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R-3 “Energetska učinkovitost v notranji razsvetljavi – Romunski primer” The installed lighting power has an average value of 0.835 kW/household. From the analysis of the data presented above we may conclude that the CFL energy saving lamps are bought by people with high earnings, which own houses. We consider the equipping degree with CFLs of approximately two units per household is high, and this denotes the interest of Romanian consumers for buying energy saving lamps. 8 REFERENCES [1] Alexandru Adriana, coordinator. CREFEN – Informatic integrated system for energy efficiency and saving in residential sector – CEEX programme, Contract C608/2005, 2005-2008. [2] Atanasiu B., Bertoldi P. Report on Electricity End Use Consumption in New MS and CC in Tertiary and Residential Sectors, July 2005, JRC - Ispra. [3] Berrutto V., Bertoldi P. European Commission energy-efficient lighting initiatives. Proceedings of the 25th Session of the CIE (San Diego, USA, 25 June - 2 July 2003). ISBN 3901-90621-5. [4] Beu D., coordinator. Study concerning the energy efficiency of the residential electric appliances – SEEC – Universitatea Tehnica Cluj-Napoca (RO), grant Gr 6113/2000 [5] Beu, D. Lighting systems in obstructed spaces. Ph.D. Thesis, Technical University of Cluj-Napoca, 2000 [6] Beu, D., Pop F., Residential and Commercial Survey for a Romanian Energy Efficient Lighting Program, ENEF 2002, Banska Bystrica, 2002 [7] Environmental Change Unit. Domestic Efficient Lighting (DELight), University of Oxford (UK), 1998. ISBN 1-874370-20-6. [8] European Commission. Commission Directive 98/11/EC of 27 January 1998 implementing Council Directive 92/75/EEC with regard to energy labelling of household lamps, Official Journal L71, 10.03.1998, pp. 01-08. [9] Leslie RP, Conway Kathryn M., 2000, The Lighting Pattern Book for Homes, Lighting Research Center, Reansealer Polytechnic Institute [10] Lewis J.O., coordinator. EnerBuild RTD Network - FP5 programme, 2001-2003. [11] Pop F. Energy efficiency in lighting between regulations and reality, Proceedings of Workshops Budapest, Prague, Warsaw, Newly Associated States EnerBuild RTD, 2003, ISBN 80-239-0742-5, pp. 38-42 [12] Pop F., Beu D., Ciugudeanu C. Promoting actions for lighting energy efficiency and saving in residential buildings in Romania, International Conference on Energy Efficiency in Domestic Appliances and Lighting – EEDAL’06, London, June 2006 [13] Zissis G., co-ordinator. European Efficient Residential Lighting Initiative - EnERLIn, EIE “Intelligent Energy – Europe” programme Grant EIE/05/176/SI2.419666, 2006-2008. [14] Zissis G, Progress accomplished in the frame of EnERLIn project during the first 6-month operation, Ingineria Iluminatului, vol. 8, No. 17 - Summer, 2006 [15] Statistic data 2003. Romanian Statistic National Institute. [16] U.S. Department of Energy, EERE Consumer's Guide Compact Fluorescent Lamps, Energy Efficiency and Renewable Energy 9 Naslov avtorja / Authors’ address: Dr. Florin Pop, professor Dr. Dorin Beu, reader Lighting Engineering Center, Technical University of Cluj-Napoca RO 400020 Cluj-Napoca, 15 C. Daicoviciu Street Romania Tel.: +40745. 516276 (Pop); +40723. 661536 (Beu) Fax: +40264. 592055 Email: florin.pop@insta.utcluj.ro dorin_beu@cluj.astral.ro stran 26 Posvetovanje “Razsvetljava 2006”
“Colour rendering index of LED light sources” R-4 Schanda J. and Madár G. COLOUR RENDERING INDEX OF LED LIGHT SOURCES Abstract LEDs are widely used in signalling applications and in large surface displays. In recent times white light emitting LEDs start to become used in general lighting as well. The spectral power distribution of white LEDs differs considerably from the power distribution of traditional light sources, thus it is not to wonder that the colour rendering index developed for classical fluorescent lamps does not works properly for LEDs. In our Laboratory we have investigated the colour rendering of traditional light sources and of LEDs of different construction (blue chip plus yellow phosphor and Red-, Green-, Blue-LED combination), both determining the colorimetric characteristics and evaluating their visual colour rendering properties. We could determine the differences between the mathematical method and the visual one. We have developed a number of new methods to investigate the colour rendering characteristics of LEDs, among others based on colour harmony and a preference type of study, also using simulation techniques. This paper will show the methods we used, together with some examples how light sources with different spectral power distribution influence the visual appearance of an environment, and how this could be described. Keywords: colour, colour rendering, LEDs. Povzetek Indeks barvnega videza svetil s svetlečimi diodami; Svetleče diode (LED) so široko uporabljajo v signalnih napravah ter v velikih svetlobnih panojih. V zadnjem času pa se bele svetleče diode vse bolj uporabljajo tudi v splošni razsvetljavi. Spektralna sestava svetlobe bele svetleče diode precej odstopa od spektralne sestave svetlobe tradicionalnih svetlobnih virov. Zato ni čudno, če se postopek določevanja indeksa barvnega videza, ki je bil razvit za klasične fluorescenčne sijalke, pri svetlečih diodah ne obnese najbolje. V našem laboratoriju smo raziskali reprodukcijo barve pri tradicionalnih svetlobnih virih ter pri belih svetlečih diodah različnih tipov (modra LED z oranžnim fosforescenčnim premazom ter kombinacija modre, zelene in rdeče LED). Določili smo kolorimetrične lastnosti in ovrednotili njihovo vidno reprodukcijo barv ter prišli do ugotovitve, da obstaja razlika med matematično in optično metodo. Na podlagi tega smo razvili več novih metod za proučevanje barvne reprodukcije pri svetlečih diodah, med drugim temelječe tudi na barvni harmoniji in simulacijah. Članek prikazuje metode, ki smo jih uporabili, skupaj z primeri, kako svetlobni viri z različnimi spektralnimi vsebinami svetlobe vplivajo na vidno zaznavanje okolice in kako je ta vpliv možno opisati. Ključne besede: barva (svetlobe), barvna reprodukcija, indeks barvnega videza, svetleče diode “Lighting engineering 2006” stran 27
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