All lighting design is for the sake of visual service - — Brightness - Lighting network

Guide language: the popular point, brightness is 'eye look how bright' intuitive feelings. Such as the small candle in the night, even if the flame is very weak but still looks very bright.

today this article small make up what is brightness. Popular point, brightness is 'eye look how bright' intuitive feelings. Such as the small candle in the night, even if the flame is very weak but still looks very bright. Brightness is defined, then, is there a physical quantities can be accurate to judge the human eye to the light intensity of real feelings? This quantity is actually exist, it is called '' brightness'. The brightness is what people call 'light environment brightness within a space'. Its definition is a little round mouth: refers to the light source in a given direction on unit area of the luminous flux emitted within the solid Angle, unit for CD / ㎡. In fact the most simple and intuitive understanding is: you can see how bright objects. Everyone should have this experience: brightness is the easiest to cognitive visual senses a thing. If you see an object, it looks very bright that is high brightness; If looks dark it's lower brightness. So, although the definition of brightness look very difficult, but it actually is the most easy to understand. Brightness distribution reference we often say 'all lighting design is for the sake of visual service'. But people in the different brightness is under the direction or Angle of view of the different; Even if the same lighting conditions, the brightness of the different objects also vary. In such a case, therefore, need a brightness reference value. The brightness distribution reference is available for your reference, Using the object) to the general population 。 一个。 The human eye can perceive the lowest brightness is 0. 1 cd /㎡b。 Road brightness is usually 1 CD / ㎡ c. Identify the brightness of the facial features of 2 - 20 cd /㎡d。 Walls and ceiling of the optimum brightness for 50 - 200 cd/㎡e. Optimizing the brightness to 100 - 1000 cd /㎡f。 General lighting to allow the brightness of the value of 1000 - 10000 cd /㎡g。 160000 CD / ㎡ brightness can make a person feel dazzling, not work properly if it is, the overall brightness of the room is up to the young man's 2 - 3 times; Reading and neuropsychology, teenagers at his desk doing his homework, play electronic products for a long time, face high brightness or deficiencies are easy to cause eye fatigue. So, be sure to teenage book desktop or the brightness of the learning environment is appropriate. Desk writing homework play electronic products brightness control and contrast when an environment is very dark, see not clear; With brightness growth and achieve a certain value, the human eye can see not clear. Brightness from left to right in turn increase because the environmental brightness if is beyond the scope of the eyes to adapt, the sensitivity of the eye will decline. So the brightness of the light environment should choose a suitable range, don't too high or too low. Watch the content and background brightness contrast second, watch will there is a certain brightness difference between object and its background, and contrast effects. If the difference is more and more small, watch objects clear, also will be more and more low. Therefore, when be being designed indoors also should pay attention to the brightness of the contrast effect.

Jane a space performance