Just a little later floodights were installed with an illuminance rating of 1, 825 lux, one of the highest-rated floodlights in Germany.
42.
Specifications for video cameras such as camcorders and surveillance cameras often include a minimum illuminance level in lux at which the camera will record a satisfactory image.
43.
The working distance is defined as the distance at which the maximum light falling on a surface ( illuminance ) would fall to 0.25 lux.
44.
Alternatively, it can be defined as the illuminance on a one-square foot surface of which there is a uniformly distributed flux of one lumen.
45.
Six years later the most specific elements of the stadium were built-four 56-meters height masts with floodlights whose total illuminance was 1890 lux.
46.
In a realistic application situation with 100 lx illuminance the contrast ratio goes down to ~ 350, with 300 lx it is reduced to ~ 120.
47.
This is the reason why most contrast ratios used for advertising purposes are measured under dark-room conditions ( illuminance E DR d " 1 lx ).
48.
CIE chromaticity coordinates and luminosity can then be calculated, providing a complete description of the source s color, including chromaticity, spectral power, illuminance, and luminance.
49.
A special kind of " ambient contrast " is the contrast under outdoor illumination conditions when the illuminance can be very intense ( up to 100.000 lx ).
50.
In the latter case, a checkerboard pattern with full-white and full-black rectangles is projected and the illuminance is measured at the center of the rectangles.
