When importing the other type of files, such as the Useful Daylight index files, the values are quite different, which would make sense if using typical illuminance values (not daylight factors). When Ecotect calculates Daylight Autonomy (under the calculate menu > Advanced Daylighting), it requires and uses Daylight Factor values.ģ. If the daylight autonomy uses the daylight factor values, then it makes sense again. I am not sure if the calculation uses the daylight factor or the illuminance values. When importing back the Dayligh Autonomy.DA files, there are also almost no difference. You may expect a difference since the orientation of the model is different, however, this makes sense to me since Daylight Factor is typically calculated under Overcast Sky conditions, whereas the orientation of the model should not have any consequences, since there are no sun in the sky.Ģ. When importing back the Daylight Factor.DA files, there are almost no differences between the results. You can open these files in a text editor to look at the changes between the two files.Īfter DAYSIM calculations are done, I have re-imported various *.DA files into Ecotect.ġ. I ran the DAYSIM calculation, and indeed, the model with the offset North creates a second *.pts file named *., which DAYSIM uses for calculations. using an analysis grid on two identical models, but different North orientations.

Daylight factor ecotect