The BSL light sets have an excessive amount of lights for modern Poser versions. If you use them with Gamma Correction on, scene will appear dark

In scenes with only 2-3 lights GC usually gives a washed out appearance when light intensity is too high with un-corrected shaders.

Personally, I would try to learn some of the modern lighting techniques to take advantage of Poser Pro 2010 (which I see that you have).