Sky Conditions for Daylighting
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2. Sky Conditions for Daylighting

For daylighting purposes, sky conditions are classified as either overcast, clear, or partly cloudy. Each classification has characteristics that influence daylighting design.


(a) Overcast sky (See Figure 2)

Figure 2 Overcast Sky


(b) Clear sky (See Figure 3)

Figure 3 Clear Sky


(c) Partly cloudy sky (See Figure 4)

Figure 4 Partly Cloudy Sky