You have less than one month to try the cloud based Daylighting Analysis before it expires on 30 April.
More info is at:
http://autodesk.typepad.com/bpa/2014/03/another-update-of-light-analysis-for-revit-is-available-in-labs.html
Heads-up:
https://twitter.com/BIM4ScottC/status/449620076455800832
