the LED street lights of large-scale applications, the general concept that still needs some time. but really I think the LED lamp technology matured. Welcome to correct me.
1 streetlights LED light output has not yet reached the level of sodium;
2, the lifespan of LED street lamps;
3 Photometric LED street lights is not ideal. LED lamps are spoken, many people leave the controller index screen LED color as the color index high density sodium LED display much and may by public LED lighting as a standard, called independent to the standard LED street reduces lamps change, in fact, Macro Shang see hope actually sent Yu environmental change, and I think also be the current standard street lighting no change is required. It was completely replaced another reality of LED light only in the area of LED lighting efforts of the people themselves.
light output problems:
First sodium light effect is high, I see a little more of the units lumen sodium food products are above 110 and well in LED 90lm / W do nothing more energy efficient. but if the efficiency of the lamp comparison, conclusions on the fact, rather than a. for general lighting are 360 omnidirectional uniform brightness, and the brightness of the LED is directional, is usually 180 from inside, so the difference is not the lamp of it. sodium lamp or conventional light output of the lamp lighting the lamp is usually 60%, LED lamps can reach 90% lighter. The effective light weighted sodium streetlights can 66Lm / street light LED lamp 80lm W and really get a / W
Second, because it is a course lamppost the only waterfall on the ground of light that continues to flow down the street you will see that the national minimum standards H = Weff example, sodium lamps better utilization coefficient of 0.3 is required, [url =] driver [/ url], if the duty cycle LED 0.8, then the current output LED light, 110W LED street lights in the box filled with sodium replaced 250W if the cost of the real technical factors into consideration to design drawn 1.2Weff words generally consistent with H =, LED lamps 250W 100W sodium, this stage will be replaced on the implementation in May. to reach 60%, while the level of energy saving has sufficient energy saving effect. 0.8 coefficient LED lamps This view of the distribution of staff street lighting design foundation, it is actually not difficult.
life issues:
If you said that the life of the LED lamp of 100,000 hours or 50,000 hours, 30,000 hours, which is rather disbelieve, but remember that you are asked you ask how, if known, who had even heard when they say they are it has been measured, must be made not to test the number of hours of data for the Foundation because now I definitely do not want anyone million hours had meter test this, the future is impossible a silly way because it is not necessary. 1000 hours of data will tell you it does not matter, because a lot of tubes LED light output is increased to 1,000 hours. controller and, of course, LED, while the tube. Now the time of the test is international life 1000 + 5000 hours 1000 hours Yiqian for stability time data Hou 5000 hours life calculation according to the proof of life of over 5,000 hours of less than 5000 hours within the expected curve out of the calculation of thrust. us real test 1 + 5,000 hours of light lost 2.2% and is linear, if we consider a certain margin, which are standard products for 5,000 hours of light failure 2.5% to 50% off effect of light, the momentum life is 100,000 hours 70% of the photosynthetic efficiency of life expectancy is 60,000 hours.
But whatever the 50% meets 70% Calculation of life are not important, in fact, most of science for many national by the method used is kept low as a rule is not seen practically remained life. As maintained Go to 20LX, when it is expected that initial streetlights median average load as fast 30LX offers light effects estimate the life of 66%, so that the calculation of lifetime is 66,000 hours is. LED control when control lamp after midnight, in real time up to 100,000 hours. recognize, of course, we can really have time to wait 25 years before they know.
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