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Lumen Depreciation

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  • First Online:
Encyclopedia of Color Science and Technology

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Synonym

Light depreciation

Definition

Light losses during the use of a lighting installation, caused by the decrease of the luminous flux of lamps, the dirt accumulation on and loss of reflectivity and/or transparency of luminaires, and dirt accumulation on or discoloration of room surfaces (in interiors).

Lamp Lumen Depreciation

The light output of virtually all lamp types declines gradually during operation. The causes of light output depreciation are numerous. With incandescent lamps, it is mainly the blackening of the bulb – caused by evaporation of the filament. Discharge lamps also suffer from blackening, in this case, due to scattering of the electrode material, which settles on the wall of the discharge tube. With fluorescent lamps, high-pressure mercury lamps, and solid-state LED and OLED light sources with a fluorescent coating, the primary cause of light output depreciation is a gradual exhaustion of the fluorescent powder, which slowly loses its effectiveness.

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References

  1. IEC: IEC 62717 edition 1.1. LED modules for general lighting – performance requirements (2015)

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  2. IES: LM-80-08 Approved method: measuring lumen maintenance of LED light sources (2008)

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  3. IES: Errata #1 for LM-80-08 Approved method: measuring lumen maintenance of LED light sources (2015)

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  4. IES: TM-21-11 Projecting long term lumen maintenance of LED light sources (2011)

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  5. IES: Addendum B for TM-21-11 Projecting long term lumen maintenance of LED light sources (2015)

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Author information

Authors and Affiliations

  1. van Bommel Lighting Consultant, Nuenen, The Netherlands

    Wout van Bommel

Authors
  1. Wout van Bommel
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Corresponding author

Correspondence to Wout van Bommel .

Editor information

Editors and Affiliations

  1. Color Science & Imaging Lab, North Carolina State Univ, Raleigh, NC, USA

    Renzo Shamey

Section Editor information

  1. van Bommel Lighting Consultant, Nuenen, The Netherlands

    Wout van Bommel

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van Bommel, W. (2021). Lumen Depreciation. In: Shamey, R. (eds) Encyclopedia of Color Science and Technology. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-27851-8_136-3

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  • DOI: https://doi.org/10.1007/978-3-642-27851-8_136-3

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  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-642-27851-8

  • Online ISBN: 978-3-642-27851-8

  • eBook Packages: Springer Reference Physics and AstronomyReference Module Physical and Materials ScienceReference Module Chemistry, Materials and Physics

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Chapter history

  1. Latest

    Lumen Depreciation
    Published:
    16 June 2021

    DOI: https://doi.org/10.1007/978-3-642-27851-8_136-3

  2. Original

    Lumen Depreciation
    Published:
    30 September 2014

    DOI: https://doi.org/10.1007/978-3-642-27851-8_136-2

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