Opinion: Climate-based daylighting metrics in LEEDv4 – A fragile progress

  title={Opinion: Climate-based daylighting metrics in LEEDv4 – A fragile progress},
  author={Christoph F. Reinhart},
  journal={Lighting Research \& Technology},
  pages={388 - 388}
  • C. Reinhart
  • Published 1 June 2015
  • Engineering
  • Lighting Research & Technology
The latest version of the Leadership in Energy and Environmental Design accreditation system (LEED v4) introduces the use of a climate-based daylighting metric, spatial daylight autonomy, as a simulation-based compliance path for the daylighting credit. The new LEED criterion is largely based on the IESNA’s recommendation that a point be considered to ‘be daylit’ if the illuminances due to daylight remain above 300 lx for at least half of all occupied hours in the year. LEED v4 further requires… 


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