Information for maintenance Theilluminanceforaroom/propertymustsatisfytheobligatoryentriesaccordingto124641overtheentireperiodofusage;thiscorrespondstothemaintenancevalue.Theelectricalplannerisresponsibleforoptimallydeterminingthemaintenancefactordependentuponthelightingsystemandthespatialconditionsusedandensuringthiswithamaintenanceschedule.MaintenanceFactorMF=LLMFxLSFxLMFxRMFLLMFLamplumenmaintenancefactorLSFLamplifetimefactorLMFLampmaintenancefactorRMFRoommaintenancefactorThenecessaryilluminanceofanewsystemresultswhenthemaintenancevalueisdividedbythemaintenancefactor.Anoptimallightingsystemisdistinguishedbyarelativelyhighmaintenancefactorandresultsinsavingsininvestmentcosts,inenergyconsumptionandinCO2emissions.Italsoensuresahighleveloflightingcomfortovertheentireservicelife.Whatpossibilitiesdoconsultantsandusershavetopositivelyinfluencethemaintenancefactor:RMFRoommaintenancefactorbrightroomscleanedatregularintervals,orpaintedinsuchawaythattheyhaveahighreflectioncoefficientoveralongperiodarethebasisforahighroomsurfacemaintenancefactor.LSFLampdurabilityfactorwhendefiningtheimmediatereplacementofdefectivelamps,themaximumvalueof1canbeusedforthisfactor.LLMFLamplumenmaintenancefactortakesintoaccountthedeclineofthebrightnessbecauseoftheagingofthelamporoftheLEDmodule.Throughtheoptimalchoiceofthelightswiththeappropriatelamps,theconsultantcandecisivelyinfluencethisvalue.Theselectionofilluminantswithalongservicelifeandalowdeclineinbrightnessreducesthecostsfortheprocurementofreplacementsandtheeffortinvolvedinchangingthelamps.LMFLampmaintenancefactordependinguponthedesignofalightandtheenvironmentalinfluencesintheproperty,contaminationcanoccurinthecourseofuse,whichresultsinreductionofthebrightness.Theuserisresponsibleforimplementation:CleaningofthelightsinadeenergisedandcoolstatewithasoftclothandpHneutralcleaningagents.Especiallythecleaningofcoveringsfortheradiationoftheindirectlightproportion,cleaningofallreflectors,wheretheyareaccessible,inthesamewayandcleaningofpanesandcoveringsfortheradiationofthedirectlightproportion.Byselectinglightsthatcanbecleanedwithloweffortandashortercleaningintervalthantheusual3years,ahigherluminairemaintenancefactorcanbeachieved,whichhasapositiveinfluenceoninvestmentandenergycosts,andwhichresultsinahigherdegreeofenvironmentalcompatibilityofthelightingsystem.Thefollowingreferencevaluesapplyforlightingsystemsforwhichtheconsultantcannotadequatelydeterminethepotentialinfluencefactorsconcerningareductionoftheilluminance:

Cleanroom/propertyMaintenancefactor0.8Normalroom/propertyMaintenancefactor0.67Verydirtyroom/propertyMaintenancefactor0.5Amaintenancefactorof0.5meansthatanilluminationtwicethatofEN124641mustbeestablishedasanewvaluefortheusageoftherecommendedillumination.Note:WhencreatinglightingsystemswithLEDlamps,theplannershoulddeterminethemostpreciseruntimeofthelampspossibleandtaketheplannedusefullifeofthesystemintoaccount;inthiswayarealvalueforthelamplumenfactorcanbedefined,whichcanbesignificantlyhigherthanthevalueof0.7,which,withreferencetotheusefullifeof50,000h,wouldotherwisebeused.