Fakalaka atu ʻi he Ngingila ki he Tuʻunga Tatau

ʻI he taimi ʻoku tau fakakaukau ai ki he maama lelei, ko e ʻuluaki meʻa ʻoku tau faʻa haʻu ki heʻetau fakakaukau ko e ngingila. ʻOku ʻi ai nai ha maama feʻunga ke sio lelei? Neongo ia, ʻoku ʻiloʻi ʻe he kau mataotao ʻo e mama mo e ngaahi kautaha tuʻunga moʻui ʻoku ʻikai feʻunga ʻa e ngingila ʻataʻata pe. ʻE lava ke maʻolunga ʻa e maama ʻo ha loki pe malaʻe sipoti ka ʻoku kei hoko pe ia ko ha feituʻu fakalilifu ke vakaiʻi ai pe ʻoku ʻikai tufaki tatau ʻa e maama ko ia. Fakakaukauloto ki ha feituʻu ngaue ʻoku ʻi ai ha maama ngingila ʻi ʻolunga ka ʻoku ʻi ai ha ngaahi ʻata loloto ʻi he ngaahi tuliki. Pe ko ha malaʻe pasiketipolo ʻoku maama fakaʻofoʻofa ʻi lalo ʻi he hoops ka ʻoku poipoila ʻi he tafaʻaki. ʻOku fakafuofuaʻi ʻa e fehalaaki ko ʻeni, ʻa e taʻepotutatau ko ʻeni, ʻe ha fakangatangata mahuʻinga ʻoku ʻiloa ko e faitatau ʻo e mama. ʻOku mahuʻinga ʻa e meʻafua ko ʻeni, ʻa ia ʻoku ʻikai faʻa fakatokangaʻi ʻe he tokotaha angamaheni, ki he fiemalie ʻo e sio, malu mo e ngaue. ʻOku ne talamai pe ʻoku ongoʻi fakalata pe fakamalohi ha feituʻu, pe ʻe lava ke fakahoko ha ngaue taʻe faingataʻaʻia ʻa e mata, pea pe ʻe lava ke fakamafola ha sipoti taʻe ʻi ai ha ngaahi ʻata ʻoku ne tohoakiʻi ʻa e tokanga. ʻE vakaiʻi fakaʻauliliki ʻe he fakahinohino ko ʻeni ʻa e foʻi fakakaukau ʻo e faitatau ʻo e mama, fakamatalaʻi hono fakaʻuhingaʻi, fikaʻi fakafika, hono mahuʻinga ʻi he ngaahi polokalama kehekehe, pea mo e ngaahi tuʻunga moʻui fakavahaʻapuleʻanga ʻoku ne tuʻutuʻuni hono ngaahi tuʻunga ʻulungaanga mahuʻinga.

Ko e ha hono fakaʻuhingaʻi ʻo e faitaha ʻo e mama?

Ko e faitatau ʻo e maama ko ha meʻafua ia ʻo e tufaki tatau ʻo e mama ʻi ha fukahi feituʻu pe feituʻu. ʻOku ne ʻomi ha mataʻifika pe ʻe taha ʻoku ne talamai ʻa e fekauʻaki ʻa e ngaahi feituʻu ngingila mo fakapoʻuli taha ʻi ha feituʻu. ʻI hono fotunga angamaheni mo faingofua taha, ʻoku fakaʻuhingaʻi ia ko e ratio ʻo e maama siʻisiʻi taha (Emin) ki he ʻavalisi ʻo e maama (Eavg) ʻi he funga ko ia. ʻOku fua ʻa e maama ʻi he lux, ʻa ia ko e lahi ʻo e maama ʻoku to ʻi ha fukahi ʻelia ʻi he ʻiuniti. Ko ia, ke fikaʻi ʻa e tefitoʻi uniformity ratio ko ʻeni, te ke toʻo ʻa e tuʻunga maʻulalo taha ʻo e maama ʻoku fua ʻi ha feituʻu pe ʻi he grid ʻo e feituʻu ʻoku ke fakataumuʻa ki ai pea vahevahe ia ʻaki ʻa e ʻavalisi ʻo e ngaahi fua kotoa pe naʻe fai ʻi he feituʻu tatau pe. Ko e ola ko ha tuʻunga ʻulungaanga mahuʻinga ʻi he vahaʻa ʻo e 0 mo e 1. ʻOku fakahaaʻi ʻe he tuʻunga ʻulungaanga mahuʻinga ʻo e uniformity ofi ange ki he 1, hange ko e 0.8 pe 0.9, ʻa e tufaki tatau ʻo e mama, ʻa ia ko e feituʻu fakapoʻuli taha ʻoku meimei ngingila tatau pe mo e ʻavalisi. ʻOku fakahaaʻi ʻe ha tuʻunga ʻulungaanga mahuʻinga ofi ange ki he noa, hange ko e 0.2 pe 0.3, ʻa e faitatau ʻoku ʻikai lelei, mo e ngaahi kehekehe lahi mo e ngaahi feituʻu fakapoʻuli ʻaupito ʻi hono fakafehoanaki ki he ʻavalisi. ʻE maʻu ʻe ha maʻuʻanga maama tatau ʻaupito ʻa e 1, ʻa ia ko hono ʻuhinga ʻoku maʻu ʻe he poini kotoa pe ʻi he fukahi ʻa e maama tatau. Ko hono moʻoni, ʻoku taʻemalava ke aʻusia ha 1 haohaoa, pea ʻoku fie maʻu ʻe he ngaahi polokalama kehekehe ʻa e ngaahi tuʻunga kehekehe ʻo e faitatau ke lau ʻoku tali pe lelei ʻaupito.

Ko e ha ʻa e faitaha ʻo e U0 pea ʻoku anga fefe hono fikaʻi?

Ko e fakahaaʻi angamaheni mo fakaʻofisiale taha ʻo e faitatau ʻo e maama ʻoku fakaʻilongaʻi ko e U0. Ko e fika pau ʻeni ʻoku fakamatalaʻi ʻi he ngaahi tuʻunga fakavahaʻapuleʻanga ʻo e maama hange ko e EN 12464-1 (Maama mo e maama – Maama ʻo e ngaahi feituʻu ngaue) mo e ngaahi fakahinohino kehekehe ki he maama sipoti. ʻOku fakaʻuhingaʻi pau ʻa e U0 ko e quotient ʻo e maama siʻisiʻi taha (Emin) mo e ʻavalisi ʻo e maama (Eavg) ʻi he feituʻu ngaue ʻoku fakamahinoʻi:U0 = Emin / Eavg. Hange ko ʻeni, kapau ʻoku ʻavalisi ʻa e maama ʻo ha malaʻe ʻakapulu ko e 1000 lux, ka ko e feituʻu fakapoʻuli taha ʻi he malaʻe ko e 500 lux pe, ko e faitatau U0 ko e 500 / 1000 = 0.5. ʻE fakamahinoʻi leva ʻe he tuʻunga moʻui ʻa e U0 siʻisiʻi taha ʻoku fie maʻu ki he tohi kole ko ia, hange ko ʻeni, U0 ≥ 0.7 ki he fakamafola TV fakapalofesinale. ʻOku ʻuhinga ʻeni ke talangofua ʻa e malaʻe ko ia, ʻoku ʻikai lava ke siʻi hifo ʻi he 70% ʻo e ʻavalisi ʻo e mama. ʻOku fie maʻu ʻe hono fakapapauʻi ʻo e U0 ha grid matolu feʻunga ʻo e ngaahi tuʻunga ʻulungaanga mahuʻinga ʻo e maama kuo fikaʻi pe fua ʻi he feituʻu kotoa. Kuo pau ke lelei feʻunga ʻa e grid ko ʻeni ke maʻu ʻa e maama siʻisiʻi taha; Kapau ʻoku fuʻu fefeka ʻa e grid, mahalo ʻe ʻikai ke ke maʻu ʻa e feituʻu fakapoʻuli taha pea fuʻu totuʻa ʻa e faitatau. ʻOku fikaʻi ʻe he polokalama fakakomipiuta makehe ʻa e maama ʻa e ngaahi tuʻunga mahuʻinga ko ʻeni ʻo makatuʻunga ʻi ha grid simulated, lolotonga ia ʻoku fakaʻaongaʻi ʻe he kau ʻinisipekita ʻo e mama ʻa e ngaahi meʻafua ʻo e maama ke fua ʻaki ʻa e ngaahi meʻafua fakatuʻasino ʻi he ngaahi feituʻu grid kuo ʻosi fakapapauʻi ke fakapapauʻi ʻoku talangofua ki ai ʻi he feituʻu.

Ko e ha ʻoku fuʻu mahuʻinga ai ʻa e faitaha ʻo e mama?

Ko e mahuʻinga ʻo e faitaha ʻoku tupu fakahangatonu ia mei he founga ʻoku vakai mo ngaue ai ʻa e tangata ki he mama. ʻOku liliu maʻu pe hotau mata ki he ngaahi tuʻunga ʻo e maama ʻi he tafaʻaki ʻoku tau mamata ki ai. ʻI he taimi ʻoku tau ʻi ha ʻatakai ʻoku ʻikai ke faitatau—ʻa e ngaahi ʻata loloto ʻi he tafaʻaki ʻo e ngaahi feituʻu ngingila—kuo pau ke liliu maʻu pe ʻetau fanau ako ʻi heʻetau sio mei he feituʻu ʻe taha ki he feituʻu ʻe taha. ʻOku iku ʻa e liliu maʻu pe ko ʻeni ki he ongosia ʻo e sio, ongosia ʻa e mata, mo e langa ʻulu ʻi ha vahaʻa taimi. ʻI ha ngaueʻanga, ʻe lava ke fakasiʻisiʻi ʻe he meʻa ni ʻa e tokanga mo e ngaue. ʻI ha tuʻunga sipoti, ʻe lava ke ne uesia ʻa e ngaue ʻa ha tokotaha sipoti. Hange ko ʻeni, ko ha tokotaha vaʻinga soka ʻoku ne muimuiʻi ha foʻi pulu ʻi heʻene ngaʻunu mei ha feituʻu maama lahi ki ha konga ʻataʻata ʻe lava ke mole ia ʻi ha kiʻi sekoni mahuʻinga, ʻo uesia ai ʻenau malava ke fai ha vaʻinga. ʻOku ʻikai ko ha meʻa taʻefiemalie pe ʻeni; ko ha fakatuʻutamaki ia ki he malu. ʻIkai ngata ai, ʻe lava ke fakatupu ʻe he ʻikai faitatau ha ngaahi ʻatakai puputuʻu. Ko e ngaahi fakaikiiki mahuʻinga ʻ i he ngaahi feituʻu fakapoʻulí ʻ e lava ke fakapuliki fakaʻaufuli, ʻ o fakatuʻutāmaki ai ʻ i he ngaahi feituʻu ngāueʻangá pe ʻ i he ngaahi halá. ʻI he ngaahi feituʻu naʻe fokotuʻutuʻu ki he fakaʻofoʻofa, hange ko e fakatau fakamovetevete pe langa, ʻe lava ke maumauʻi ʻe he maama ʻa e ola ʻo e sio ʻoku fakataumuʻa, ʻo ʻai ha feituʻu ke ongoʻi ʻoku ʻikai fakaafe mo ʻikai lelei hono fokotuʻutuʻu. ʻOku fakapapauʻi ʻe he faitatau lelei ha aʻusia maʻu pe, fakafiemalie mo malu, ʻo fakaʻata ʻa e niʻihi ʻoku nofo ai ke nau tokanga taha ki heʻenau ngaahi ngaue ʻo ʻikai tohoakiʻi pe helaʻia ʻe honau ʻatakai ʻo e mama.

ʻOku uesia fefe ʻe he faitaha ʻa e fiemalie mo e malu ʻo e sio?

ʻOku malohi ʻaupito ʻa e fehokotaki ʻi he vahaʻa ʻo e faitatau mo e malu ʻi he ngaahi polokalama hange ko e maama hala mo e ngaahi feituʻu ngaue. ʻI ha hala, ʻoku feʻunuʻaki maʻu pe ʻa e mata ʻo e fakaʻuli ki he feliliuaki ʻa e maama ʻi muʻa. Kapau ʻoku ʻikai ke faitatau ʻa e hala—ʻa e ngaahi konga ngingila ʻi lalo ʻi he pou takitaha mo e ngaahi luo loloto mo fakapoʻuli ʻi hona vahaʻa—ʻe lava ke uesia ʻa e vakai ʻa e fakaʻuli. ʻI heʻenau hu atu ki ha feituʻu fakapoʻuli, ʻoku kamata ke liliu honau mata ki he maama maʻulalo, ka ʻoku fakafokifa pe ʻenau fehangahangai mo ha maama ngingila, ʻo tupu ai ha ulo fakataimi mo e tuai ʻi he liliu. ʻE lava ke fufuuʻi ʻe he "mafu" ko ʻeni ʻo e mama mo e fakapoʻuli ʻa e ngaahi faingataʻa hange ko e lue lalo, fanga monumanu pe veve. ʻOku toʻo ʻe he faitatau maʻolunga ʻa e ola fakatuʻutamaki ko ʻeni ʻo e "zebra", ʻo ʻomi ai ha puipuituʻa maʻu pe ʻa ia ʻoku faingofua ange ai ke sio ki ha faʻahinga faingataʻa. ʻI ha feituʻu ngaueʻanga pe fale tukuʻanga koloa, ʻoku mahuʻinga ʻa e maama tatau ki he malu. ʻE lava ke fufuuʻi ʻe he ngaahi ʻata loloto ʻi he faliki ʻo e fale ngaue ʻa e ngaahi fakatuʻutamaki ʻo e hopo pe fakapuliki ʻa e ngaahi konga ngaue ʻo e ngaahi misini. ʻI he ngaahi ngaue ʻoku fie maʻu ki ai ha ngaahi fakaikiiki lelei, hange ko e fokotuʻutuʻu pe sivi, ʻe lava ke fakatupu ʻe he ʻikai tatau ʻa e mama ke ʻikai ke ʻi ai ha ngaahi mele pe fai ha ngaahi fehalaaki. ʻOku faʻa fakamahinoʻi ʻa e faitatau siʻisiʻi taha ʻoku fokotuʻu atu ki he feituʻu takatakai ʻo ha ngaue ko e 0.40 pe maʻolunga ange, ʻo fakapapauʻi ʻoku maama feʻunga mo tatau ʻa e feituʻu takatakai ʻi he tokotaha ngaue, ʻo fakasiʻisiʻi ai ʻa e faikehekehe ʻi he vahaʻa ʻo e ngaue mo hono puipuituʻa pea fakaʻehiʻehi mei ha fakatuʻutamaki.

Ko e ha ʻa e ngaahi fie maʻu angamaheni ki he uniformity ki he ngaahi polokalama kehekehe?

ʻOku fie maʻu ʻe he ngaahi ngaue mo e ngaahi ʻatakai kehekehe ʻa e ngaahi tuʻunga kehekehe ʻo e faitatau ʻo e mama. ʻOku fokotuʻutuʻu ʻa e ngaahi fie maʻu ko ʻeni ʻi he ngaahi tuʻunga fakafonua mo fakavahaʻapuleʻanga ke fakapapauʻi ʻa e tuʻunga siʻisiʻi taha ʻo e malu mo e ngaue. Ko e tuʻunga moʻui ʻi ʻIulope ki he maama ʻo e ngaueʻanga, EN 12464-1, ko ha sipinga lelei ia. ʻOku ne ʻomi ha ngaahi tepile fakaikiiki ʻo e ngaahi fie maʻu ʻo e mama ki he ngaahi ngaue taʻefaʻalaua, mei he ngaue fakalukufua ʻi he ʻofisi ki he ʻenisinia totonu. Ki ha ʻofisi angamaheni, ʻa ia ʻoku laukonga mo tohi ai ʻa e kakai, ʻe ala fie maʻu ʻe he tuʻunga moʻui ha U0 ʻo ʻikai toe siʻi hifo he 0.6 ʻi he feituʻu ngaue ʻi he taimi ni. Ki ha loki konifelenisi, ʻa ia ʻoku mahuʻinga ai ʻa e fetuʻutaki ki he sio, mahalo ʻe fie maʻu ha faitaha maʻolunga ange. ʻI he ngaahi feituʻu ngaueʻanga, ʻoku makatuʻunga ʻa e faitatau ʻoku fie maʻu ʻi he tonu ʻo e ngaue. Ki ha ngaue lelei mo fakaikiiki ʻaupito, ʻe lava ke tuʻutuʻuni ha U0 ʻo e 0.7 pe maʻolunga ange ke fakapapauʻi ʻoku ʻikai ha ngaahi ʻata te ne fakapuliki ʻa e ngaue. ʻOku toe fefeka ange ʻa e ngaahi fie maʻu ki he maama sipoti, tautautefito ki he ngaahi polokalama televisone. Hange ko ʻeni, ʻoku ʻi ai ha ngaahi fie maʻu pau ʻa e FIFA ki he ngaahi malaʻe vaʻinga ʻakapulu, ʻoku faʻa fie maʻu ʻa e U0 ʻo e 0.7 pe maʻolunga ange ʻi he malaʻe kotoa ke fakapapauʻi ʻoku lelei ʻa e fakamafola ʻo ʻikai fakahohaʻasi ʻa e kau vaʻinga mo e foʻi pulu. ʻOku ʻikai taʻeʻaonga ʻa e ngaahi tuʻunga moʻui ko ʻeni; ʻOku makatuʻunga ia ʻi he fakatotolo lahi ki he ngaue mo e malu ʻa e tangata, ʻo ʻomi ai ha tuʻunga mahuʻinga ki he kau faʻu mama mo e kau pule ʻo e fale.

ʻOku tauhi fefe ʻa e faitaha ʻi ha vahaʻa taimi?

Ko e taha ʻo e ngaahi faingataʻa ʻi he palani ʻo e mama ko e faitatau ʻoku ʻikai ko ha meʻa ʻoku tuʻu maʻu; ʻoku holoa ia ʻi he ʻalu ʻa e taimi. ʻOku hoko ʻa e holoki ko ʻeni ʻi ha ʻuhinga lalahi ʻe ua: ko e holo ʻa e maama mo e maumau fakafoʻituitui ʻa e mama. ʻI he motuʻa ʻa e ngaahi maama kotoa pe, ʻoku holo mamalie ʻenau mama. Neongo ia, kapau ʻe vave ange ʻa e holo ko ʻeni ʻi ha maama ʻe taha ʻi he maama kehe, ʻe uesia ʻa e faitatau. Ko e meʻa mahuʻinga ange, kapau ʻe ʻikai ola lelei ha maama ʻe taha ʻi ha maama lahi pe maama ʻe taha ʻi ha fola ʻo e multi-luminaire, ʻe lava ke ne fakatupu ha feituʻu fakapoʻuli ʻi he feituʻu, ʻo fakasiʻisiʻi ʻaupito ʻa e maama siʻisiʻi taha pea mo e faitatau. ʻOku fakaleleiʻi ʻeni ʻe he ngaahi tuʻunga moʻui ʻaki hono fakafehokotaki ʻa e faitatau ki he taimi-tepile ki hono tokangaʻi. Kuo pau ke aʻusia ʻa e fie maʻu ki he maama siʻisiʻi taha mo e faitatau siʻisiʻi taha ʻi ha faʻahinga taimi pe lolotonga ʻa e moʻui ʻa e fola. ʻOku ʻuhinga ʻeni ko e taimi pe ʻoku to ai ʻa e faitatau ʻi lalo ʻi he tuʻunga ʻoku fie maʻu—hange ko ʻeni, koeʻuhi kuo holo vave ange ʻa e maama siʻisiʻi taha ʻi he ʻavalisi koeʻuhi ko ha ngaahi maama siʻisiʻi ʻoku maumau—kuo pau ke fai hono tokangaʻi. ʻE lava ke kau heni ʻa hono fakamaʻa ʻo e ngaahi mama, ʻa ia ʻe lava ke toe fakafoki mai ai ha mama, pe fetongi ʻa e ngaahi maama ʻoku maumau pe maumau. ʻI he ngaahi fokotuʻutuʻu lalahi, ʻoku faʻa hoko ʻa e kulupu relighting (fetongi kotoa ʻo e ngaahi maama ʻi he taimi pe taha) ko e founga lelei taha ia ke toe fakafoki mai ʻa e tuʻunga ʻo e maama mo e faitatau ki honau ʻuluaki fokotuʻutuʻu, ʻo fakaʻehiʻehi mei he maama ʻoku ʻikai potupotutatau ʻa ia ʻoku tupu mei hono fetongi ʻo e feituʻu.

Ngaahi Tafaʻaki Mahuʻinga ʻo e Faitatau ʻo e Maama

ʻOku fakamatalaʻi fakanounou ʻe he tepile ko ʻeni ʻa e ngaahi tefitoʻi fakakaukau mo e ngaahi fie maʻu fekauʻaki mo e faitatau ʻo e mama.

Ko hono fakaʻosi, ko e faitatau ʻo e maama ko ha tafaʻaki mahuʻinga ia ka ʻoku faʻa ʻikai lava ʻo sio ki ai ʻo e tuʻunga lelei ʻo e mama. Ko e faikehekehe ia ʻo ha feituʻu ʻoku ongoʻi fiemalie mo malu pea mo ha feituʻu ʻoku ne fakatupu ʻa e ongosia ʻi he sio mo fufuuʻi ʻa e ngaahi fakatuʻutamaki ʻe ala hoko. ʻI he mahino kiate kinautolu ʻa e fakaʻuhinga ʻo e U0, ʻa e ngaahi tuʻunga moʻui ʻoku ne tuʻutuʻuni ia, mo e ngaahi ʻuhinga ʻo hono mahuʻinga, ʻe lava ke fai ʻe he kau fokotuʻutuʻu ʻo e mama, kau pule ʻo e fale, pea naʻa mo kinautolu ʻoku nau fakaʻaongaʻi ʻa e ngaahi tuʻutuʻuni ʻoku ʻilo lelei ange, ʻo faʻu ha ngaahi ʻatakai ʻoku ʻikai ngata pe ʻi heʻene maama lelei, ka ʻoku maama lelei mo potupotutatau.

Ngaahi Fehuʻi ʻOku Faʻa ʻEke Fekauʻaki mo e Faitatau ʻo e Maama

Ko e ha ʻa e faikehekehe ʻo e U0 mo e U1?

Ko e meʻafua angamaheni taha ko e U0, ʻa ia ʻoku fakaʻuhingaʻi ko e Emin / Eavg. Neongo ia, ʻoku ʻi ai ha metric, ʻoku faʻa ui he taimi ʻe niʻihi ko e U1, ʻoku fakaʻuhingaʻi ia ko e Emin / Emax (vahevahe siʻisiʻi taha ʻaki ʻa e maama lahi taha). Ko e U1 ko ha meʻafua fefeka ange, he ʻoku ne fakafehoanaki ʻa e feituʻu fakapoʻuli taha ki he feituʻu maama taha. Neongo ʻoku lahi ange hono fakaʻaongaʻi ʻo e U0 ʻi he ngaahi tuʻunga hange ko e EN 12464-1, ʻoku na fakatou ʻomi ha ngaahi fakakaukau mahuʻinga ki he tufaki tatau ʻo e mama.

ʻOku fakafuofuaʻi fefe ʻa e faitatau ʻo e maama ʻi hono fakahoko?

ʻOku fua ʻa e faitatau ʻaki hono ʻuluaki fokotuʻu ha grid ʻo e ngaahi meʻafua ʻi he feituʻu ʻoku mahuʻingaʻia ai. ʻOku fakaʻaongaʻi leva ha meʻafua maama calibrated ke fua ʻaki ʻa e maama ʻi he feituʻu grid takitaha. ʻOku fikaʻi ʻa e tuʻunga mahuʻinga siʻisiʻi taha (Emin) mo e ʻavalisi ʻo e ngaahi tuʻunga ʻulungaanga mahuʻinga kotoa pe (Eavg). Ko e tuʻunga tatau U0 ʻoku vahevahe pe ia ʻe Emin ʻaki ʻa e Eavg. Kuo pau ke lelei feʻunga ʻa e grid spacing ke maʻu ʻa e maama siʻisiʻi taha.

Ko e ha ʻoku mahuʻinga ai ʻa e faitatau ki he maama sipoti?

ʻOku mahuʻinga ʻa e faitaha ʻi he sipoti ki he ngaue ʻa e kau vaʻinga mo e fakamafola televisone fakatouʻosi. ʻOku fie maʻu ʻe he kau vaʻinga ha maama ke muimuiʻi totonu ʻa e ngaʻunu ʻa e foʻi pulu kae ʻoua naʻa mole ia ʻi he fakapoʻuli. Ki he TV, ʻoku hanga ʻe he ʻikai faitatau ʻo fakatupu ha maama mo ha fakapoʻuli ʻi he malaʻe, ʻo ʻai ke ngali taʻefakapalofesinale ʻa e fakamafola pea faingataʻa ai ke muimui ʻa e kau mamata ki he meʻa ʻoku fai. Ko e faitatau maʻolunga (angamaheni U0 ≥mo e 0.7) ko ha fie maʻu mahuʻinga ia ki he ngaahi polokalama televisone.