[Introduction] The maximum output power of LED street lights can only be up to 150W at most. Further up, light distribution may be very difficult to do, because LED street lights are not point light sources, it requires hundreds of LEDs to achieve output power of more than 150W. And a LEP can now reach 500W. LEP street lamps are point light sources like traditional HPS or halogen lamps. Light distribution is easy and energy saving. Therefore, the future of the 250W-1000 watt HPS or halogen street lamps market must be the world of LEP street lamps .
Today 250W-1000W high pole street lights, construction site lighting and parking lot lighting are basically the world of HPS (high pressure sodium lamp) and halogen lamps, but as energy saving and maintenance requirements are getting higher and higher, this market will gradually Give way to the emerging LEP (Plasma Light Source) street lights.
The traditional street lamp market below 250W will quickly give way to LED street lamps, because LED street lamps enjoy energy-saving subsidies in China, and the LED light source supply market is fiercely competitive, and prices have fallen rapidly. The same is a solid-state energy-saving light source, but the LEP light source has not been able to enjoy this preferential policy, and the supplier is currently only Luxim.
The following is the actual effect of LEP street lights in Guangdong New Material Road. 275W LED street lights replace 400 watt high-pressure sodium lamps, which not only saves power and maintenance costs, but also improves night visibility by more than 2 times.
Figure 1: There are pictures and truth. The picture above is the lighting effect of 400W high pressure sodium lamp (HPS), and the picture below is the lighting effect of 275W LEP street lamp. This is New Material Road, Guangdong, China. The alternative advantages can be summarized as follows: 1) LEP (plasma light source) can save 44% of electric energy compared with high-pressure sodium lamps; 2) Maintenance costs can be saved by half, because the life of LEP street lamps is three times that of HPS street lamps; Reduced electricity cost from 400W to 275W; 4) improved light quality (from yellow to white), night visibility increased by 2.4 times; 5) investment can be recovered in only 22 months.
The working principle of LEP is to introduce RF energy to the quartz glass luminous body through the ceramic resonator, thereby releasing a powerful luminous plasma. Like the LED light source, the LEP plasma light source is also a solid-state light source. However, it can produce several hundred watts of output power per LED, while the LED can only produce a few watts of power at most. The LEP light source is only provided by the Luxim company in the United States. The highest level is that a LEP can provide 500 watts of output power.
Taking into account the actual light output efficiency of LED lamps, today 150-watt LED street lamps should be able to replace 250-watt HPS street lamps or halogen lamps, because no matter whether it is performance, price, maintenance cost or energy saving effect, LED street lamps have an absolute advantage. However, since the output power of an LED is only a few watts, the LED street light is actually a surface light source instead of a point light source, and the light distribution of LED street lights above 150 watts will become very difficult to do, so even LED street lights above 150 watts have cost-effective advantages , But basically customers will no longer consider LED street lights.
LEP street lights can make up for this fatal deficiency of LED street lights, because it is a point light source like traditional street lights, and light distribution is easy to do. Since the light output of 500 watt LEP street lights is even better than 1000 watt HPS lights, even if it is to replace 1000 For watt HPS or halogen street lights, only one LEP light source is enough. In the future, in the LED street light market, LEP light sources and LED light sources can be said to be a mix of high and low, complement each other. High-power street lights will definitely be the world of LEP in the future, and small and medium-power LED street lights will be the world of LED.
Randy, the marketing director of LUXIM in the United States, also made it clear: "LEP is not a substitute for LEDs, but a complementary product. In terms of illuminance, one LEP bulb is equal to 200 LED bulbs, and the cost is half cheaper than LED. , Parking lot lighting, commercial lighting and other large infrastructure projects are very suitable. "
7 reasons to choose LEP light source
The LEP light source is different from the traditional metal halide lamp, high-pressure sodium lamp, electrodeless lamp, and also different from the LED light source. It is a completely new luminescence principle. Its luminous intensity is much higher than that of LED and HID, at least an order of magnitude higher, one LEP It can replace 150 LEDs or even 300 LEDs without sacrificing system efficiency or increasing system overhead, including size and cost. The LEP light source combines the reliability of the LED solid-state light source with the high brightness and full spectrum advantages of the HID light source. In addition, the color rendering index of the LEP light source can be as high as 95%.
The 7 main reasons for choosing LEP light sources instead of LED light sources are as follows:
First, energy saving: compared with traditional lighting, saving more than 50% of energy costs. The energy saving of LEP mainly comes from light source efficiency and application efficiency. The light efficiency (lumens per watt) of LEP is 15% -20% higher than that of the traditional HID (high pressure gas discharge lamp), mainly because compared to HID lamps, LEP has no energy consumption on the electrode. In terms of lighting applications, the use efficiency of LEP lamps will be higher than that of traditional HID, electrodeless lamps or LED lamps. Mainly because the LEP light source is a directional point light source. The directional light source avoids the waste caused by light reflection and other factors inside the lamp.
Second, worry-free reliability: LEP light source eliminates the various failure modes and light decay problems that occur in traditional light sources. Even if it continues to work for a long time, the electrodeless quartz bulb of LEP will not have the problems of electrode failure or blackening of the inner wall of the bulb, which occurs in traditional light sources.
LEP's unique solid-state RF cavity design can ensure that the light source can work for a long time and continuously. Unlike LED lamps, LED lamps require many low-power LEDs to produce enough light, while LEP only needs a small quartz bulb to produce enough light. Thereby greatly reducing the failure rate and enhancing the reliability of the system. In addition, the LEP light source can maintain 70% of the luminous flux after 50,000 hours of continuous use.
Third, the light quality is high: the light emitted by the LEP is full-spectrum white light. Unlike LED and electrodeless lamps, LEP does not require the use of phosphors for secondary conversion. The natural light emitted by LEP can greatly enhance the visibility and color display, and the color rendering index can be as high as 95%.
In road lighting and outdoor lighting applications, the LEP full-spectrum feature greatly improves the visibility of pedestrians and drivers at night.
Fourth, LED's incomparable light distribution performance: LEP emits directional Lambert light through a very small electrodeless quartz bulb. In terms of the optical performance of lamps, point light sources have great advantages. On the premise of ensuring the uniformity of lighting, it is easier to design the required cut-off type and light distribution design.
In addition, LEP's directivity greatly improves the efficiency of the luminaire. Most of the light emitted by LEP is directed to the area that needs to be illuminated, avoiding the loss of secondary reflection or even multiple reflections. In most applications, the light output efficiency of LEP lamps can be as high as 90%.
Fifth, LEP is the only high-intensity point light source in the industry that can be dimmed: a controllable solid-state drive and a responsive light source emitter enable the LEP light source to be dimmed to 20% digitally or analogly within seconds. The use of devices such as dimmers and sensor switches helps to further reduce energy consumption and operating costs.
Sixth, the LEP light source overcomes the instability of LED luminous intensity, breaks through the bottleneck of LED long-term light decay, unstable life, and is not easy to dissipate heat. It achieves low light decay, continuous brightness, and 50,000 hours of light efficiency The characteristic of light decay is only 20%. At present, no matter what kind of light source this characteristic is, it cannot be achieved. The LEP light source is mainly radiant heat dissipation, and the attenuation of heat on the LEP light source is very small.
Seventh, the light efficiency of the LEP light source can reach up to 150 lumens per watt. The highest luminous efficiency of the LEP plasma light source has now reached 150lm / W, and the lifespan has reached 50,000 hours. The LEP technology is a supplement to the LED lighting technology in the high lumen application field.
The power of the existing commercial LEP light source has reached 266W. Compared with the traditional light source, although the LEP light source is a low-power lamp, if it considers its high luminous efficiency, it is not a "small character".
The total luminous flux of the LEP light source is about 17800LM, which is equivalent to the total luminous flux of the 400W metal halide lamp or the total luminous flux of the 750W tungsten halogen lamp. In addition, compared with the LED light source, the total luminous flux of the LEP light source is equivalent to the total luminous flux of dozens, or even hundreds of "high-power" LED integration.
In this sense, a single LEP light source has achieved the effect of high power and large luminous flux. The LEP light source is in the stage of rapid development. With the emergence of 500W LEP light source, the total luminous flux of the LEP light source can reach 700W The luminous level of halogen lamps, even 1200W metal halogen lamps.
The performing arts stage requires high-illuminance lighting and high-luminance lamps. A single large-luminance, high-color rendering LEP light source just meets the needs of professional lighting for the performing arts, avoiding the problem of large integration of LEP light sources.
8 successful application cases of LEP light source
1. Ford dealer Showroom lighting
Dave Littleton Ford used LEP high pole lights to transform his large outdoor Showroom lighting system because he wanted his car inventory to look more attractive and save power.
2. International cargo port adopts LEP light source to upgrade lighting system
The loading and unloading work of commercial freight ports puts a high demand on the light quality and reliability of the lighting infrastructure. It requires that very bright light can be accurately distributed to a wide area to ensure safety at any time of day and night operating.
3. LEP lamps replace fluorescent tubes in manufacturing workshops
Improving lighting in the workplace while saving electricity is a priority for Silicon Valley manufacturers in the United States. It is an obvious choice to replace the existing T12 fluorescent tubes with LEP lamps. This upgrade not only greatly improves the brightness of the working environment, but also saves more than $ 300 per lamp per year. In addition, technicians can complete the installation work in less than a day, because the new solution only needs to install 18 LEP lamps, which can replace the original 60 fluorescent lamps.
The benefits of this replacement can be summarized as the following five points: 1) The total output power can be reduced from the original 9600W to 5040W, a reduction of 47%, greatly reducing the burden on the grid; 2) The unit light output has increased by 49%, from the original 47ft-cd to 70ft-cd; 3) CRI increased from 70% to 95%, greatly improving the display quality; 4) Lamp replacement cycle was extended from the original 2 years to 6 years, greatly reducing maintenance costs; 5) After replacement 24 The investment can be recovered within a few months.
The following table details the performance comparison of the lighting system before and after replacement
4. LEP lights illuminate the middle school gymnasium
The San Francisco High School in the United States hopes that the stadium will have better lighting effects and also hopes to reduce environmental pollution.
5. American Silicon Valley parking lot LEP lighting fixture
Replacing HPS lamps with LEP lamps can save 55% of electrical energy, reduce carbon emissions and improve lighting effects.
The benefits of this replacement are summarized as follows: 1) 55% electricity savings; 2) 0.85 tons of carbon emission reduction per year; 3) maintenance costs are reduced by half; 4) time is reduced by one third compared to typical lighting system installation; 5) The lighting is very uniform and there is no dead angle at all; 6) The safety environment at night becomes better because the color reproduction is realistic; 7) The motion sensor is used to adjust the high and low brightness.
Comparison of lighting performance between 400W HPS street lamp and 209W LEP lamp
6. Lighting effect of LEP road in Guangdong, China
7. Upgraded 600 street lights in Indiana to LEP lamps
When the city of Scottsburg, Indiana, decided to upgrade its HPS street lights, they found that the LED street light solution was too expensive for their budget, and it was impossible to provide the brightness they wanted without adding additional telephone poles.
When they found that the LEP solution allowed them to significantly reduce the number of street lights while maintaining the brightness of their existing lighting, they became interested in LEP street lights. LEP lighting manufacturer Stray Light OpTIcal Technologies helped the city upgrade 600 HPS street lights.
This alternative benefit can be attributed to: 1) while maintaining brightness and safety level, the number of lamps is reduced by 30%; 2) compared to existing HPS solutions, it can save 60% of electricity; 3) greatly reduced maintenance And the cost of electrical energy, so that the investment can be recovered in only 18 months; 4) each LEP lamp saves more than 200 US dollars of electrical energy each year; 5) the replacement cycle of street lamps is extended from the original 4 years to 11 years; 6) night visibility is increased by 2.4 times .
The detailed performance comparison table is as follows
8. The processing workshop of Ningbo Steel Factory uses LEP lamps for lighting
Ningbo Steel Factory once considered using 250W HPS lighting fixtures in its processing workshop before discovering LEP industrial and mining lamps. However, they found that LEP industrial and mining lamps can not only save half of the electricity, but the solution can also emit the same color of light at night as during the day. Greatly improve its production efficiency and safety.
The benefits of this replacement include the following four points: 1) The total output power is reduced from 5040 watts to 2880 watts, a reduction of 43%; 2) More than double the brightness of dark light and the brightness of matched bright vision; 3) CRI is increased from 20 to 75; 4) The replacement period of lamps is increased from 3 years to 9 years, which greatly reduces the maintenance cost.
The detailed performance comparison table is as follows
LEP light source market prospect
As a new generation of plasma light source, LEP street lamps have gradually been applied in domestic pilot projects. Shenzhen, Shenyang and other cities have already adopted municipal projects. Ningbo City replaced new LEP street lamps for some road sections in July last year and carried out the practical situation of street lamps. Measured on site. Changsha Zhaote Optoelectronics also signed a technical cooperation agreement with LUXIM Corporation of the United States last year to introduce LEP technology into the country. At present, the domestic LEP street light suppliers mainly include Guangzhou Kaiming Lighting Appliance Co., Ltd. (street lights, square lights) and Shenzhen Daosheng Electronic Technology Co., Ltd. (Street light) etc. LEP lamps have also been used in many countries such as the United States, Japan, and the Netherlands.
As governments around the world have higher and higher requirements for energy saving and emission reduction, traditional lighting fixtures can no longer meet this requirement, so emerging energy-saving lighting technologies such as LED and LEP will surely get rapid development. However, because LEP has not yet been able to enjoy government subsidies and there are few suppliers of LEP light sources and their solutions, the main market development space for LEP light sources in the next few years will also be mainly limited to market areas where LED solutions cannot be achieved, such as 250 High-power road, port, airport and parking lot lighting other than tiles. LED lamps and lanterns will use their cost-effective advantages to sweep the market of lighting lamps with power below 250 watts.
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