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CIE standard overcast sky
Zenith
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horizon
CIE standard overcast sky pattern
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aylight factor
Daylight factor
Figure 2: Definition of the daylight factor and the CIE standard overcast sky
www.cibsejournal.com
June 2011
OUT OF
THE BOX
HOUSING SPECIAL
Innovations in new
builds and retrofits
LIGHTING GUIDE
Lessons for school
environments
ELECTRICAL SERVICES
Benefits of taking a
whole-life approach
IS IT TIME TO THINK
ABOUT A FLAT-PACKED
FUTURE FOR BUILDING?
CIBSEjun11 pp01 cover.indd 1
19/5/11 16:56:29
Figure 3: Prefabricated school building with classrooms designed to BREEAM daylight factor specification [from CIBSE Journal, June 2011]