From 1.9 indoor to 3.9 Outdoor. The best definition and size for your event.
From 4000 ANSI Lumen with ultrashort lens for small - mediu size rooms with 3m wide screens till to 30k projectors with tele lens for big conference rooms and 6-8m wide screens.
Add light to your event to get a bigger impact in your audience. Some uplight will add colour, moving heads for more spectacle and front/back lights for camera captions.