[Radiance-general] sunny sky and clear sky conditions

[Nicolas Roy]

The dilemma is - The same illuminance distribution that's well above the 
design fc level under sunny sky conditions is well below that threshold 
under standard clear sky. I just double check to make sure it's meeting 
the LEED criteria of 75% of space meeting 25 fc at noon on June 21 under 
clear sky conditions and it almost never does (I use the standard clear 
sky in IES Radiance for that).

-The CIE clear sky is a sky model which has no direct sun input (clear sky 
in Radiance, without sun). Does your LEED criteria refer to real life 
clear sky condition, or the CIE model? Real life clear sky would 
correspond to a sunny sky description.

Kind regards,
______________________________
Nicolas Roy
VELUX A/S
Strategic Marketing
Daylight Energy and Indoor Climate
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