Road Lighting Quality, Energy Efficiency, and Mesopic Design - LED Street Lighting Case Study

Anne-Mari Ylinen*, Leena Tähkämö, Marjukka Puolakka, Liisa Halonen

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

27 Citations (Scopus)


The topics of this paper are mesopic dimensioning, glare properties and energy efficiency of LED street lighting. Road lighting luminance measurements and threshold increment (TI) measurements are made for four different LED street lighting installations. The effect of mesopic dimensioning on energy consumption and life cycle costs of the LED installations are examined. Through the calculations and measurements, the energy efficiency and glare properties of the LED installations are analyzed. The measurement results indicate that the measured and calculated threshold increment values differ from each other due to varying calculation parameters in real installations. It also shows that energy can be saved when mesopic dimensioning is applied to street lighting design.

Original languageEnglish
Pages (from-to)9-24
Number of pages16
Issue number1
Publication statusPublished - Jul 2011
MoE publication typeA1 Journal article-refereed


  • street lighting
  • threshold increment
  • mesopic dimensioning
  • street lighting cost analysis

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