illumination level

illumination level

The quantity of light that illuminates a surface; measured in foot candles or in lux.
References in periodicals archive ?
Oltion deals with lots of simple examples of retinal illumination, but he forgets to mention that a telescope's concentration of the illumination level at the exit pupil can lead to "frying" problems at the eye's cornea, not the retina.
Also, he said the district streetlights illumination level was currently at 80 per cent as opposed to the set target of 90 per cent.
In smart lighting systems, the illumination level of the indoor environment can be determined by means of light sensors [32].
The illumination level is only briefly increased for the exposure of the original document and then immediately reduced to the brightness setting.
Installed in the facility's entryways, parking areas and stairwells, the new lighting also improves illumination level with brighter white-spectrum lighting to provide greater safety and increases aesthetic look.
Table 1: Natural Illumination Level and daylighting factor East Room 6 Days (10:30am-3:30pm) WWR Li (lux) Lo (klux) min max ave min max Ave 50% (10-15 Mar) 586.67 2104.33 952.37 28.587 52.359 42.108 25% (16-21 Mar) 276.33 965.33 515.39 13.699 41.714 29.112 Difference WWR DF (%) min max ave 50% (10-15 Mar) 1.25 5.26 2.2 8 25% (16-21 Mar) 0.63 2.41 1.2 3 Difference 0.62 2.85 1.0 5 West room 6 Days (10:30am-3:30pm) WWR Li (lux) Lo (klux) min max ave min max Ave 50% (10-15 Mar) 508.17 742.17 612.72 28.587 52.359 42.108 25% (16-21 Mar) 106.17 353.83 224.85 13.699 41.714 29.112 Difference WWR DF (%) min max ave 50% (10-15 Mar) 1.27 4.24 2.26 25% (16-21 Mar) 0.28 1.62 0.82 Difference 0.99 2.62 1.44
* Quality of light--Light from individual diodes inside an LED unit can aimed, through lens design, very accurately to achieve specific results in terms of illumination level and reduction of spillover or glare.
The additional power can cause a higher illumination level that 'may cause glare to oncoming vehicles' and increase the risk of a crash.
According to international standards, the lower limit of illumination level is 200 lux for classes (18, 19).
On the other hand, if the blind is closed and the daylight is blocked, the cooling load will be reduced due to the decrease in solar radiation, but the illumination level in the perimeter will decrease.
in perimeter zone [T.sub.P] = temperature increase [I.sub.Light] = demand illumination level [I.sub.constant] = setting illumination level [I.sub.P] = illumination increase Subscripts