Lighting small knowledge | why some make people light eyes are very uncomfortable? - China lighting network

People see objects clearly, besides related to people's eyesight condition, also with the physical condition of the object and its physical environment. When the size of the object and illumination, contrast the bigger the see clearly. It was found that when the background brightness increased from 0 to 100 CD/m2, eyesight increased linearly, and again after more than 600 CD/m2 brightness is not high and the relative background brightness and high light source, then will feel the light is very bright. So, influence people visual discrimination is not only the brightness, brightness and contrast. Contrast is different from person to person, usually a man who has a good eyesight, the contrast sensitivity can reach 100, can cause to the tiny brightness contrast. But sometimes when a light source or the brightness of the object than in the field of vision, beyond the scope of the human eye can regulate people will feel uncomfortable. With the brightness of the luminous objects and number, Angle of view, the line of sight and the relative position of glitter and adaptation of the eye. Object just can be seen when the contrast is called critical contrast. Lighting professional will contrast and critical perspective with illumination ( Or brightness) Referred to as the relationship between visual effect, and commonly used to measure people see objects clearly. High visual effect suggests that the object is clear, the opposite is not clear. To improve the visual effect can be achieved by increasing intensity of illumination, contrast and perspectives. In the case of low illumination level, improve intensity of illumination can significantly improve the visual effect. But when illuminance level is higher, pure improve intensity of illumination is used to improve the visual effect is not obvious, blindly pursue high levels of illumination at the same time, also can cause the waste of energy. At this point, if improve contrast or perspective also can improve the visual effect, and can see things more clearly the details, and can achieve the goal of energy saving. YanZhiXiang

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