Topic Title

That is one of the J.B. CAD macros available

Go the the "Support"/"Downloads" section of DataCAD's site for all of the available free macros.
https://www.datacad.com/download/frame.htm

Thanks for the replies. I recently noticed the LgtCalc macro and, at a glance, it seems very similar to some of those other programs. Unfortunately, I've been too busy lately to finish looking at them very closely. Between training a new draftsman, answering questions for other draftsmen, and trying to keep on top of my projects, I haven't been able to finish looking into these lighting programs.

Hopefully, I'll be able to finish soon, and I'll post what I find.