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Color Light Output (CLO), also known as Color Brightness, is a specification that provides information on a projector’s ability to reproduce color. Color Light Output is specified in the lumen unit and measures a color projection system's ability to correctly reproduce color brightness.
Harrison adds that, whereas “indoor projectors may weigh more than six pounds [and] include features such as additional I/Os, higher brightness (3500 - 4500 lumens), larger zoom ratio and even ...
The ceiling projector or cloud searchlight is used to measure the height of the base of clouds (called the ceiling) above the ground. It is used in conjunction with an alidade, usually positioned 1000 ft (300 m) away and wherever possible set at the same level. The projector is normally set at 90°, although 71° 31' may be used, in relation to ...
To help compare different orders of magnitude, the following list describes various source in lux, which is a lumen per square metre. Factor Multiple Value
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A foot-lambert or footlambert (fL, sometimes fl or ft-L) is a unit of luminance in United States customary units and some other unit systems. A foot-lambert equals 1/π or 0.3183 candela per square foot, or 3.426 candela per square meter (the corresponding SI unit).