Street light

Currently, LED lighting technology matures, high-power LED light effect has been achieved 100lm / W or more, which makes the city street lighting energy saving possible. LED lights, especially high-power LED street light, the impact of a rapid pace is the traditional street market.





High power LED street lamp suggests that it is greater than 30 watts or more, the semiconductor light source using the new LED lights. Currently the standard LED lamp illumination uniformity is generally the road (uniformity of road surfaceilluminance) the average intensity of 0.48. Spot ratio of 1:2, in line with the road illumination. (Actually 1 / 2 center spot to 25LUX, 1 / 4 center of light intensity to 15LUX, 16 meters from the lowest light intensity 4LUX, overlapping light intensity of about 6LUX.




Intelligent LED street lighting



Lens materials currently on the market street improvements optical material, transmittance ≥ 93%, temperature -38-- +90 degrees, anti-UV Yellow UV `no change of the rate of 30,000 hours and so on. Lighting in the new city which has a very good prospect of application. Dimming of the depth and color and other characteristics will not change due to dimming. Solar LED street lamp refers to the use of solar panels to supply power silicon LED lights.





Standard:





1. Light conversion rate 17% (amount of solar energy per square 1000W, the actual utilization efficiency 170W)





2. Lamp lens materials currently on the market improved optical materials, transmittance ≥ 93%, temperature -38-- +90 degrees.





3.LED lamp lens, mainly for the LED lights of the lens, the spot is rectangular, the material is PMMA optical material, transmittance ≥ 93%, temperature -38-- +90 degrees, anti-UV UV `rate of 30,000 hours without yellowing change,





4. Road illumination uniformity (uniformity of road surfaceilluminance) the average intensity of 0.48. Spot ratio of 1:2





5. Comply with the road illumination. (Actually 1 / 2 center spot to 25LUX, 1 / 4 center of light intensity to 15LUX, 16 meters from the lowest light intensity 4LUX, overlapping light intensity of about 6LUX.





6. It is in the new city lighting has a very good prospect. Dimming of the depth and color and other characteristics will not change due to dimming.





7. Adaptation Humidity: ≤ 95





Despite the rapid pace of development of LED lights, led lights, but the standard is relatively slow. On a global scale, LED street lights are not standard is not, like LED lights, there are now European standards. In fact, all regions of the LED street lamp standards, different indicators, LED street lamp standards to meet the requirements of sales area, so tender-depth study of LED street lamp project to the local standard of LED lights, the only way to the shock split competition in the market place.





Thermal Design


LED street lamp design of the main design of the traditional focus on the LED's lumen, while the LED heat lamps while less attention.




LED lamp heat



In fact, LED lumens number is rapidly increasing. 2009 single-watt LED production has reached 100 lumens lumen, and this value is rising fast. Corresponding system of heat transfer theory has matured, we can basically use the heat transfer means clear: conduction, convection, radiation and phase change heat transfer. Therefore, in the heat or the heat issue, we can take measures to be visible, and limited.



Cooling technology


LED street lamp cooling technology, generally used for the thermal conductivity of multi-board arrangements, a 5mm thick copper plate is, in fact, be regarded as uniform temperature plate, average temperature of the heat off; also installed heat sink to heat, but the weight is too large. Street light system weight is very important because there are 9 meters high street, if too much risk to increase, especially if typhoons, earthquakes may produce unexpected. Domestic manufacturers to adopt the world's first needle-like cooling technology, needle-like radiator thermal efficiency than conventional heat sink has a substantial increase in sheet, enabling LED junction temperature of 15 ℃ lower than the average over the radiator, and water resistance than conventional aluminum radiator is better on both the weight and volume also improved .



Cooling mode


LED street lamp cooling methods are: natural convection cooling, install a fan forced cooling, heat pipes and loop heat pipe cooling and so on. Install a fan forced cooling mode system complexity, low reliability, heat pipes and loop heat pipe cooling means high cost. And outdoor use at night with lights, heat, and body surface in the side of the above restrictions, which are less conducive to the advantage of natural convection of air, so the LED lights as options recommended way of natural convection