How do I properly set up indoor lights in Iray?

And yes I know there is a video on Iray on youtube that gives some info. But my renders aren't turning out so great.
This render here has 4 photometric lights . Render time 1 hr and 15 min . No dome . Model is inside a cube .
Don't know how to make mesh lights. Some info on that would be much appreciate as well.


Test_shot.png
1311 x 1048 - 2M
Comments
Try this:
http://sickleyield.deviantart.com/journal/Tutorial-Getting-Started-With-Iray-519725115
If you look in Commons and DAZ Studio Discussion, you'll find several thread on Iray where people have been sharing information about lights, settings, skin, etc.