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August 1, 2006Projector Lumens GuideLumens are a measurement of light output commonly used to compare the brightness of data projectors. The American National Standards Institute have a commonly used standard for measuring light output referred to as ANSI lumens. The standard requires an average of several measurements to be taken across the face of the light source being measured. Factors affecting required brightness (lumens):
There are some rough guides to brightness (projector lumens) required for certain room types and ambient lighting conditions which make assumptions for the other factors involved. For a professional result the required brightness should be calculated professionally using the correct units. A general brightness guide is as follows:
The Projector People website has a lumens guide to help determine how bright a projector is needed for business, home theater and house of worship environments. An excellent brightness calculator is available from Digital Projection’s websiteIt allows one to experiment with different screen gains, sizes, aspect ratios, projector lumens and venue ambient light.
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