Projector for Lighted Room Environment

Some may wonder why do we want to have a projector for the lighted room while in the cinema it is all dark. In the cinema there are some lights under the seats and lights at the exit sign, they are to help our eyes feel comfortable, just like having cozy ambient light when we reading a bedtime story.  These projectors here work well both in lighted and ambient light rooms. The lighted room is needed during the presentation so we still can read or take notes. *Note: strictly not against any spotlights or many down lights at one time*