AVS Forum Special Member
Join Date: Jun 2005
Location: Northern, VA - Washington, DC
Mentioned: 32 Post(s)
Tagged: 2 Thread(s)
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I'm not sure if you have any mounting restrictions or requirements you have to deal with. The screen itself is 70 square feet (or so). Using the numbers: 70 square feet, with a minimum requirement of 50 real lumens per square foot is 3,500 real world lumens from any projector under normal florescent lighting.
Dealing with manufacturer bias and lamp dimming, you want about 80 advertised lumens per square foot of screen space, or about 5,600 lumens, minimum from any projector you buy.
1024x768 is absolutely fine for your screen size and viewing distance.
Light levels in the room may be no higher than standard florescent lighting.
This will give you about a 10:1 contrast ratio. No, you did't read the wrong. Your GOAL is to get to about 10:1 contrast. Maybe 12:1.
Now, my opinion: Your budget is a joke.
You have a room that seats 300 and you are budgeting $5 per person for the projector. If this is a unfunded, free public venue, then that's what you may have to deal with. But, if anyone pays to enter those doors, or they are paid for their time seated in that room, then at $10/hr. that's $3,000 per HOUR they are in front of the projector. Over the life of the first lamp, call it 2,000 hours, at half capacity, that works out to $3,000,000 of people hours. $1,500 is a pretty meaningless number in that consideration.
If people are paid, or pay, to be in that space, and the projector matters, then budget should almost be irrelevant, and I would plan on spending whatever it takes and shoot for something closer to 7,000 to 8,000 lumens.
AV Integrated - Theater, whole house audio, and technology installation in the Washington DC metro area.