There were multiple issues with user-defined sources in the Foxbat scene:
* The INT files for the Sodium and Mercury lamps needed to be rescaled
to produce the correct luminance values.
* The source materials were updated to use the normalized shape (constant
total power vs. shape) feature.
The updates to the Foxbat scene were checked into the "base" trunk and 4.5.1
See bug #623 for more information.