The classic calculation for screen brightness is:
Projector Lumens / Screen area (sq. feet) * screen gain =
Brightness (in foot-Lamberts, or fL).
Target brightness is 12-15 fL in a darkened room, maybe around 20-ish with a little ambient light. But here's the catch -- projector "ANSI Lumens" specifications are so hyped and inaccurate, that a good rule of thumb is to take the projector's ANSI lumen specification, and use ONE QUARTER of this advertised value in your calculation. No kidding, those numbers are really that unrealistic.
Grey screens with gains above 1.0 are made by Stewart (the aforementioned "Firehawk"), and Da-Lite ("High-Contrast Cinema Vision") - I'm sure there are others, too.
Oh and I would personally prefer watching movies with a good two-channel "music" system than a typical receiver-based surround system. But that's definately a preference thing, some people feel the opposite.
Projector Lumens / Screen area (sq. feet) * screen gain =
Brightness (in foot-Lamberts, or fL).
Target brightness is 12-15 fL in a darkened room, maybe around 20-ish with a little ambient light. But here's the catch -- projector "ANSI Lumens" specifications are so hyped and inaccurate, that a good rule of thumb is to take the projector's ANSI lumen specification, and use ONE QUARTER of this advertised value in your calculation. No kidding, those numbers are really that unrealistic.
Grey screens with gains above 1.0 are made by Stewart (the aforementioned "Firehawk"), and Da-Lite ("High-Contrast Cinema Vision") - I'm sure there are others, too.
Oh and I would personally prefer watching movies with a good two-channel "music" system than a typical receiver-based surround system. But that's definately a preference thing, some people feel the opposite.