We are trying to evaluate the best way of meeting this requirement through Option 1 - Simulation according to the latest (May 2011) Addenda changes (min. 10 fc on Sept. 21 at 9 am and 3 pm under clear sky conditions).

We have the project modeled in Sketchup.

My initial thought was to export from Sketchup into Daysim, but I understand there will be a problem with the sensor file and we'll need to create a text file (?). We have Ecotect and can import the .3ds file from the Sketchup Model and then export into Daysim.

I've also learned that Radiance will do the same analysis as Daysim.

Thoughts? What are other design teams using to meet this credit? Thanks in advance.