How to identify the quality of LED lights with tec

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Unlike the road tunnel lighting lighting, has its distinct specificity, its security concerns in the lighting system is particularly important. Lighting programs in the design of the tunnel, taking into account human factors in light adaptation and dark adaptation, attention to transitional space and transitional lighting design. Adaptability to meet the requirements of the eye, take the tunnel entrance in the shade for a period of transitional lighting in order to guarantee a certain visual requirements.
Exit the tunnel time is very short due to adjustment,[link widoczny dla zalogowanych], generally less than 1s,[link widoczny dla zalogowanych], it may be other treatments. Usually there are several special tunnel vision questions: (1) before entering the tunnel (daytime): As the great difference between the brightness of the tunnel and outside, so to see from outside the tunnel,[link widoczny dla zalogowanych], the tunnel entrance lighting is very good to see a "black hole "phenomenon. (2) into the tunnel (daytime): car from the outside into the bright and dark tunnel even if not later, to go through some time to see the situation inside the tunnel,[link widoczny dla zalogowanych], called "adaptation lag" phenomenon.
(3) the exit of the tunnel: in the day, cars pass through a long tunnel near the exit, due to the external light to see through the export of high export appears to be a "light holes", there will be a strong glare, the driver will not feel; night and day just the opposite tunnel exit hole saw is not light but the black hole, the driver will not see the outside to the road line and the road block.
Several more specific vision problems to make a higher tunnel lighting requirements, to effectively address these visual problems, through several ways. One. Tunnel tunnel lighting lighting set into the introduction section of the general, adaptation section, transition section, the basic section and five sections lighting outlet which has a different role in each section: (1) the introduction paragraph: the elimination of "black hole" phenomenon, so the driver can identify the obstacles in the exit of the hole; in the day, for example, assume that the tunnel mouth environment brightness 4000cd/M2, speed of 80KM / H,