The rendertime was 20h. long but still less than in other unbiased render engine that I used before
You must understand that you need clean the whole render by each emitter, if you are planning to have all switched on maybe 4 should be enough, anyway I'll try a simply sky configuration.
The video: http://www.motivacg.com/temporal/thea/salonvideo.avi
can you tell us which type of pc have you used for your renders, please?
Single CPU Core2 Quad 3.0
Don't be afraid of the rendertime Thea (at least for me) is one of the fastest unbiased renders I've tried, anyway I'll try a more common illumination in the same scene
Edit: all the images and the video comes from a single render with relight so 20h is the time for the complete 'pack'