka, ixabiso le-lux liyancipha | Ayinamsebenzi |
| Indawo engaphezulu | Imiba; njengoko indawo ephezulu isanda, ixabiso le-lux liyancipha | Ayinamsebenzi |
| Usetyenziso oluQhelekileyo | Ukukhanya komsebenzi, ukukhanya okugxininisiweyo, umzekelo: izibane zesitrato, izibane, Njl | Ukukhanyisa ngokubanzi, njenge Izibane ze-LED strip, izibane zemvula, njl. |
Lumens vs Candela
Umahluko omkhulu phakathi kwe-lumen kunye ne-candela kukuba i-lumen iqwalasela ukuphuma kokukhanyisa ukusuka kumthombo wokukhanya. Ngokwahlukileyo koko, i-candela ilinganisa ubunzulu bokukhanya kwicala elithile.
Ngokusebenzisa ukulinganisa kwe-lumen, unokufumana ingcamango yokukhanya komthombo wokukhanya. Kodwa i-candela ikwazisa ukuba ukukhanya okugxininisiweyo kuya kubonakala njani kwindawo ethile. Ngoko, ukukhanya okukhanyayo kunye nexabiso eliphezulu le-lumen kunokukhanyisa indawo enkulu. Ngeli xesha, ukukhanya okuphezulu kwe-candela kuthetha ukuba isilungiso siqondisa umqadi ogxilileyo, okhokelela ekukhanyeni okugxininiswe ngakumbi.
Ngoko ke, ukuba ufuna ukukhanya okuqhelekileyo, qwalasela izibane ezinomlinganiselo ophezulu we-lumen. Kwaye ukuba ukwisigxininiso okanye isibane somsebenzi kwaye ufuna ukhanyiso olugxilileyo, qwalasela iibhalbhu eziphezulu zecandela.
| Criteria | Izibane (lm) | Candela (cd) |
| Ukuqwalaselwa kolwalathiso lokukhanya | Lonke icala (360° sphere) | Ulwalathiso oluthile (kwi-engile ethile) |
| I-Beam Angle | banzi | Nxubile |
| Ukuxhomekeka | Ixabiso lixhomekeke kwisiphumo sokukhanya esipheleleyo somthombo | Ixabiso lixhomekeke kugxininiso lomqadi kwicala elithile. |
| Usetyenziso oluQhelekileyo | Ukukhanyisa ngokubanzi; umzekelo, i-tube light, ibhalbhu, i-floodlight, njl. | Ukukhanyisa okugxininisiweyo, okufana nezibane, izibane zelaser, izibane zomzila, njl. |
Itshathi eyahlulayo iyonke: Candela vs Lux vs Lumens
| iinkcukacha | Candela | Lux | Lumens |
| Uphawu (SI) | cd | lx | lm |
| inkcazelo | I-Candela lizinga lokukhanya komthombo wokukhanya kwi-engile ethile kunye necala. | Isixa sokukhanya esibetha kwindawo nganye yemitha yesikwere yiLux. | I-Lumen ibonisa ukukhutshwa okupheleleyo kokukhanya kuwo onke amacala. |
| Amanyathelo | Ubunzulu bokukhanya | Ukukhanya | Isibane esikhanyayo |
| Ukuxhomekeka kumgama | Hayi | Ewe | Hayi |
| Ukuxhomekeka kuMmandla oMphezulu | Hayi | Ewe | Hayi |
Ibalwa njani iCandela, iLux, kunye neLumens?
Ukubala iCandela
Ikhandlela eli-1 lilingana no-12.57 lumens. Nangona kunjalo, ukuba ubona umlinganiselo we-lumen webhalbhu njenge-1000lm, oko akuthethi ukuba ubushushu obukhanyayo (cd) bebhalbhu bukwayi-1000cd. Kufuneka uqwalasele i-angle eqinileyo yokukhanya okukhanyayo ukuze ufumane i-lumen. Ifomula ihamba ngolu hlobo:
| Candela = ( Lumen/I-engile eqinileyo) cd = (lm/sr) |
Oko kukuthi, ibhalbhu enokukhanya kwe-1000lm, isasaza ukukhanya kwayo kwi-engile eqinileyo ye-2π steradians, inokuqina okukhanyayo (cd) ye (1000lm/2π sr) = (1000/6.2832) ≈159.15 cd.
(Qaphela: iVale ye-π (ipie) ≈ 3.14159)
Ukubala uLux
I-Lux ngumlinganiselo wokukhanya okukhutshwa yibhalbhu ye-lumen e-1 kwindawo enye yesikwere semitha. Ke, ifomula ihamba ngolu hlobo lulandelayo:
| 1 Lux = 1 Lumen nge square metre nganye Okanye, 1 lx = 1 lm/m² |
Oko kukuthi, ukuba ufaka ukukhanya kwe-lumen ye-1000 kwigumbi lemitha ye-square ye-50, ukukhanya kumphezulu kuya kuba: (1000 lm/50m²) = 20lx.
Ukubala iLumen
Unokubala i-lumen ngokuqwalasela zombini i-candela kunye ne-lux. Ukuqwalasela ixabiso le-candela, ifomula ye-lumen ihamba ngolu hlobo lulandelayo:
| Lumen = Candela x Solid engile 1 lm = 1 cd · sr |
Umzekelo, ukuba unebhalbhu enokuqina okukhanyayo kwe-100 cd kunye ne-engile eqinileyo ye-2π sr, ixabiso layo le-lumen yi-100 cd×2π sr =100×6.2832 =628.32 lm.
Nangona kunjalo, ukufumana ixabiso le-lumen usebenzisa i-lux, kufuneka uqwalasele indawo yokukhanya okukhanyayo. Ifomula ihamba ngolu hlobo:
| Lumen = Lux x Area lm = lx × m² |
Masithi, umgangatho kunye nommandla we-5 square metre ufumana ukukhanya kwe-200 lx. Ixabiso le-lumen yebhalbhu iya kuba: 200lx x 5m² = 1000lm.
Izinto ezichaphazela iiNqobo zeCandela, iLux, kunye neLumens
1. Umgama
Ixabiso le-lux lixhomekeke kumgama wendawo ekhanyisiweyo / into kunye nomthombo wokukhanya. I-Lux ihambelana ngokuphambeneyo kwisikwere somgama. Umzekelo, ukuba umgama unyuka ngokuphindwe kabini, ixabiso le-lux liya kuncipha ukuya kwi-1/4 yamaxabiso okuqala.
I-Candela kunye nexabiso le-lumen alitshintshi kunye nomgama. Umzekelo, ibhalbhu ye-1000-lumen iya kukhupha i-1000-lumen nokuba ume i-1m kude okanye i-10 m kude nayo. Nangona kunjalo, ukukhanya kuya kubonakala kukhanya kancinci njengoko usiya kude nomthombo wokukhanya.
2. I-engile yeRadiance
I-angle encinci ivelisa ukukhanya okugxininiswe ngakumbi, ukwandisa ixabiso le-candela kunye ne-lux. Kwakhona, kwi-angle ebanzi, indawo yendawo ekhanyisiweyo iyanda, kwaye iyancipha i-candela kunye nexabiso le-lux. Nangona kunjalo, ixabiso le-lumen lihlala lingachaphazeleki yi-angle yokukhanya.
3. Ubuchule obuqaqambileyo
Ngenxa yokunyuka kwegalelo lamandla, ixabiso le-lumen lokukhanya liyanda. Nangona kunjalo, ukuze uqinisekise ukusebenza kakuhle okukhanyayo, kufuneka uqwalasele amanzi omthombo wamandla. Ukukhanya okubonelela ngokukhanya okuqaqambileyo kunye namazinga aphantsi ombane aphantsi ukusebenza kakuhle kokukhanya.
Ukusetyenziswa okuSebenzayo kweCandela, iLux, kunye neLumen yokulinganisa ekukhetheni uLungiso oluLungileyo
I-Candela, i-lux, kunye ne-lumen kunye ziyakukhokela ekukhetheni ukukhanya okufanelekileyo kulo naluphi na uhlobo lwesicelo. Le yindlela ofanele ukuzisebenzisa ngayo ezi yunithi ngelixa uyilo lokukhanya:
| UkuKhanya ngokubanzi | Uyilo lokuKhanya kweKhaya | • UCandela ukhokela ukuba ufumane ukukhanya okugxininiswe ngakumbi kokukhanyisa umsebenzi • I-Lux inceda ukukhetha amanqanaba okukhanya afanelekileyo kumagumbi ahlukeneyo • Ukulinganisa kweLumen kukunika ingcamango yokuqaqamba ngokubanzi kwendawo yakho. |
| UkuKhanya kweSitrato sangaphandle | • I-Candela ikuvumela ukuba ukhethe izibane zesitrato ezifanelekileyo, ukuqinisekisa ukubonakala okufanelekileyo. • I-Lux ikunceda ukuba ubone ukukhanya ezindleleni. • Ukukala kweLumens kukukhokelela ekubeni ukukhanya kuqaqambe ngokwaneleyo ukukhanyisa indawo enkulu evulekileyo. | |
| ITheatrical Stage Lighting | • Ixabiso eliphezulu le-candela liqinisekisa ukukhanya kwiqonga lemidlalo yeqonga livelisa imiqadi egxininisiweyo kubadlali. • Ukuqwalasela ixabiso le-lux, unokufezekisa ukukhanya okukhethiweyo kwinqanaba. • Imilinganiselo yeLumen ikuvumela ukuba usete i-ambience iyonke yeqonga. Ngokomzekelo, i-lumen ephantsi iya kwenza isiteji sibe mnyama, kwaye kwi-lumen ephezulu, isigaba sakho siya kubonakala sikhanya. | |
| Izibane zobuNgcali | Abayili bezoKhanya bezoYilo | • I-Candela ikunceda ekuqaqambiseni izinto ezikhethekileyo nge-angle ye-beam egxilileyo • Ireyithingi ye-Lux ikunceda ukuzisa inqanaba lokukhanya kwizowuni ezahlukeneyo • I-Lumens ikuvumela ukuba ukhethe inqanaba lokuqaqamba elifanelekileyo ukukhanyisa izakhiwo zakho. |
| Abafoti kunye neeCinematographers | • UCandela ukhokela ekudalweni kwezithunzi ezikhethekileyo kunye neempawu eziphambili kwiimfuno zokufota. • Ngokuqwalasela ixabiso le-lux, unokufumana ukuvezwa okufunekayo kwiifoto ezineenkcukacha. • I-Lumens iqinisekisa into oyicofayo kwaye imvelaphi yayo ibonakala ngokufanelekileyo. | |
| UkuKhanya kwimizi-mveliso kunye neNdawo yoMsebenzi | • UCandela ukhokelela ekukhanyeni okuqaqambileyo kwindawo yokusebenza • I-Lux igcina ukukhanya okwaneleyo kwindawo yokusebenza • IiLumens zibonelela ngokukhanya ngokubanzi kukhuseleko kunye nokubonakala okufanelekileyo komqeshwa. | |
| Abacwangcisi beDolophu kunye nabayili beSixeko | • I-Candela, i-lux, kunye ne-lumen ikhokela umyili ekufakeni indawo efanelekileyo esitratweni, ezindleleni, nakwiindawo zoluntu. | |
| Abarhwebi abaThengisayo nabaBonakalayo | • UCandela uyakunceda ekuqaqambiseni izinto ezizodwa • I-Lux iqinisekisa ukuba indawo yokubonisa imveliso yakho ikhanya kakuhle • I-Lumen iqinisekisa i-ambience ekhululekileyo kumthengi ukuphucula amava abo okuthenga. |
Iingcamango ezingezizo eziQhelekileyo malunga neCandela, iLux, kunye neLumens
Ukulinganisa iiWatts ngokuKhanya
Eyona ngcamango iphosakeleyo ixhaphakileyo malunga nokuqaqamba kukulinganisa ngombane. Khumbula, iiwatts zichaza ukusetyenziswa kwamandla ebhalbhu, hayi ukuqaqamba kwayo. Umzekelo, ibhalbhu ye-1000-lumen ye-incandescent inomlinganiselo we-65-wattage, kodwa ukukhanya kwe-LED kunokunika ukukhanya okufanayo kunye ne-10-15 watts kuphela.
Oku kuthetha ukuba ukukhanya kwe-LED kunokuzisa ukukhanya okufanayo njengebhalbhu ye-incandescent, ukutshisa amandla amancinci kakhulu. Oku kwenza ii-LEDs zisebenzise amandla ngakumbi.
Ukungahoyi i-engile kunye ne-Directionality
Enye impazamo eqhelekileyo ayijongi ukuvavanya i-engile kunye nesalathiso somthombo wokukhanya ngelixa uqwalasela ixabiso le-candela. UCandela ulinganisa ubunzulu bokukhanya kwicala elithile. Ngoko ke, kufuneka uqwalasele i i-angle yokukhanyisa kunye nesalathiso sokufumana ukukhanya okufunayo.
Ukujolisa kakhulu kwiLumens yodwa
Ngelixa kuthengwa nasiphi na isibane sokukhanya, ukukala kwe-lumen kuphela kwe-matrix efunwa yi-98% yabantu ngokubanzi. Kodwa sisenzo esingalunganga, kwaye awukwazi ukufumana umphumo wokukhanyisa ofunekayo uqwalasela kuphela ixabiso le-lumen.
Umzekelo, ukuba uthenga izibane zokuqaqambisa umsebenzi wakho wobugcisa, qwalasela ixabiso lecandela. Ngale ndlela, ukufumana esona siphumo siphezulu sokukhanya, zithathele ingqalelo zontathu iimatriki.
Imingeni kuMlinganiso kunye nokutolika iCandela, iLux, kunye neLumens
- Ukwahluka kumthombo wokukhanya kunye nezinto ezisingqongileyo kuchaphazela umlinganiselo we-matrix yokukhanya. Ke, inkqubo yokulinganisa esemgangathweni ye-candela, i-lux, kunye ne-lumen ngamanye amaxesha ikhokelela ekungachanekeni.
- Iingcali zihlala zijongana neempazamo ekutolikeni i-engile kunye nesalathiso sokukhanya. Oku kutshintsha ixabiso le-candela.
- Ngohlaziyo lwetekhnoloji yokukhanyisa, kukho imfuneko enkulu yokuphucula indlela kunye noomatshini bokulinganisa iimpawu zokukhanya.
Yeyiphi iYunithi yoMlinganiso wokuKhanya oMgangatho wemitya ye-LED?
As Izibane ze-LED strip ubukhulu becala ziyilelwe ukukhanyisa ngokubanzi, iyunithi yokulinganisa ukukhanya okusemgangathweni ziilumens. Kodwa, sihlala sisenza iimpazamo xa silinganisa ukuqaqamba kwemivimbo ye-LED ngamanzi. Leyo yinto engafanelekanga ngokupheleleyo njengoko izibane ezahlukeneyo zineempumelelo ezahlukeneyo zokukhanya.
Nangona kunjalo, ixabiso le-lumens liyahluka kunye nombala womgca we-LED. Njengokuba, imigca emhlophe ye-LED zinexabiso eliphezulu lelume kune imigca ye-LED enemibala.
Ngaphandle koko, kuxhomekeke kwisicelo, kufuneka uqwalasele ezinye iiyunithi ezifana ne-candela kunye ne-lux kakhulu.
Zinxulumana njani iiLumens & Wattage?
IiLumens zibonisa isiphumo esipheleleyo esivela kumthombo wokukhanya, ngelixa amanzi ingamandla asetyenziselwa ukukhanyisa. Sekunjalo, ukugweba ukusebenza kokukhanya, kufuneka uqwalasele ukusebenza kakuhle kokukhanya ngokwazi i-lumen kunye nexabiso leWattage.
Kule meko, ii-bulbs zokulondoloza amandla zizona zisebenza kakuhle. Ngenxa yokuba bavelisa isantya se-lumen esiphezulu sisebenzisa amandla amancinci (amanzi). Yiyo loo nto zibizwa ngokuba ziibhalbhu ezonga amandla.
Ukusebenza kokukhanya kubalwa njenge-lumen nge-watt nganye. Yiyo i:
| Ukusebenza kokukhanya, E = lm/W |
Ke, ukusebenza kokukhanya kuyanda xa ukusebenza kuphucuka. Kwangaxeshanye, izibane ezisebenza kakuhle kakhulu zinciphisa ityala lakho lombane.
FAQs
Ukuqhawula phezulu
Nangona i-candela, i-lux, kunye ne-lumen yokulinganisa ukukhanya, zontathu ziyunithi ezahlukeneyo. Ke, akufuneki uzixube okanye uzitshintshe. Kwesona sicwangciso sokukhanya, qwalasela zonke iiyunithi ezintathu ecaleni ngelixa uyila ukukhanya.
Nangona kunjalo, ukuqinisekisa ukuchaneka kokulinganisa okukhankanywe kwipakethe yokukhanya, thenga izixhobo kwiimpawu ezithembekileyo. Kwakhona, khangela zabo iziqinisekiso ukuze ufumane isiqinisekiso esingcono.
