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More Great Information on Street Lamp:
LED street lamp the technical key points of analysis
"Ten city million in high-tech industries is light" to promote the development of application demonstration project and its purpose aims to choose a batch of good foundation of city, state, local, and take joint model, enterprise spearheaded LED municipal lighting applications for our pilot, comprehensive promotion groping experience, and semiconductor lighting by using promoting industrial level of independent innovation, enhance the international competitiveness, promoting China's semiconductor lighting industry bigger and stronger.
This article chooses the demonstration projects more street lamp, tunnel lights and greater influence on the drive power products analyzing three aspects its technical progress, "ten city million for the smooth implementation of the light" to provide the reference.
At present, the traditional source for road lighting is mainly high-pressure sodium lamp, LED lamps mainly in some teams on the main applications, but both already pilot show obvious quality differences. In photosynthetic efficiency, high pressure sodium topped 140 lm/W, than current commercial high power LED efficiency 100 lm/W is high, but the color developing index (LED about 80) than high pressure sodium (about 25), and, in the same luminance white LED more help drivers or pedestrians identifying target, its road lighting effect and comfort to far above the high-pressure sodium lamp. Efficiency in lamps and lanterns, high-pressure sodium lamp using spherical shine design, comprehensive consideration of the reflector efficiency, high pressure sodium lamps and lanterns efficiency generally only 70%. But the LED's light, if use directional out right match light design, most light will directly onto the road, lamps and lanterns efficiency can reach 85%.
So, only from efficacy and lamps and lanterns, you can see the efficiency LED lamps to replace traditional street lamp illuminant enormous potential. Therefore, this article will from sun yat-sen university semiconductor lighting system research center in the development process of LED lighting applications to match light, power and cooling etc three key technology achievements of "ten cities to mainly describes the light" demonstration application engineering million closely "LED street lamp" technical route and technical support.
Currently on the market LED lights, and its illuminant of the main points in two ways: single 1 W high-power white LED arrays and high-power integrated packaging light module. Although LED lamps national standards are not yet available, but LED street lamp light distribution in reference to the traditional illuminant when road lighting standards to achieve the following goals: appropriate average pavement brightness; High total illumination evenness and vertical luminance evenness; The right environment ratio; Glare control etc.
Look from light distribution curve to achieve these goals, is primarily through appropriate optical design to obtain bats airfoil light intensity distribution in the pavement, thus obtained rectangular flare distribution. But ordinary high-power white LED encapsulation lens (namely a optical lens) doesn't fit directly applied in led street light, and so in every high-power white led lights on an optical lens to add optic lense(
cheap led lights
), at present "peanuts" type optic lense can achieve good effect. from:
led bulb light