I can't believe you've not have loads of replies about your new rendering plugin, it is incredible!! Maybe most people haven't noticed it yet?
I don't think the 2500 hits on the blog article about the plug-in were made only by lost Internet users and search engine crawlers. 
I think possibly half of those are from me finding the plugin so amazing that I kept going back and re-reading parts of the blog
Keep in mind that all the lights generated during the rendering are still unable to go through transparent panes because of limitations in SunFlow. Nevertheless, Sun light and exterior lights are able to light the interior of a house through window panes with this plug-in, because it doesn't render them.
This is one area I would like to ask you about, because I think I have misunderstood what you have written. To see what would happen to the lights I tried a very quick test, here are the results.
Exciting results!
I used walls to build a box shape, added a room, then an extra wall across the middle, placed some windows and a door then some props and four lights on the other side of the room so the only way light could enter was through the door and windows.
PS: Left the time set after midnight to make sure no other lighting could influence the test (important because even with the 'Add sun light' button disabled the Sunlight is still rendered but with less intense shadows, I guess with the button disabled it is simulating external ambient daylight light and enabled is like strong Sunlight on a bright clear day?) Oh and I also made sure the only rendering tick box is the 'Turn on lamp lights'
In case you would like to see how I positioned the lighting I've added a download link for the model.
>>> Here <<<
Further ideas:
I was thinking rather than you having to develop lots of different lights would it be easier to create a plugin for users to design their own style lighting, so they can choose intensity, radius and also importantly the colour of the lights (at the moment there is only the white lights you kindly made or the yellow light from the supplied candles)
Thank you for your time.
Hope your week is going well.
db4tech
