Quote - I do have a question about all of this.  When i look at log that is generated when loading the luxfile, I see it says that aconst - econst are not used.  I find that curious as to why, if it is documented to use those.

Well, I don't know, one would have to ask this over at the Lux forums.
As I said, I took the values from their test files, so it might be those values aren't used anymore. They are documented as being the settings for atmospherics (haze), that's all I can say...