Light quality and efficiency of consumer grade solid state lighting products

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    The rapid development in flux and efficiency of Light Emitting Diodes (LED) has resulted in a flooding of the lighting market with Solid State Lighting (SSL) products. Many traditional light sources can advantageously be replaced by SSL products. There are, however, large variations in the quality of these products, and some are not better than the ones they are supposed to replace. A lack of quality demands and standards makes it difficult for consumers to get an overview of the SSL products.
    Here the results of a two year study investigating SSL products on the Danish market are presented. Focus has been on SSL products for replacement of incandescent lamps and halogen spotlights. The warm white light and good color rendering properties of these traditional light sources are a must for lighting in Denmark and the Nordic countries. 266 SSL replacement lamps have been tested for efficiency and light quality with respect to correlated color temperature and color rendering properties.
    This shows a trade-off between high color rendering warm white light and energy efficiency. The lumen and color maintenance over time has been investigated and results for products running over 11000 h will be presented. A new internet based SSL product selection tool will be shown. Here the products can be compared on efficiency, light quality parameters, thus providing a better basis for the selection of SSL products for consumers.
    Original languageEnglish
    JournalProceedings of SPIE - The International Society for Optical Engineering
    Pages (from-to)864119
    Number of pages9
    Publication statusPublished - 2013
    EventSPIE Photonics West : Green Photonics - The Moscone Center, San Francisco, CA, United States
    Duration: 2 Feb 20137 Feb 2013


    ConferenceSPIE Photonics West : Green Photonics
    LocationThe Moscone Center
    Country/TerritoryUnited States
    CitySan Francisco, CA
    Internet address

    Bibliographical note

    Paper 8641-44.


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