Vectorworks is a powerful drafting program that is comprised of several industry pack. The industry pack most useful for theatre is spotlight. Spotlight has built in libraries for most manufactures that include wattage, beam spread, weight and color frame size. Base website http://www.nemetschek.net/ Spotlight http://www.nemetschek.net/spotlight/index.php Student website (a full-featured "Educational Version" is free to qualifying students, see site for details) http://www.nemetschek.net/student/index.php A great site to learn from http://instruct1.cit.cornell.edu/courses/thetr263/ Of course, we must discuss Software History also. With the introduction of the Macintosh in 1984 came MacDraft, I think by Claris. About 1993, Blueprint (Diehl GraphSoft, Inc.) begat MiniCAD (1996?), which begat Vectorworks, when founder Richard Diehl sold to Nemetschek. 1983, John McKernon's ALD begat ALDpro, which eventually became LightWright4.