In this video we see how we can adjust the light brightness and other parameters while rendering. The technique shown here allows you to select each individual light in Lux and change each parameter on the fly.
We also see how to easily adjust the image exposure manually.
Here is quick preview of Reality 3 for Poser. At this date, August 7th 2012, Reality is not finished but we have a lot done already and the UI is almost completely defined. The program runs very solidly and it does most of the material conversions.
Hope you'll enjoy this short technology preview.
More information about the product, including specs and release date, is available at: http://preta3d.com/technology-preview-reality-3-for-poser/