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The Photometric Test Distance in Luminance Measurement of Light-Emitting Diodes in Road Lighting

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  • Dariusz Czyżewski

    (Lighting Technology Division, Electrical Power Engineering Institute, Faculty of Electrical Engineering, Warsaw University of Technology, Koszykowa 75, 00-661 Warszawa, Poland)

Abstract

Over the last few years, light-emitting diodes have completely dominated the lighting field. In road lighting, high-power LEDs have replaced traditional light sources. That is why various technical aspects of LEDs have been researched extensively worldwide. However, little research has been conducted in the area of luminance measurement. This paper reviews the methods for measuring the luminance of high-power LEDs. Particular attention is paid to the influence of the measurement distance on the measurement results. Next, the results of the tests using a modern image luminance measuring device (ILMD) for luminance measurements are presented. It is concluded that it is necessary to redefine the photometric test distance. The conducted research demonstrates that an incorrectly selected test distance can lead to the huge errors of several hundred per cent or more. In addition, the possible impact of the incorrect measurements on the design of road lighting installations is presented. It is shown that a road lighting installation can use over 300% more electrical energy compared to the installation based on the correct luminance measurements of single LEDs. In the final stage of the research, the definition of the photometric test distance for LED measurements using ILMD is proposed. The results of the research can also be useful for the luminance measurements of other types of LEDs.

Suggested Citation

  • Dariusz Czyżewski, 2023. "The Photometric Test Distance in Luminance Measurement of Light-Emitting Diodes in Road Lighting," Energies, MDPI, vol. 16(3), pages 1-20, January.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:3:p:1199-:d:1043549
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    References listed on IDEAS

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    1. Alexandru Viorel Rusu & Catalin Daniel Galatanu & Gheorghe Livint & Dorin Dumitru Lucache, 2021. "Measuring Average Luminance for Road Lighting from Outside the Carriageway with Imaging Sensor," Sustainability, MDPI, vol. 13(16), pages 1-30, August.
    2. Antoni Różowicz & Henryk Wachta & Krzysztof Baran & Marcin Leśko & Sebastian Różowicz, 2022. "Arrangement of LEDs and Their Impact on Thermal Operating Conditions in High-Power Luminaires," Energies, MDPI, vol. 15(21), pages 1-17, November.
    3. Malgorzata Zalesinska & Krzysztof Wandachowicz, 2021. "On the Quality of Street Lighting in Pedestrian Crossings," Energies, MDPI, vol. 14(21), pages 1-23, November.
    4. Krzysztof Skarżyński & Wojciech Żagan & Kamil Krajewski, 2021. "LED Luminaires: Many Chips—Many Photometric and Lighting Simulation Issues to Solve," Energies, MDPI, vol. 14(15), pages 1-17, July.
    5. Irena Fryc & Dariusz Czyżewski & Jiajie Fan & Catalin D. Gălăţanu, 2021. "The Drive towards Optimization of Road Lighting Energy Consumption Based on Mesopic Vision—A Suburban Street Case Study," Energies, MDPI, vol. 14(4), pages 1-23, February.
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