I used ECOTECT to build a model, did daylight analysis under Overcast sky condition. Then I expported to Radiance to perform the daylight analysis with Clear sky condition under ECOTECT environment. After done daylight analysis by Radiance, I checked the daylight level result again. It looks like the result changed a little bit. This will be the result LEED Comliance request. My question is: is the new daylight level result from Radiance analysis under the Clear sky condition? Is my analysis procedure correct? How to show/approve it IS.

I hope someone can answer my question.

Thanks,