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Shenzhen Wu Chunhai: LED lamp color temperature is a key technology - Shenzhen, lamp Board, LED Lighting - Lighting Industry
Lighting environment from Shenzhen Management Center of Mr. Wu Chunhai on September 6-7, 2009 LED Illumination Technology and Development Forum published "LED lights of color temperature and the choice" brilliant speech, the following are the main contents of his speech.
LED lamps from the lighting point of view, the main bright efficiency, light, the light fades, color temperature (light color) and other four major problems. In recent years, LED street light technology with each passing day, the optical performance improved quickly. Organizations from our recent test LED lights results, 27 LED lights in the entire lighting effect has been more than 6 70Lm / W, up to 81.5Lm / W; with much higher light levels, uniformity compared to high pressure Sodium lamp Has advantages; light failure are obviously improved, compared favorably with other light sources.
In this context, the problem began to surface color temperature, LED lights up as one of the main contradictions, become the focus of recent concern to the industry. Indeed, the city lights the night "dimming division," the decision of its color temperature at night, "background", and is closely related to people's daily lives. Therefore, LED street lamp color temperature scale of the problem be solved before application, or may become a huge obstacle to the promotion. At present, this situation has occurred in some cities, it will come true in more cities.
Mr. Wu Chunhai by analyzing the color temperature of the physiological and psychological attributes, and its relationship with light (photo) degrees, the relationship between comfort, combined with LED lamp test, which suits the needs of the color temperature range of the current technical level.
Think one: LED lamp color temperature study should focus on physiological or psychological?
As a new light, LED street lighting is inevitable with the current mainstream, especially the repeated comparison of high-pressure sodium lamp, color temperature is one of the major differences. LED lights supporters believe that high color Wen Baiguang for road lighting are among the visual effects, visibility is good, feeling brighter than low color Wen Huangguang; high pressure sodium supporters believe that yellow is good through the fog, feeling warmer than White is more popular. Above argument has its own logic and reason, there is a certain rationality. However, only list the advantages and disadvantages of different color temperature are compared, and can not find the LED lights on the contradictions faced by color temperature, on solving the problem, not help promote the use of LED street lamp.
Therefore, Mr. Wu Chunhai raise the color temperature from a property perspective, the physiological and psychological. There is no doubt that the color temperature of two property both physical and psychological, some indicators even inseparable. For example, the effect of light through the fog of the driver the ability to identify and reaction speed, is physiological; the same time, through the fog capacity errand drivers feel hazy, the spirit of high tension, is psychological. However, from the research point of view, we need to be treated separately, the indicators, methods, content classification, to identify the scale of promotion of LED lamp color temperature in the most need to address the problem before.
Physiological research, including visibility, recognition by other indicators, scientists need well-designed experiments to obtain; psychological research, including comfort, satisfaction and other indicators, the need for a sufficient number of people to engage in investigation and situational questionnaire. Physiological research is based on professional judgments, the right to control their speech scientists hands, because LED lights can be used for road lighting is the industry consensus, we will not become an obstacle to the promotion scale. The psychological research is different, the result depends on the subjective feelings of the general public, because LED lights will change the city the night of both "background", public acceptability is very important. Therefore, the scale of the promotion before, psychological research more urgent than the physiological studies.
Currently, there are many white people of the city to refuse to accept low levels of high color temperature of LED lamps, LED lamps to light the industry in efficiency and color temperature selection dilemma should be the priority, or the color temperature of light efficiency priority.
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Episode 2 , DIY Photo Studio Product Lighting