football field lighting

This is for television-broadcast lighting standards and table 4 is for lighting standards without television coverage. Compared with the old standard (see table 5), the change is huge, mainly in the following aspects: 

(1) The average vertical illumination in the direction of the fixed camera is greatly increased, for example, the vertical football field lights average of the fixed camera direction with a V-class is increased from 1400lux to 2400lux; The horizontal illumination on the site reference plane was increased from 1500lux~3000lux to 3500lux.

(2) Color temperature and color-rendering index of two indicators do not rise and fall. For the highest level, that is, the international competition with television broadcasts, the color temperature is greater than 4000K, and the original standard requirements of 5500K or more; color index originally required “Better than 90” reduced to “no less than 65” can be. The experiment shows that the color-rendering index satisfies the requirement of table 3 and meets the requirements of table 5, the effect of TV relay is not changed obviously, and the light source with Gao Shewen and high color rendering is less effective. 

Table 6 shows that the two 2000W short arc two-end metal halide lamps are only different color indices, 80 and 90 respectively, but their light effect is 10%. Therefore, the FIFA move is very good, without affecting the television broadcast effect of the premise of the use of energy-saving options, but also the application of high-power football stadium lights have a greater choice of scope.

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