The most direct way to improve the brightness of power led road lights is to increase the input power is bound to increase the input power in order to prevent saturation of the active layer must increase the size of the pn junction; junction temperature rise and thus make the quantum efficiency. Single-tube power increases depends on the device the ability to export heat from the pn junction to maintain the existing chip material, structure, packaging technology, the current density on the chip the same and equivalent thermal conditions, a separate increase the size of the chip junction area The temperature will continue to rise.

 

LED luminous efficiency is relatively low, causing the junction temperature rise, lower life expectancy. To improve life in order to reduce the junction temperature must be very great importance to the problem of heat dissipation. LED thermal design must start from the chip until the entire radiator, every aspect should be given full attention. Any aspect of poorly designed and will cause serious thermal problems. Led road lights in the long-term work in a lot of failure, more than half are caused by the lack of thermal design, the other half is caused by power failure. Therefore, the thermal design must be accorded full attention. With led high bay light efficiency is increased every year, the heat problem will be gradually reduced. I believe that one day we will see the emergence of LED lamps do not need the radiator!

 

Carbon reduction trend, driven by the LED lighting is the trend of non-file, and cooling technology, progress is more relevant to the popularity of speed and range, one can imagine, the future and more advanced cooling technology will continue to promote LED comprehensive lighting soon.

 

 

First LED street lighting (hereinafter referred to as “LED lights”) is a hot topic of the Lighting Industry, especially the past three years the number of LED road lights products increased a lot, test data is changing, these data is to evaluate LED street lamp Photometricthe basis of performance and quality. U.S. Department of Energy (DOE) published in SSL luminaires meet ENERGY STAR qualified criteria in the evaluation of LED road lights – Photometric properties provides us with a reference. Technical papers of Chinese lighting network LED lighting.

 

Correlated color temperature, color space, uniformity, color rendering index given co criterion, the U.S. Department of Energy Energy Star Class A light in August 2008 (the recent call by class B light for the long-term goal), supplementary requirements for minimum light output for outdoor installation of road lighting, ring lumen density, and the the IESNA lamp light distribution classification of the beam uniformity, and lighting energy efficiency benchmarking.

 

Supplementary requirements to DOE for a Class A LED road lights based on test results based on measurements from 2007 to 2009 to get the 100 led high bay lights, on the status and level of China’s LED lights photometric data for analysis, to enhance and improve China’s LED the streetlights quality information.

 

This analysis involves the photometric performance of the LED lights, including the light output of lamps along the road’s vertical light distribution along the lateral light distribution of the road, C-90 ° C-270 ° with optical symmetry and beam uniformity and the level of light interception, and also analyzed the energy efficiency of the lamps. This analysis does not involve the color performance and light output of LED road lights to maintain the rate.