http___www.xledlight.com_ga_soilse-fead_C3_A1n-faoi-sti_C3_BAir-t8-150lm.html_1.xml
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150 lumen per watt Led Tube lights 150 lumen per watt Led Tube lights – Not that there is anything wrong with the old sodium-discharge lamps. Producing practically all their light at a wavelength near the peak sensitivity of the human eye gave them a theoretical luminous efficacy of 200 lumens per watt of electricity consumed, though their real-world performance is around two-thirds that. The new white LEDs used in his street are rated at around 100 lumens per watt. Compact fluorescent lights (CFLs) used in the home produce 60 lumens per watt, while traditional incandescent bulbs emit a miserly 15 or so. In terms of energy savings, then, LED streetlights are contenders but not champs. But they have other advantages. One is longevity: they simply do not burn out, but gradually lose their brightness over the years. T8 Led Tube lights 18W The usual measure of an LED lamp’s economic life is its L70 rating—the time taken for its brightness to fall to 70% of its original value. Municipalities and commercial users expect to get ten years or more from LED lamps before that happens. Low-pressure sodium lamps, by contrast, last typically three or four years before starting to consume lots more power. Add to this the cost of changing an LED streetlamp—around 60, versus over 200 for a sodium lamp—and the lower maintenance costs alone can make the switch worthwhile. There are performance benefits, too. Unlike sodium lamps, LEDs turn on immediately, rather than taking minutes to warm up. They are also better at displaying colours. And recent research has shown that white light provides better visual perception than yellowish-orange sodium light. This stems from the way different photoreceptor cells in the eye, called rods and cones, perform their different tasks. T8 Led Tube lights 18W In daylight, vision is handled largely by cone-shaped cells packed around the centre of the retina. Apart from processing colour, cone cells help the eye perceive detail and rapid changes in surroundings. In the dark, by contrast, perception is handled almost exclusively by the more sensitive rod-like cells towards the retina’s periphery. For people driving at night, however, artificial lighting means conditions are usually neither pitch-dark nor light enough to see using cones alone. T8 Led Tube lights 18W Moreover, as a vehicle moves through patches of lighter and darker illumination, both rods and cones are required, and the demands on them change constantly. When it is briefly lighter, the eye is more sensitive to greenish-yellow light. When darker, it responds best to light in the greenish-blue part of the spectrum. It turns out that white LED lamps do a better job of meeting these conflicting requirements than sodium lamps can manage—and they do it at lower power levels, to boot. There could therefore be some energy savings from switching to LED streetlights after all. T8 Led Tube lights 18W Lighting accounts for roughly 17% of the electricity used in the United States. Reducing waste—through the introduction of solid-state technologies that convert a lot more of the energy into light—would cut that figure. LEDs convert more than 75% of the energy they consume into light; incandescents no more than 5%, the rest being turned into heat. An American law passed in 2007 required that light bulbs consuming 100 watts or more should use 27% less electricity by 2012. Bulbs rated at 40 watts and up would have to do the same by 2014. T8 Led Tube lights 18W Although some of the latest incandescent bulbs could more than meet the new efficiency standard, traditional tungsten-filament bulbs did not stand a chance. Meanwhile, CFLs had begun to acquire a poor reputation. Few lived up to their claim of longer life, especially when they were switched on and off repeatedly, or used in recessed ceiling lights where heat could build up and fry their circuitry. And though LED bulbs have a total-cost-of-ownership significantly less than that of sodium or other forms of industrial lighting, and have proved their worth to municipalities and businesses, they have yet to do the same for residential users. T8 Led Tube lights 18W That is hardly surprising, given an upfront cost of anything from 25 to 60 (before possible rebates from electricity suppliers) for an LED bulb with the luminous flux of a 100-watt incandescent light. Your columnist plans to upgrade his original 4.2 kilowatts’ worth of domestic indoor and outdoor lighting with LED equivalents, one lamp at a time, as the existing bulbs (mostly compact fluorescents) burn out. Replacements for 100-watt floodlights tend to cost around 40 a piece. But the popular 60-watt-equivalent can now be had for as little as 14. T8 Led Tube lights 18W Getting cheaper and smarter Not all LED lamps, however, are created equal. Some of the cheaper ones have a chilly blue cast. None has quite the full complement of colours of the profligate tungsten-filament bulb, with its wide palette of wavelengths in the visible spectrum. The usual measure of a light source’s ability to reproduce colours faithfully is the Colour Rendering Index (CRI). By convention, incandescent bulbs are assigned a CRI of 100. Cheap LEDs can have a CRI of 50 or less. A really good one—such as the 45 xLedLighting T8 Led Tube lights 18W has a CRI of 90. Most LED Lights of Yuchi Industrial have CRI of 80 to 85. T8 Led Tube lights 18W
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Soilse 150 lumen in aghaidh an bhata faoi stiúir an fheadáin 150 lumen per watt Led Tube lights - Nach bhfuil aon rud cearr leis na sean-lampaí urscaoilte sóidiam. Agus iad ag léiriú go léir a gcuid solas go praiticiúil ag tonnfhad in aice le buaic-íogaireacht an tsúil dhaonna thug siad éifeachtacht teoiriciúil shoiléir dóibh 200 lumens in aghaidh an bhata leictreachais a úsáideadh, cé go bhfuil timpeall dhá thrian acu ar fheidhmíocht an domhain. Tá na soilse nua bán a úsáidtear ina sráid rátáil thart ar 100 lumens in aghaidh an bhata. Tharlaíonn soilse fluaraiseacha dlúth (CFLanna) a úsáidtear sa bhaile 60 lumens in aghaidh an bhata, agus bíonn bolgáin thraidisiúnta traidisiúnta ag teachtadh 15 mícheart nó mar sin. I dtéarmaí coigilteas fuinnimh, ansin, is é iomaitheoirí buaicphointí LED ach ní champs iad. Ach tá buntáistí eile acu. Tá ceann amháin ar feadh an tsaoil: ní sruthóidh siad ach ní chailleann siad a gile thar na blianta de réir a chéile. Luaidhe Tube faoi cheannas T8 18W Is é an gnáthbheart a bhaineann le saol eacnamaíochta lampa stiúir ná a rátáil L70 - an t-am a thógtar chun a gile titim go 70% dá luach bunaidh. Táthar ag súil le deich mbliana nó níos mó a bheith ag úsáideoirí bardas agus tráchtála ó lampaí LED roimh a tharlaíonn sin. De ghnáth, tá lampaí sóidiam-bhrú íseal, de ghnáth, trí nó ceithre bliana de ghnáth sula dtosaíonn siad ag go leor cumhachta a ithe. Cuir leis seo an costas atá ag athrú sráidelapa faoi stiúir-timpeall 60, i gcomparáid le 200 le haghaidh lampa sóidiam-agus is féidir leis na costais chothabhála níos ísle féin an t-athrú a dhéanamh fiúntach. Tá sochair feidhmíochta ann freisin. Murab ionann agus lampaí sóidiam, téann na soilse ar aghaidh láithreach, seachas miontuairiscí a thógáil. Tá siad níos fearr freisin ag dathanna a thaispeáint. Agus léirigh taighde le déanaí go dtugann solas bán dearcadh níos fearr amhairc ná solas sóidiam buí-oráiste. Tagann sé seo ó na cealla photoreceptor éagsúla sa tsúil, ar a dtugtar slata agus cóin, a gcuid tascanna éagsúla a chomhlíonadh. Luaidhe Tube faoi cheannas T8 18W I solas an lae, déantar na cealla a láimhseáil go príomha le cealla chruthach-chruthach a phacáil timpeall lár an reitine. Seachas dath a phróiseáil, cabhraíonn cealla cón mionsonraí agus athruithe tapa sa timpeallacht. Sa dorchadas, i gcodarsnacht leis sin, déantar an dearcadh a láimhseáil beagnach go heisiach ag na cealla slí níos íogaire i dtreo imeall an reitine. I gcás daoine a bhíonn ag tiomáint ar an oíche, áfach, ciallaíonn soilsiú saorga nach mbíonn coinníollacha dorcha ná solas go leor chun coiníní a úsáid ina n-aonar. Luaidhe Tube faoi cheannas T8 18W Thairis sin, de réir mar a ghluaiseann feithicil trí phaistí de soilsiú níos éadroime agus níos dorcha, tá gá le slatanna agus le cóin, agus go n-athraíonn na héilimh orthu i gcónaí. Nuair a bhíonn sé níos luaithe níos éadroime, tá an tsúil níos íogair d'éadrom buí. Nuair a bhíonn sé níos dorcha, freagraíonn sé is fearr éadrom a dhéanamh sa chuid ghorm-ghorm den speictream. Tarlaíonn sé go ndéanann na lampaí faoi stiúir bán níos fearr post chun na riachtanais choimhlintí sin a chomhlíonadh ná mar is féidir le lampaí sóidiam a bhainistiú - agus é a dhéanamh ag leibhéil chumhachta níos ísle, chun tosaithe. D'fhéadfadh go mbeadh roinnt coigilteas fuinnimh ann ó aistriú go sráidelights LED tar éis an tsaoil. Luaidhe Tube faoi cheannas T8 18W Is ionann an soilsiú ar feadh thart ar 17% den leictreachas a úsáidtear sna Stáit Aontaithe. Laghdú ar an bhfigiúr sin laghduithe dramhaíola trí theicneolaíochtaí daingean-stáit a thabhairt isteach a chuirfeadh a lán níos mó den fhuinneamh i bhfianaise. Tiontaíonn soilse níos mó ná 75% den fhuinneamh a úsáideann siad i bhfianaise; nach bhfuil níos mó ná 5%, agus an chuid eile á thiontú ina theas. Ba cheart go gceanglódh dlí Mheiriceá a cuireadh isteach i 2007 go mbainfeadh XBXX% níos lú leictreachais 100 le huisce leictreachais 27 níos mó ná 2012. Ba cheart go ndéanfadh 40 na bleibíní a rátáil ag watta 2014 agus suas. Luaidhe Tube faoi cheannas T8 18W Cé go bhféadfadh cuid de na bolgáin ghránna is déanaí a bheith níos mó ná an caighdeán éifeachtúlachta nua a chomhlíonadh, ní raibh seans ann go raibh seansanna traidisiúnta tungstain-filament. Idir an dá linn, bhí tús curtha ag CFLs droch-cháil a fháil. Braitheann beagnach suas lena n-éileamh ar shaol níos faide, go háirithe nuair a aistríodh iad arís agus arís eile, nó go n-úsáidtear iad i soilse uasteorainn cíosa ina bhféadfadh teas a chiorcad a thógáil agus a fhrith. Agus cé go bhfuil costas úinéireachta iomlán i bhfad níos lú ná bolgáin faoi stiúir ná sóidiam nó foirmeacha eile soilsithe tionsclaíocha, agus gur fiú iad a bheith i mbailteas agus gnólachtaí, ní mór dóibh a bheith mar an gcéanna le haghaidh úsáideoirí cónaithe. Luaidhe Tube faoi cheannas T8 18W Is beag iontas é sin, mar gheall ar chostas tosaigh ar bith ar bith ó 25 go 60 (sula ndéantar lacáistí ó sholáthraithe leictreachais a d'fhéadfadh a bheith ann) le haghaidh bolgán faoi stiúir leis an fhuaim lonrúil de solas mórbhealaigh 100-bhata. Tá sé beartaithe ag do cholúnoir uasghrádú a dhéanamh ar a chuid soiléire citeavata 4.2 bunaidh de soilsiú intíre agus lasmuigh intíre le coibhéisí LED, lampa amháin ag an am, mar a dhóitear na bolgáin atá ann cheana (fluaraiseacha dlúth den chuid is mó). Is iondúil go gcosnódh athsholáthar le haghaidh fuíolluisce 100-bhata píosa thart ar 40. Ach is féidir an coibhéis 60-wat tóir a bheith ann chomh beag le 14. Luaidhe Tube faoi cheannas T8 18W Ag éirí níos saoire agus níos cliste Ní cruthaítear gach lampa stiúir, áfach, cothrom. Tá caitheamh gorm gorm ag cuid de na cinn is saoire. Níl comhlán iomlán dathanna ar bith ar bith ar bith den bholgán filament tungstain atá buailte, lena pailéad leathan tonnfhad sa speictream atá le feiceáil. Is é an bealach is gnách ar chumas foinse solais dathanna a atáirgeadh go dílis ná an Innéacs Rindreála Dath (CRI). De réir coinbhinsiún, cuirtear CRI de 100 ar na bolgáin ghránna. Is féidir go mbeadh CRI de 50 nó níos lú ag na soilse saor. Is maith an-mhaith an soilse 45 xLedLighting T8 Led Tube 18W Tá CRI de 90. Tá CRI de 80 go 85 ag an chuid is mó Soilse faoi stiúir Yuchi Industrial. Luaidhe Tube faoi cheannas T8 18W