LED lighting is not just as simple as a light-emitting

From a design point of view to talk about design, about the lighting from the perspective of the building, which may be a lot of teachers selected angle.
If we want to talk about it more in depth? What angle will allow us sobering it?
led high bay light supplier country open up a creative writing teacher's curriculum, talk about lighting design from the perspective of his study of visual perception, the light of how the optic nerve is accepted, the final form of our emotions start tricky unique angle, like the only solution, but mysterious martial arts martial artists master.
"Strictly speaking, we are not designed illumination, but different spatial brightness of each facade."
We discuss the lighting program, the perceptions of the degree of comfort measure talked much, but just know these surfaces only, but to know why this door for visual perception study courses you must not miss.
Too many hidden secret knowledge, may make you suddenly see the light, and suddenly.
The last time we talked about the development of illumination standard values are based on the effectiveness of visual perception, so this time we take a look at, among those different illumination values, what kind of relationship would constitute, for lighting designs, including why design "ethics "exists?
Let's take a look at the dark-adapted and light adaptation of the relationship:
Light adaptation and dark adaptation
When a man in a bright environment for a long time suddenly into the dark, can not see anything initially, after a certain time, visual acuity gradually increased, gradually able to see objects in the dark, this phenomenon is called dark adaptation (dark adaptation).

Conversely, when people in the dark for a long time and suddenly into bright at first felt a bright light, you can not see the object, only wait a while to recover vision, this is called light adaptation (light adaptation).

        We can clearly see from the chart, from a long time out into the dark adaptation, from dark to light adaptation time is short (red box). These feelings we can find in our daily lives feeling experience.
Theoretical explanation, dark-adapted sensitivity of the human eye in the dark to light gradually improve the process. Generally in the first to enter the dark for about 7 minutes after, the human eye perceives light thresholds occur once significantly decreased, later appeared more pronounced fall again; about to enter the dark for 25-30 minutes, the threshold drops to the lowest point , and stabilized in this state.
According to analysis, the first stage of the main dark adaptation and cone cells of the relevant visual pigment synthesis; the main stage of the second stage i.e. dark adaptation, the rod cells rhodopsin synthesis enhancement.
Light adaptation process quickly, usually within a few seconds to complete. The mechanism is the rod cells accumulate in the dark a lot of rhodopsin into bright light at the rapid decomposition of the face, resulting in dazzling light perception. Only after a more rapid decomposition of the rod pigment, less sensitive to light cone in the light sensitive pigment can be restored vision.
Professional lighting plan "ethics" reflect
So the question is, so-called lighting plan "ethics", reflected in where? Reflected in the professional, for a typical example:
Please imagine, outdoor illumination usually reaches the range? Up to sunny 100,000lx, theater or cinema it? If you will not exceed 10lx only open security lighting, we assume outdoor is 10,000lx, the audience went 10lx indoor theater, which suffered during the eye-level differences in light intensity 1,000 times.
From the theoretical point of view, then dark adaptation, 1000: 1 difference in illumination level adaptation, ordinary people may experience 15 minutes or even longer.
So in this case, excellent lighting designer should do?
Excellent lighting designer should determine when the audience enters the theater interior from outside the routes, entrance, foyer, hallway, corridor, etc., should be lighting planning how different levels of illumination in different locations, with different illumination transition to help viewers gradually build visual comfort.

Some visual range, dark vision, intermediate vision and clear visual routine situations.
For the example above cinema / theater, we are talking about light and shade just a matter of comfort, but in some cases, is the security issues involved between light and dark, such as tunnel lighting:

Figure: when led high bay light price into the tunnel from the outside, dark visual effect makes entrance tunnel lighting should be brighter than the interruption, but also makes clear visual outlet sections should slightly darker than the entrance.
Therefore, understanding the meaning of different illumination values, it is more between light and dark to understand the impact of the human visual effect where it should be said that the lighting designer's professional ethics.