There is only one file type that uses the .LW4 extension:
Lightwright File

- Developer John McKernon Software
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Popularity
- Category Data Files
- Format N/A
Document created with Lightwright, a software program for managing theatrical lighting paperwork; saved in a format that is a cross between a spreadsheet and a database; can store 30,000 lights, 32,000 dimmers, 62 DMX universes, and up to six different control systems.
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Updated: February 21, 2009