2012 / EN - OMS lighting
Contents
1. Effect of presents detectors on total investment cost Ascendancy of maintenance cycles on total investment costs Graphical analysis 1 3 System requirements LED CALCULATOR is web based and running on every operating system with internet browser e Minimum software requirements Operating system e Windows 95 or higher e Mac OS X Internet browser e Internet explorer e Mozilla Firefox e Safari e or other dedicated browsers for tablet computers 2 1 Web browser Open the web browser located on your desktop figure 2 1 1 OMS LED CALCULATOR 233 234 Mc CALCULATOR Figure 2 1 2 Internet explorer Please type in the address field Figure 2 2 1 User name and password request Please enter your user name and password to log in to OMS LED CALCULATOR 3 LED CALCULATOR Figure 3 1 1 Parameter and report window The main window is separated in two parts Please type in the address field following link figure 2 1 2 and press ENTER http intranet oms sk OMSLC Pages Report aspx amp i j hitmc intranet em tek CIASLCJ Pag er Report aee D X 1 Google Suche Hiki Address field 2 2 User name and password Aut qut Gaci Right after following the link appears an input box figure 2 2 1 which is asking for user name and password For your personal login information please contact sales at OMS Verb vdure wird hirgestallt mit inbrangt cena gk I IEerutrem2. CRI generally appear more true to life AER 4 1 7 Bs Dp t DOG ODE w or E m m om x J c degness kelvin is independent of the Color Rendering Index Color Temperature The absolute temperature of a blackbody radiator having a chromaticity equal to that of the light source egrees Type of Indoor 3200k Outdoor 5500k vin Light Source Color Balance Color Balance 1700 1800K Match Flame 1850 1930K Candle Flame Sun At Sunrise or Sunset Household Tungsten Bulbs Tungsten lamp 500W 1k 3200 3500K Quartz Lights 3200 7500K Fluorescent Lights 3275K Tungsten Lamp 2k 3380K Tungsten Lamp 5k 10k 5000 5400K Sun Direct at Noon Daylight Sun Sky Sun through clouds haze Sky Overcast 8500K RGB Monitor White Pt TOO0 BODOK Outdoor Shade Areas 8000 10000K Sky Partly Clouc Lumen Lumen is the basic unit for measurement of light A dinner candle puts out about 12 lumens A 60 watt bulb is much more powerful and provides 855 lumens If a uniform point source of 1 candela is at the center of a sphere of one foot radius which has an opening of one square foot area at its surface the quantity of light that passes through is exact one lumen 200 150 100 50 LED T8 T5 HO High Metal Metal halide Fluorescent Fluorescent Pressure halide Sodium Pulse Start Lumens Per Watt Ipw A measure of the efficacy of a light source in terms of the light produced for the
3. Net kamer output rn ATTENTE Pe get corem roping n prodiere rtrd Technical specification of first selected luminaire Calculed values of first selected luminaire Diagram and payback comparison of selected luminairea 3 7 Detailed explanation of report window 1 Basic information 1 and 2 Luminaire e Manufacturer producer of the luminaire e Type E g DOVVNLIGHT SPOT GRIDLIGHT e Product name Name of product e g CASTOR e Color temperature 4000k 3000k see glossary e CRI color rendering index e g 80 83 see glossary e Lumen output e g 2000lm 7 3000lm see glossary USER MANUAL OMS LED CALCULATOR 2 Detail technical information 15 and 2 Luminaire Lumen output light source measured This value shows the measured lumen output from the light source without losses from driver 7 ballast and optic Wattage This value represents the system wattage of the luminaire including losses on driver or ballast Light source efficacy This value is calculated by lumen output light source measured and the wattage called efficacy of the light source in lumen 7 watt Im w LOR Light Output Ratio Optical efficacy for detailed information please see glossary System efficiency This value indicates the overall efficiency of the luminaire including all losses driver ballast optic thermal Net lumen output from luminaire This value is the lumen output from the luminaire in
4. coefficient 1 2 Daylight sensors significantly influence the overall operating costs of installed luminaires These detectors check the daylight situation and control the luminous flux according to the natural light If it is sunny outside the sensor reduces the light output to a minimum level which saves a lot of energy opposite luminaires without Please check sensor setting table with different combinations of sensors for your individual calculation Default value is 1 Present detector coefficient 1 2 Presence detectors sense continuously any movements next to the luminaire In case of no activities in the defined area the luminaire dim down or switch off automatically This results to additional energy savings Please check the sensors setting table with different combinations for your individual calculation Default value is 1 Days per year This field represents the operating time per year Default value is 365 Hours per day This field represents the operating time per day Default value is 12 3 4 Sensor settings Depending on application the use of sensors reduce the power consumption effectively Unfortunately the values are varying a lot in praxis The exact calculation is only possible if you know the installation and application parameters In case you do not know them put there indicative values Motion detector Motion sensors are often used in indoor spaces to control luminaires If no movement is detected
5. it is assumed that the space is empty and thus does not need to be lit Turning off the lights in such circumstances can save substantial amounts of energy In lighting practice occupancy sensors are sometime also called presence sensors or vacancy sensors Occupancy sensors for lighting control use infrared IR or microwave technology or a combination of the two The field of view of the sensor must be carefully selected adjusted so that it responds only to motion in the space served by the controlled lighting For example an occupancy sensor controlling lights in an office should not detect motion in the corridor outside the office Sensors and their placement are never perfect therefore most systems incorporate a delay time before switching This delay time is often user selectable but a typical default value is 15 minutes This means that USER MANUAL OMS LED CALCULATOR the sensor must detect no motion for the entire delay time before the lights are switched Most systems switch lights off at the end of the delay time but more sophisticated systems with dimming technology reduce lighting slowly to a minimum level or zero over several minutes to minimize the potential disruption in adjacent spaces If lights are off and an occupant re enters a space most current systems switch lights back on when motion is detected However systems designed to switch lights off automatically with no occupancy and that require the occupant to switch
6. D i Cale ps ln r Pa i EB Sew Cele Gr 3 UAE AB Lem Cr Lon 100 5 Liens Eo Mowe Sytiem fon ci BO SF Haitenance pein 23 irem Sate ef cin Lames Mainaarasca cycis faa A Ces hh ies Din deir Tiitel Sty ef prit inci LLMP 22 Fx The help menu gives access to the user manual and glossary You find it on the upper right side After click the help window pops up to open the glossary or the user manual ARTE w Oms LED S compare V1 0 help Windows Internet Explorer Name Glnssany User manual diea ab ads mu OMS LED CALCULATOR 241 6 Glossary Lighting terminology for OMS LED CALCULATOR Figure 6 1 1 Colour Rendering Index Figure 6 1 2 Colour Temperature Figure 6 1 3 Energy Efficient Lighting LUMEN WATT Source Paragon Lighting and Green Ecometrics research Energy efficient lighting fixtures such as LED are provide twice the lumens per watt of electricity than legacy metal halide fixtures Examples Edison s first lamp 1 4 lpw Incandescent lamp 10 40 lpw Fluorescent lamps 35 104 lpw Halogen lamps 20 45 lpw Mercury lamps 37 63 lpw Metal halide lamps 80 125 lpw High pressure sodium lamps 54 153 lpw 242 Color Rendering Index CRI Color rendering is measured on an index from 0 100 Natural daylight and incandescent lamps have CRI 100 It describes the ability to reproduce colors by an object Objects and people viewed under lamps with a high color rendering index
7. GHER INITIAL COSTS d YEARS Cages dir i OPERATING 388 DAYS AT ti HOURS PER DAY ATTENTION cce a rar r hi kyq calcio USER MANUAL OMS LED CALCULATOR Figure 4 1 1 Print Figure 4 2 1 Export Following file formats are supported XML CSV PDF MHTML Excel HFF Word 5 Help menu Figure 5 1 1 Figure 5 1 2 4 1 Print This function sends the report directly to the installed printer After click appears the standard print window which you know from other windows applications OMS LED Calculator Alone oms an Print xh Mangtaciuror Typa Product nama Light source Coder l m p r ndara CRI Lumen utpiut Luman autput lighd BOLTE moa un Wiat aga fa Light source efficacy TEO LOR a6 5ysirm efficiency Mo Air condition Presents detection Daylight Calal Oty of products inci LLMF a Furia dz haman dp cf dai cin inba irvesimert costs 1152 MET rergy costs eg a rengy cont Meducters AC PD Def B amp aim Redectond IAC PO DSi 4 2 Export peice ec p r h cue pe Li Doo Howes ca cycle d times tq facter he MF ot 532908 Optical efficacy sh T S a This function exports the report to different file formats OMS LED Calculator Akit Frini XML file with report data LED S compare V1 0 Export k CSV cammn delimited Manutecturet dag Type HTML wel archive Type DOWNLNSHT we Product nema Excel SHED Product namer D SHUGHT SOLA
8. Nd CLOC 232 CALCULATOR OMS LED CALCULATOR USER MANUAL Table of content 1 Prologue 1 1 What is LED CALCULATOR 1 2 What for you need LED CALCULATOR 1 3 System requirements 2 VVhere you can find it and how to log in 2 1 Web browser 2 2 Username and passwort 3 LED CALCULATOR 3 1 Overview MAIN WINDOW 3 2 Parameter window 3 3 Detailed explanation of parameter window 3 4 Sensor settings 3 5 How LED luminaires influence air condition systems 3 6 Report window 3 7 Detailed explanation of report window 4 Print and Export 4 1 Print 4 2 Export 5 Helo menu 6 Glossary Lighting terminology tor OMS LED CALCULATOR USER MANUAL OMS LED CALCULATOR 1 Prologue 2 Where you can find it and hovv to log in Figure 2 1 1 Windows 7 1 1 What is LED CALCULATOR LED CALCULATOR is a user friendly web based software specially written to compare luminaires with classic and LED based light sources It matches different economic environmental and technical data like CO consumption system power maintenance cost influence on air condition systems and many more 1 2 Why you need LED CALCULATOR LEDCALC supports to visualize the advantages of LED based luminaires A lot of information are displayed and calculated Payback time Energy consumption in a certain time period Influence of LED based luminaires on air condition systems Impact of daylight sensors on total investment costs
9. R p Light miu ro TIFF file a Light source LED NEL a o amt Word Color temperabure 4000 K CRI I cm Ba Lamin dit n S Lumer Lien egtput 2950 Lomen Lumen cutput ghl gaurck mda iag We Luminaire price zB E Luman output lig t source mage 2950 b Luminar price 5 amp Wansga a4 Ww Geet for Kght source T T NA E zh WoO Co far light source Light aa re afiesey TEO Lom Celer sa nale T VACATE Light source efficacy i ie Color eonalatanes 3 ACAD LOR ta Lifetime 15000 Hog LOR 100 Lipie 5o Hours System afficlency 400 ee Malnienanca cycla 23 times Sysiom pfiiciency B4 Le 5 Maknteeanco cycia times biet jumen output from haminaire Fer i MalnBenanece factor as MF Mat lumen output from luminaire 2052 Low Maintenance factor ae WF Air condition Presents detection Daylight sensor II Sh Air condition Presents detection Daylight sensor ed HSLOR Calcul Gty of products inci LEME x PCS i Calcul Qty of products incl LLM 222 PCR i BiBi bi Marsi d uw Tab icia J Optical efficacy Faia ihnen adum of tet asieciion O0 Optica efficacy Ira ars rer cost 1152 a Wr u awe ment cost Tre a Eron costa Fat amp Energy costs aT E Recvciions AC PD OS 0 c ali Reductions AC PO DS DI a OMS LEO Cabrales BUCH ems LED S compare V1 0 buses e eis HE Enable ARE iso Leena price HB kush Oe Egli Rings rubei PD L pel Ll l L Mili Wo emita ight eee T E kian agh a WO Casi Por ight sere 5 Li deg t mre ci T ky TE
10. ane 3 1 Overview main window Parameter window This section allows the luminaire choice for the comparison Additional you are able to do several manual entries to specify the frame conditions of the calculation Report window This view shows all selected parameters from the luminaires and the results of the calculation in an alohanumerical and graphical way rth UDIP Cipa ade Shim oms FA Rs Th LED To aT Re es hl IT L TEAMA Bas BE ATO Gp Dea FUR DAT USER MANUAL OMS LED CALCULATOR LE een j mi anain a faal ipaa pb uirum i aaa scam a cma E P aka 1 orm paa i m Lessee i ano ome T H urna ee Esca Hl i Figure 3 2 1 Parameter and report window LED CALCULATOR will be updated continuously by OMS so that you are able to compare always the latest OMS LED luminaires 3 2 Parameter window From the drop down menu you can select two luminaires This menu is frequently updated by OMS with the latest information and with new luminaires The data of the fixtures in this software are based on real photometric measurements Enter price of ight source 1 luminaire Lumiere gece 2 T Enter price 2nd luminaire Lamp prae 2 e price af ght T Currency al J T Basic Qty of first Product 20 l Energy price F 0 1 Main tencce work price alf 25 Maintenance work time both Ex Evaluation p
11. ck time due to higher initial costs of LED fixtures The crossing of the graphs show the breakeven point that means after how many hours of operation the system is profitable compared to the second luminaire The print and export function provides several possibilities to publish the result On the upper right corner you find the action button Chose from the drop down menu PRINT or EXPORT OMS LED Calculator Akoe Selection 2 pu DOWNLIGHT ECOWNLIGHT amp 221 POLIEHED FSMH TC TEL se KAN 3000 amp ino i Luman o pale ig ONE mom fla al d ul T50 bar Light source efficacy ap B LOR Syriom efficiency Me Air comdition Presenta detection Daylight sensar System affiiancy Met lumen eutpul From lumina Air condition Presents dega Daylight sensor Calcul Qty of products incl LL Rr Ratio in humeri auge iy ai elcin 25 Kral ires eet Oo 1152 Enenpy coats Mairipracca Total costs Calcul Oty of products inci LLMF 222 PCS Riis ie umen dpud af iui bech an Us Initial irastment posts TTE Energy coats Marim aren o Toim costa TOLM pow consumim Teia peraner do nase teen Teta Co amiasion Lise time hors Limied giare ranig COST SAVING UMTS EUR CO2 RAVING j5 8 TOHB System efficoeney n Net lumen cutput im EX 28 Bo ues toot 20 25000 5 3008 16 Selection p I xe 1000 8 1 s ze 6 p i _ b 6 BXO Lu M rs x e hip ag Sag Mgt ing i D ns s PAYRACK TIME RELATED TO HI
12. cluding all losses Luminaire price This value displays the price of the luminaire which was defined in the parameter view Cost for light source This value displays the price of the light source e g the price of an incandescent bulb or a T5 tube which was defined in the parameter view Color consistence For detailed information please see glossary Lifetime This field displays the evaluated average lifetime of the light source Classic lamps have an average lifetime between 2000h 20 000h LED s between 50 000h 100 000h Maintenance cycle This calculated value displays how often the luminaires have to be maintained during the evaluation period maintenance includes changing of light source cleaning and other operations which keep the luminaire functional Maintenance factor This value is preset for classic light sources 0 8 and for LED light sources 0 9 Air Condition This value is displayed from the parameter field and depends on air condition systems and type of installed luminaires Present detection This value is displayed from the parameter field and depends on usage of present detection systems Daylight sensor This value is displayed from the parameter field and depends on usage of daylight sensors 3 Calculated values 15 and 2 Luminaire Calcul Qty of products incl LLMF see glossary for lamp lumen maintenance factor LLMF This field displays the quantities of installed luminaires in ratio of the n
13. e which is equipped with TC TEL light source has a power consumption of 2x32W 64W total and a installed lumen package light source of 3600Im The electronic control gear needs 2W additional The light output ratio is 100 This results in a net lumen output of 4800 lumens and a system efficiency of 75 0lm per watt On the other side we have a luminaire which is equipped with an LED module and has a power consumption of 46W in total inclusive driver The light output ratio is 100 according the latest regulation for photometric measurements LOR for LED based luminaires are always mentioned in 100 On this example we have a net lumen output of 2950 lumens and a system efficiency of 64 1lm per watt OMS LED CALCULATOR Zot 238 22 CALCULATOR Figure 3 6 1 Report window Basic information about 1st and 2st selected uminaire Technical specification of first selected luminaire Calculated values of first selected luminaire Diagram and payback comparision of selected lumi naires It means with a LED equipped luminaire we need a significant lower power consumption to achieve the same net lumen output For a room with 10 pcs of luminaires equipped by 2x32W TC TEL you need 640W electrical energy Only 20 of the electrical energy is transformed into light 80 is transformed to thermal energy This thermal energy in the amount of 512W has to be cooled down by air condition system Opposite is a room w
14. erisd nj 50000 um Time period of calculation Air Cond koet 1 T Insert th tene which i needed ro maintiin one luminaire Insert the influence of first luminaire on air condition Daylight senzor koci 1 i insert the influence of first luminaire daylight sensor Present detect kos 1 1 insert the infigence of first present detector Deyiight senro koef 2 Presenk detect bosi 2 Days b r Yaar t s Hoari per Day iz 3 3 Detailed explanation of parameter window Product 1 Select luminaire 1 from the drop down menu Product 2 Select luminaire 2 which you want to compare with product 1 Luminaire price 1 Insert the selling price of the first luminaire Lamp price 1 Insert in case of a luminaire with classic light sources the purchase price from the light source Attention Some luminaires have two or more light sources in this case please count with the total price Luminaire price 2 Insert the selling price of the second luminaire Lamp price 2 See LAMP PRICE 1 Currency Insert country specific currencies which are important for international business activities Default value is OMS LED CALCULATOR 235 236 22 CALCULATOR Basic quantity of first product Insert the quantities of products which are needed for a certain room size ATTENTION Exact quantities are necessary to be confirmed by professional lighting calculation Default val
15. et lumen output from the first selected luminaires taking into account also the LLMF Initial investment costs This field displays the initial investment costs of the luminaires Energy costs This field counts the costs for energy consumptions during the operation time evaluation period Reductions AC PD DS This field displays the energy savings on air condition systems savings based on present detections and daylight sensors Maintenance This field displays the cost of maintenance during evaluation period Total costs This field shows the summery of all costs after the evaluation period OMS LED CALCULATOR 239 240 d m CALCULATOR Figure 3 1 1 Diagram output 4 Print and Export 4 Diagram output 1 and 2 Luminaire TITTGLBTSEUR DOZ SAVING 354 TONS Met lumea output m PATBACK TIME RELATED TC HIGHER INITIAL COST amp YEARS OPERATING 385 DATS AT 12 HOURS PER DAY ATTENTHQNM Tri feat on Pa aii oh eel haga a System efficiency Displays the direct comparison of the efficiency from both selected luminaires Net lumen output Displays the direct comparison of the net lumen output from both selected luminaires Life time Displays the direct comparison of the lifetime from both selected luminaires Unified glare rating UGR see glossary Displays the direct comparison of unified glare rating from both selected luminaires Payback time diagram This diagram visualizes the payba
16. from luminaires Contrary to previous methods where the glare was rated using the luminance values of a single luminaire this method calculates the glare of the entire lighting installation at a defined observer position According to DIN EN 12464 the UGR reference value is provided for a standard room An exact calculation of the UGR value at a defined observer position in a room is possible with modern lighting design programs The lower the UGR value the lower the glare Where the luminance is lt 1500 cd m additional data is provided on the elevation angle either 65 This is the critical angle above which the luminaire should not exceed 1500 cdi m Efficacy Efficacy is the ratio of lamp lumens to the electrical power watts consumed Usually it is expressed in lumens per watt System efficiency includes ballast losses Lamp lumen maintenance factor The lamp lumen maintenance factor LLMF takes into account the reduction of luminous flux due to the ageing of the lamp It signifies the ratio of the lamp lumens at a specific time and the new value The current data provided by the lamp manufacturers must be taken into account here 96 Rated Lumen Output Metal aide 0 5 000 10 000 20 000 40 000 60 000 80 000 High Power LED D ses os B ENI Sodium ES 100 000 Burning Hours OMS LED CALCULATOR 243
17. ith 10pcs of luminaires equipped by a 46W LED module in total 460W power consumption Let s calculate because efficacy of an LED is higher that 3096 of electrical energy is transformed into light and 7096 is transformed into heat In this case the air condition system has only to cool down additional 322W thermal energy Conclusion Difference of 190W which do not need to be cooled down 3 6 Report window Basic information about 1 selected luminaire Basic information about 2 selected luminaire OMS LEG Calculate Akte OS LED S compare V1 0 GIN LIGHT DOWNLIGHT 5 221 POLIG HED FENH TC TEL eta 4000 X a i20 Lumer Lumen oulpul lighlacurce mea SEDI Lo Luminaire price 2 E Warage Be W Cont fer light soume E Light source elificacy T amp D lame Color consistence 7 nia s sia LOR Lifetime 3000 LOR System aflichens 7 Perey br a Hot hamon output from haminalre an Met fumen euliput from bam liairo Air ennditian Presanta detection ON erm Alp cnnditian Preaends detection Daylight s r Calcul Qty of products irc LLMF i Calcul Qty of products incl LLMF mz IL ea ud e T ain E Haia bz docui cma Od dar dab eter E Kral gri cod 1154 Iritial irse orant coni 1r78 Energy cosia HE Exergy cosis Biro Reduesons AC PD DS BM Marearen 6 Teial costs Tein power Gonmumtion Calor con amp istenci Tetal Co emisalon TITHLETSEUR CO SAVING MATOS sunm efficiency Dm
18. lights on when they re enter are gaining in popularity due to their potential for increased energy savings These savings accrue because in a space with access to daylight the occupant may decide on their return that they no longer require supplemental electric light Daylight sensors Several studies have recorded the energy savings due to daylight harvesting Savings are very dependent on the type of space the light harvesting control system is deployed in and its usage Clearly savings can only accrue in spaces with substantial daylight where electric lighting would have been otherwise used Therefore daylight harvesting works best in spaces with access to conventional or clerestory windows skylights light tube groups glass block walls and other passive day lighting sources from sunlight and where electric lighting would otherwise be left on for long periods Such spaces have included offices atria interior public multistory plazas and shopping mall courts and schools However studies have shown that by using daylight harvesting technologies owners can see an average annual energy savings of 30 TYPE OF DIMMING DAYLIGHT DEPENDENCY FACTOR OCCUPANCY DEPENDENCY FACTOR NO DIMMING 1 1 PRESENCE MOTION DETECTOR 1 0 9 DAYLIGHT SENSOR 0 8 0 9 PRESENTS MOTION amp DAYLIGHT SENSOR 0 72 0 72 No dimming Customer has no sensors installed In this case fill all fields with 1 Presence motion detector Customer has a presence o
19. power consumed For example a 100 watt lamp producing 1750 lumens gives 17 5 lumens per watt Net lumen output Describes the lumen output including all losses from reflector diffuser etc Light output ratio LOR According to DIN EN 13032 2 the LOR Light Output Ratio describes the ratio of the luminous flux of the luminaire to the lumens of the lamps used Luminaires with direct indirect emission also specify the DLOR Downward Light Output Ratio and the ULOR Upward Light Output Ratio as separate components These indicate the light intensity distribution of a luminaire in the lower and upper parts of the room NOTE According the latest regulation for photometric measurements LOR for LED based luminaires is always mentioned in 100 USER MANUAL OMS LED CALCULATOR Figure 6 1 4 Color consistency The colors of a hot air balloon are recognized as being the same in sun and shade Figure 5 1 5 MacAdam ellipses for one of MacAdam s test participants Perley G Nutting Jr observer PGN plotted on the CIE 1931 xy chromaticity diagram The ellipses are ten times their actudl size as depicted in MacAdam s paper Figure 5 1 5 Lumen maintenance curves for various Commercial light type OS Color consistency MacAdam ellipses Color constancy is a part of the visual perception system which allows people to perceive color in a variety of conditions and to see some consistency in the color An apple which is
20. r motion detector installed In this case fill this field with 0 9 if the area of installed luminaire is not frequently in use e g corridor in a hotel The luminaires are automatically switched on if someone is entering this area Daylight sensor Customer has a daylight sensor installed In this case you can fill this field with 0 8 3 5 How LED luminaires influence air condition systems The fact that LED luminaires have usually a higher efficiency opens the possibility to save energy on air condition sytems which is a perfect selling argument too OMS LED Calculator ANDE enege LED S compare V1 0 En 2 Selection 1 Manin CLES Manutscnures DRE Type DCWINLIGHT Typ DCFNWHLIGIHT Product name DOWNLIGHT 221 POLIGHED y Product name DOWNLIGHT SQUARE Light source FSMH TC TEL beat Be M Light source LED La Color temperature 4000 X Gelar temperature 4000 K CRI a CRI a Luman auiput i20 Lumar Lumen output 2E Lumec Lumen dul peut gle aures miki 2300 Lm Luminaire price 29 E Lumen output Hight e urce misi 2950 me Luminaire price gn E Warlage Ba W Cost for light soures r Mart E Cast for light source 0 Light source elificacy T amp D lame Color consistence T oi d ia Ligh souna elficacy 43 Lee Color consistance 3 VASA Lor Er Lifetime 18000 Hows LOR tho Lifetime d Hours Compared are two downlights left side with 46 W LED light source and on the right with 2x32W FSMH TC TEL The luminair
21. red in the bright morning sunlight will also appear red under candlelight and in the late afternoon when the wavelengths of the light available are actually very different Likewise if the apple is partially in the sun and partially in the shade an observer will read the entire apple as red This allows someone to recognize the apple even though the conditions have changed with the eyes perceiving the color as relatively constant MacAdam set up an experiment in which a trained observer viewed two different colors at a fixed luminance of about 48 cd m One of the colors the test color was fixed but the other was adjustable by the observer and the observer was asked to adjust that color until it matched the test color This match was of course not perfect since the human eye like any other instrument has limited accuracy It was found by MacAdam however that all of the matches made by the observer fell into an ellipse on the CIE 1931 chromaticity diagram The measurements were made at 25 points on the chromaticity diagram and it was found that the size and orientation of the ellipses on the diagram varied widely depending on the test color These 25 ellipses measured by MacAdam for a particular observer are shown on the chromaticity diagram Unified glare rating UGR The UGR method Unified Glare Rating is an international index presented by CIE in publication 117 and is used to evaluate and limit the psychological direct glare
22. ue is 20 Energy price This value is important when you know the exact energy price per kilowatt from the country of installation to calculate the energy cost differences between the selected luminaires Default value is 0 2 kW Maintenancance work price The maintenance work price is the cost for maintaining the installed luminaires This value shows the customer the difference between a classic light source which has to be changed continuously and a LED light source which is almost maintenance free The work price is in every country different this depends on different labor costs Additional lifting devices may be needed for higher installations don t forget to add these costs here in this field too Default value is 25 h Maintenancance work time Maintenance takes time which is a big cost factor in servicing Think about office buildings or shopping centers with thousands of luminaires which have to be maintained continuously The maintenance value has to be added in hours e g for 30 min per luminaire you write 0 5 in the field Default value is 0 25 for 15 min Please think about manipulation times if you are using special lifting devices Evaluation period It describes the time period for the comparison in hours Because of the minimum LED lifetime the default value is 50 000 hours Air condition coefficient 1 2 Please check How LED luminaires influence air condition systems Default value is 1 Daylight sensor
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