LED road lighting need to have important conditions for energy saving

"About LED, we first thought is such, but whether LED road lighting energy saving, in what condition can the real energy saving, is currently the whole industry to think of the problem, the lighting industry association expert Zhao Jianping PHILPS in the Symposium on the table.

In recent years, the rapid development of LED lighting, has made certain achievements, but the overall performance of LED lighting with light color temperature, and there is a new understanding, for example, 4000K and LED color temperature in the following road lighting, more in line with people's visual requirements.

LED has the characteristics of low energy consumption, light concentration, rich color, changeable image, etc., but some of the features used in LED road lighting, is not an advantage, it is the weak. "LED street in the end section is not such?

At the end of last year, three ministries in the bidding document LED street lamp overall energy efficiency of 85lm, but in fact, many companies said it is difficult to achieve this indicator.

According to 80lm calculation, if the light effect is effectively utilized, LED street light 90% light on the need of the road, then the overall use of LED street lamp is 72lum/w.

The high pressure sodium lamp luminous efficiency of 120lm/w, the lighting effect is 70lm/w (road lighting design standards prescribed in the road lighting standards for the minimum efficiency of 70lm/w). Therefore, compared with LED, the use of high-pressure sodium lamp with light scattered, and if the effective utilization of high pressure sodium lamp is 80lm/w, its overall energy efficiency is 67lum/w.

Under the same conditions, the overall efficiency of the LED street lamp is 72lum/w, compared with the high-pressure sodium lamp 67lum/w, higher energy efficiency. Comparison of PHILPS lighting cosme, because of its small luminous body, with a relatively good luminosity, light efficiency of 140lm/w, very suitable for road lighting. Under the same conditions, cosme lighting efficiency is better than high voltage sodium lamp is increased by about 5%, the overall effective utilization value of 89lum/w ", Zhao Jianping analyzed three different whole lamp under the same conditions of effective use of high value LED reporter.

From these three data, cosme is the most energy efficient, followed by LED, and then high-pressure sodium lamp, LED no cosme energy saving, but applied to the field of road lighting energy saving than high-pressure sodium lamp.

"Such LED truly reflected in the replacement of traditional incandescent lamps, such as hotels, residential buildings and other places with incandescent lamps to replace 20W 6W LED, can save energy more than 70%, if the halogen lamp to replace 100W with LED light 25W, such as more than 70%," Zhao Jianping told reporters.

LED energy saving potential, how to save energy?

Compared to the high pressure sodium lamp, LED biggest advantage is flexible control, you can change the power, LED Street experts said.

LED application in the field of road lighting, if 10 hours a day to work, after midnight for 5 hours, then energy is mainly reflected in the middle of the night. Due to the introduction of the control system, by adjusting the voltage, the power can be reduced by 2/3. And according to the operation of the vehicle, automatic adjustment of light, reduce power.

"LED is a very good advantage in the field of road lighting, which can be used in the field of LED lighting. "

In addition, the biggest feature of LED is a single low power.

For high-pressure sodium lamps, the original road does not need 250W, 200W may reach the road lighting design needs. But LED used in road lighting, can provide 200W lamps. "

Therefore, due to the characteristics of low power, LED is not limited by the specifications, can achieve the effect of energy saving. "

LED road lighting energy saving needs preconditions

"In the backbone road, may not use light source of 400W, may 360, 350W source can meet the design standards, in this case, the 400W high pressure sodium lamp does not reduce power, will seem incapable of action, while the use of LED lamp can reflect its energy-saving effect," Zhao Jian Ping said that the regulation is a major factor to realize LED road lighting energy saving.

Energy saving conditions are also reflected in its configuration of intelligent control. LED road lighting with an intelligent control system, is a better way of energy saving, can give full play to the characteristics of flexible LED control.

A special light source is strong LED with you, but if there is no proper use, easy to cause light pollution. LED road lighting to achieve energy conservation, but also consider environmental factors, according to the specific design of the road suitable for lamps. For example, a giant lamp production in many enterprises, as the illumination value is very uniform, but brightness is not enough, not necessarily suitable for road lighting, "Zhao Jianping said the use of LED road lighting but also consider the visual needs of pedestrians and drivers.

Energy conservation is a prerequisite, the use of LED may not be able to save energy, but in some cases, will be energy saving, if these factors should be taken into account, then LED road lighting does have the effect of energy saving.