1. Collaborative Articles
2. Stage Lighting Controls, Manufacturers of

Past and Present US manufacturers:
Alcorn-McBride,
Ariel Davis,
Barco (US/BEL),
Berkey-Colortran,
Baxter Controls, Inc.,
Capitol,
Century,
Century-Strand,
Colortran,
Cutler Davis,
Decor,
Dilor,
Doug Fleenor Design,
Dove Systems,
Eastern Stage Lighting,
Elation,
Electro Controls,
Electronic Designers Inc.,
Electronic Theatre Controls,
Electronics Diversified,
Entertainment Technology, Inc.,
ETA,
Federal Pacific,
Flying Pig Systems,
Frank Adams,
Gallagher Dimming & Stage Lighting,
General Electric,
High End Systems,
Hub,
Ithaca Theatre Lighting,
Kliegl Brothers,
LEE Colortran,
Lehigh,
Leprecon,
Leviton,
Lighting & Electronics,
Lighting & Sound Design,
Lighting Corporation of America,
Lighting Equipment Corporation (LECO),
Lighting Methods Inc.,
Lightronics,
Luxtrol,
Major Equipment Company,
Mega,
Metropolitan Electric,
Morpheus,
Newth,
Nova Systems, Inc.,
NSI,
Procon,
Production Resource Group,
Rainbow,
Rual Industries,
SCR Digitrol,
Siltron,
Skirpan,
StageBrite,
Strand-Century,
Strand Lighting
Sunn Systems, Inc.,
Superior Electric,
Teatronics,
Theatre Techniques Inc.,
Trixx,
Trumbull,
Van Buren,
Vari-lite,
Vickers,
Ward Leonard,
West-star,
Westinghouse.

Non-US manufacturers:
ADB (BEL)
AVAB (SWE)
Avolites (UK)
Barco (BEL)
Bytecraft (AUS)
Celco (UK)
ChamSys (UK)
Compulite (Israel)
Electrosonics (UK)
Enttec (AUS)
Flying Pig Systems (UK)
Jands (AUS)
LSC (AUS)
MA Lighting (GER)
Martin (DK)
R&D International / Martin (BEL)
Rank (UK)
Siemens (GER)
Strand Electric (UK)
Theatrelight (NZ)
Thorn (UK)
Zero88 (UK)

See also the thread: http://www.controlbooth.com/forums/lighting/4162-lighting-manufacturer-history.html.