'Pupil lumen' real light quality measurement

How can see light in the psychological effects of scholars study the theme, is also discussed for many years. Describe the light as 'lumen output' and in the candle light to measure the working state of light is needed to complete the various characters are described and defined in the number of traditional methods. But, that is to say review is in the light of the visual effects and on the basis of the results of psychological impact. In addition, color rendering index and related to clarify the quality of the light color temperature ( Equivalent to compared with bright moonlight color, the color of the real embodiment of degree) 。 Light source technology development experience very many types and colors, simple use lumens measure one can see, is completely not enough. A good example is the low pressure sodium lamp can produce a lot of lumen, but only two colors, Yellow and grey) 。 Show the authenticity of the ability - In addition to the object shape - In this light has been lost. Different light sources have different spectral range. Fluorescent lamp has a wide range of output spectrum. Vision is influenced by many factors, from the light intensity, distribution, color, contrast, and reflection, flashing, air quality, and watching the movement of the object, and so on. Under the condition of low light and high light our eyes use different parts. Eyes including cone and rod type cell run in the opposite situations respectively. Cone cells recognition under the condition of light color and details ( Optimum light) Liable under the dim and stem cells ( The scotopia) 。 In the light, we miosis to feel more details, also increase the depth of field and feel light. Under the weak light, the pupil dilation in order to make more light to enter. To measure the 'real' the number of light meter and recommend work light levels are the traditional calibration with visual during the day. General internal light source based on the day the visual response. In spite of this, scholars have pointed out according to the visual and interior lighting, pupil size and influence of the relationship more closely than imagined. In come in the seminar, some presenter encourages designers in choosing to detailed said beacon of light and dark rate, so that we can provide users with better design, effect and good visual perception. Laboratory light sources system research results show that the light source to choose optimum rate of light and dark as importance reveals the application in the different light source light and dark in the lumen output depending on the rate of conversion coefficient, eyes feel on the vision of the effective lumen depends on the size of the pupil and affect the visual ( See table below) 。 Some light though lm/w such as low pressure sodium lamp is higher, but the number of calibration coefficient and the pupil is lower, the actual lost most of the light output quantity, however, like the high quality of nanometer six primary electrodeless lamp is fully obtained the very good effect. Electrodeless lamp rated output lumens less wattage, but can have very good vision. Energy saving effect is achieved. Lumen to the pupil lumens conversion coefficient of calibration coefficient for the lumens per watt pupil lumens per watt caused by traditional numerical values. It can measure the eyes to see the effectiveness of emit light. Pupils are more likely to accept the end of the spectrum are blue.