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Learn what 0.6 to 1.6 projector screen gain means, how gain is measured, and how ALR, projector type, room lighting, viewing angle, and screen size affect your choice.

CLR stands for Ceiling Light Rejecting, while UST ALR stands for Ultra Short Throw Ambient Light Rejecting. Although the two names emphasize different features, they essentially describe the same type of ambient-light-rejecting screen material designed for ultra-short-throw projectors.