Following Beijing, Guangzhou, Wuhan and Shenzhen, the Shanghai subway is also equipped with LED lighting, LED lighting used in subway become another big area.

As most of the subway lines is designed to be located underground, so the operators time need the lighting, which also makes the subway lighting has become a large part of energy consumption. Compared to traditional lighting LED lighting has a great energy-saving advantages, so the LED lighting to replace conventional lighting in the subway is a matter of course.

In addition, Metro produce shaking at runtime, the life of the general lighting therefore tend to be shorten, making that the lighting products require to be more frequently replaced, and LED as the solid-state light source, better stability, but also the service life is much longer than that of the conventional lighting products, making the staff without having to regularly maintain and replace the lamps.

At present, the number of subway is about 48, while there are 28 cities built the metro, and more traditional lighting are used in the domestic existing subway network. The energy-efficient LED lighting will begin to be replaced with at a total of 14 stations in Guangzhou’s public area lighting systems and other fields this year, the transformation number of lamps is approximately 18,000 units. The public transportation organizations ratp also cooperate with Philips in Paris, France,, which retrofitted 250,000 LED lamps at 302 subway stations of the rapid rail network in Paris transport system and 66 suburban stations, the market potential of the LED underground lighting can be described as significant enormous.
China promulgated the “underground places lighting with LED lamps technical specifications”, detailed the subway procurement specifications of the LED lighting to open the standardization road of LED lighting for the subway, LED lighting applied to the subway will be more extensive.

Nowadays，the LED tube light is the representative of subway lighting that is most widely used underground，which also enjoys a great popularity in our corridor, restaurants, shopping, leisure and entertainment, galleries, exhibition halls and other indoor environments, the LED flood light as the representative of the outdoor decorative lighting is mainly used in city squares, parks, stadiums, the facades of large commercial buildings and hotel, stage, waiting rooms, airports etc. where the higher brightness lighting is needed to illuminate, Lead Lighting adopts high brightness SMD as the light source of the LED tube and highly integrated and high brightness COB as the light source of the LED flood light, which fully guaranteed stability and soft light of the LED tube light and octahedron breadth and brightness irradiation range of the LED flood light, while the low voltage constant current driver converts the AC into DC so that improve energy efficiency and reduce the waste heat energy and stroboscopic effect exciting the human eye, the most important is that the LED lighting without adding mercury and other heavy metals harmful to our body and pollution the environment, that’s why the LED light is famous for energy-saving and environmental protection ，login www.ledclan.com to learn more features and uses of the LED tube light and surf www.lead-lighting.com to know more awesome LED floodlights and other LED lighting.

Recently, supported by the American municipal solid street lighting committee (MSSLC), the U.S. Department of Energy (DOE) published a report on comparison test reports of the gateway performance of the nine kinds of LED lamps and high pressure sodium (HPS) lamps. The trial, initiated in Kansas City Missouri in 2011，which proved that LED lights were not worse than HPS lamp performance in any way, such as light intensity or effect. However, solid-state lighting (SSL) products indeed can produce more lumens on the road， while reducing the scattered light.

The experiment involved 100W, 150W, 250W and 400W LED tunnel light and LED street light that are used to replace the high pressure sodium lamp. Lighting products include 63W LED tunnel light and LED street light used to replace 100W HPS and 291W LED lamps replaced 400W high pressure sodium lamp. The measured energy reduction ranged from 31% to 51%, with an average is 39%. However, the average lumens LED lamps produce is 31% less than that of the high pressure sodium lamp

Although the efficacy of the two LED lamps compared is lower than that of the high-pressure sodium，yet the average efficiency of the LED tunnel light and LED street light is 15% higher than the HPS. By comparing the number of state and input power exposed to the target area, the application effect is more obvious. However, there are still two kinds of lighting whose efficacy performing is below the existing high pressure sodium lamp.
However, in some cases, the advantages of the LED lights is very obvious. For example, 130WLED street lights and LED tunnel light used to replace the 150W HPS, their average application efficiency advantages is 83lm / W ratio 45.1lm / W. As can be seen in the report ，the tested for the LED and HPS products are in the vicinity of the light emitted from the light spilling circumstances. However, compared with the non-fugitive 250W light, the luminous efficiency of the LED lamp is 47lm / W, and the high pressure sodium lamp is only 33.6lm / W.

In comparison test 400W, the performance of a LED lamp is better, and the other is worse. According to another report released by the DOE recently showed that outdoor lighting, LED streetlight and LED tunnel light are continuing efforts to replace 400W HPS. Currently there have been some cases of 400W replacement on the market.
Taking these results, the gateway report concluded, the applications effect of the LED lighting is slightly prominent over that of the HPS lighting. However, SSL lighting can provide more efficient and uniform illumination light while reducing fugitive, so its energy savings is better.

The report also predicted what the LED products made impact on the maintenance costs. There is currently a project in Kansas City, which responsible for monitoring illumination level t and timely replacing the lamp whose performance is below the design standards.

The study also included that the optical loss based on the assessment of lumen maintenance factors, the results showed that the two high-pressure sodium lamps needs to be replaced before the expected life. This conclusion also applies to certain LED products, but the replacement cycle is 30 years. The study did not disclose the actual maintenance costs, but solid-state lighting products undoubtedly have a significant advantage in this area.
Meanwhile，there are a large number of high-quality LED manufacturer emerging over the world,especially the China that is famous for manufacturing，Lead lighting is one of professional enterprise specializing in researching and producing the LED lights,lead lighting has been continuing to strengthen the use of certified raw materials such as LED chips, LED drivers, heat sinks, shell, etc., and improve R & D and production team, striving to adopt the best materials and technology to produce best quality LED flood light, LED tunnel light, LED tube light and other indoor and outdoor lighting, using highly integrated high-brightness COB as the light source of the LED Flood light and LED tunnel light and other outdoor lighting，adopting high brightness SMD LED as the light source of the LED tube light, the low-voltage constant current driver ensure the alternating current can be convert into direct current so that improve the energy use and reduces the stroboscopic effect stimulating the human eye, fully guarantee octahedron illuminated area of LED flood lights and bright light to adapt to outdoor open environment ，the soft and bright light of the LED tunnel light and LED tube light makes us safe driving in tunnels and enjoy work and study.As an ISO 9001:2000-certified factory,the lead lighting can meet the strict standards of CE, RoHS, FCC certificate, these strict producing standards guarantee our products distribute smoothly both in domestic and international markets. visit www.ledclan.com to Learn more vivid and specific characteristics of the LED tube light or click www.lead-lighting.com/products/bid32-1.htm for more detailed and professional LED tunnel light or return homepage for other other LED lighting.

There are variety LED flood light on the lighting market, such as the anti-glare floodlights and explosion-proof floodlights，there are massive choices for consumers, the purchasing way of many consumers is unscientific, we will interpret the mistakes when choosing the LED Flood light .

1, select cheap LED flood light, the difference of the price of the same type of lamps may be nearly doubled, the consumers are always demanding cheaper, while the businesses will take out poor quality lamps to attract us with low prices. This is not correct, the low-priced products tend to be low-level, the LED flood light we use t is intended to environmental protection, long life, ostensibly the origin and brand of the lamp is not the same, but there is indeed big difference between the power driver and chip of the LED flood light, in addition the quality of lamp beads directly affects the lamp brightness, low quality LED flood light consumes greater power and generate severer heat and its insecurity is higher.

2, the decorative effect many consumers are used to proceed from the exterior of the LED floodlights but to ignore the quality when choosing，which partly because they do not know how to identify, basically, we should look for product specifications and certificates and other basic accessories in the product packaging , the current appearance of the lamps is colorful and unique, do not be misled by the so-called delivery evidence the salesmen said but no certificate when buying , these lamps tend to come from small workshops, there is no guarantee safety and quality, the best way is choosing the brands whose specifications and certificates is complete

3, the most high-power
The misunderstanding is that the lighting effect of the lamp is power, in fact, the decision of the lighting effects is the flux of the LED flood light, power, light is not natural, we must ensure that flux, the size of the luminous can be viewed in the instruction manual, the quality of light beads, luminous flux and power driver are different, differences, please be careful when selecting.
Nowadays，the LED tube light is the representative of residential lighting that is most widely used in daily life，which enjoys a great popularity in our corridor, restaurants, shopping, leisure and entertainment, galleries, exhibition halls and other indoor environments, the LED flood light as the representative of the outdoor decorative lighting is mainly used in city squares, parks, stadiums, the facades of large commercial buildings and hotel, stage, waiting rooms, airports etc. where the higher brightness lighting is needed to illuminate, Lead Lighting adopts high brightness SMD as the light source of the LED tube and highly integrated and high brightness COB as the light source of the LED flood light, which fully guaranteed stability and soft light of the LED tube light and octahedron breadth and brightness irradiation range of the LED flood light, while the low voltage constant current driver converts the AC into DC so that improve energy efficiency and reduce the waste heat energy and stroboscopic effect exciting the human eye, the most important is that the LED lighting without adding mercury and other heavy metals harmful to our body and pollution the environment, that’s why the LED light is famous for energy-saving and environmental protection ，login www.ledclan.com to learn more features and uses of the LED tube light and surf www.lead-lighting.com to know more awesome LED floodlights and other LED lighting.

As we all know，after the procurement officers of many companies that need to purchase LED flood lights or unit understood the market quotation, we found that the price of the LED flood lights is significant different. difference on the market. For example 10W LED flood light, some reported to me is USD19.00/PC, some factories reported to me is USD8.00/PC, Why there is such a big difference with the Price of the LED flood light?
There are three important parts of LED flood light: LED lamp beads, power, and enclosure. There are many different chips used for the Lamp beads, a SUMAKE 35mil, 45mil, or Bridgelux 45mil, there are some done by the domestic chip manufacturers, the price is different, we’d better let the party provides the proof of the chip. Power is in the heart of light, and now the power has been very complexly done, the quality is uneven. Better to look at the brand and certification. Then is housing, what should be considered is mainly that whether the heat and water is well treated. In a word, what you want depend on how much you pay. It is difficult to want cheap but good quality products.

Another aspect is how the company’s overall strength, quality control capabilities, delivery capability, as well as after-sale protection capabilities, these aspects must be considered. Therefore, the price is different in different companies.
Of course, there are many excellent LED lighting supplier in the global LED lighting market,, Lead lighting which is located in China’s Pearl River Delta region that is known as manufacturing – Shenzhen Pinghu，Lead lighting is one of professional enterprise specializing in researching and producing the LED lights and has been continuing to strengthen the use of certified raw materials such as LED chips, LED drivers, heat sinks, shell, etc., and improve R & D and production team, striving to adopt the best materials and technology to produce best quality LED flood light, LED tunnel light, LED tube light and other indoor and outdoor lighting, using highly integrated high-brightness COB as the light source of the LED Flood light and LED tunnel light and other outdoor lighting，adopting high brightness SMD LED as the light source of the LED tube light, the low-voltage constant current driver ensure the alternating current can be convert into direct current so that improve the energy use and reduces the stroboscopic effect stimulating the human eye, fully guarantee octahedron illuminated area of LED flood lights and bright light to adapt to outdoor open environment ，the soft and bright light of the LED tunnel light and LED tube light makes us safe driving in tunnels and enjoy work and study.As an ISO 9001:2000-certified factory,the lead lighting can meet the strict standards of CE, RoHS, FCC certificate, these strict producing standards guarantee our products distribute smoothly both in domestic and international markets. visit www.ledclan.com to Learn more vivid and specific characteristics of the LED tube light or click www.lead-lighting.com for more detailed and professional LED lighting.

LED Luminous Flux (lm)
Because the human eye have different sensitivity to different wavelengths of electromagnetic waves, we can not directly use the radiated power of the light source or the radiant flux to measure the light energy, the unit based on the amount of light the human eye sense must be used —- the luminous flux measure. Expressed by the symbol Φ flux in lumens (lm).

LED luminous intensity (cd)
The Flux illustrates the total light energy emitted by the light source to the surrounding space. The flux distribution the different light emitted in the space is different. The unit of luminous intensity is candela, the symbol is cd, which represents the light flux emitted at solid angle of the light source steradian of a unit (formed by the surface angle against the point light source) of. 1 cd = 1 lm / 1 sr (sr: solid angle steradian units).
LED Brightness (cd/m2)

Brightness is intensity of the emitted light from a certain direction that the eyes see objects. The units is candela / square meter [cd/m2], the symbol is L, indicates the luminous flux of per unit area in the direction of light at a specific unit solid angle ​​, which is equal to 1 candelas luminous intensity issued on one square meter surface.

LED Color Temperature (Color Temperature)
When the color of the light the light source emitted is the same as the color radiated by the black body at a temperature, the black body temperature is called the color temperature of the light source, the absolute temperature K is used to represent. When the light source color of the light emitted by the black body radiation at a temperature is close to a color, the black body temperature is called the correlated color temperature of the light source.

Nowadays，the LED tube light is the representative of residential lighting that is most widely used in daily life，which enjoys a great popularity in our corridor, restaurants, shopping, leisure and entertainment, galleries, exhibition halls and other indoor environments, the LED flood light as the representative of the outdoor decorative lighting is mainly used in city squares, parks, stadiums, the facades of large commercial buildings and hotel, stage, waiting rooms, airports etc. where the higher brightness lighting is needed to illuminate, Lead Lighting adopts high brightness SMD as the light source of the LED tube and highly integrated and high brightness COB as the light source of the LED flood light, which fully guaranteed stability and soft light of the LED tube light and octahedron breadth and brightness irradiation range of the LED flood light, while the low voltage constant current driver converts the AC into DC so that improve energy efficiency and reduce the waste heat energy and stroboscopic effect exciting the human eye, the most important is that the LED lighting without adding mercury and other heavy metals harmful to our body and pollution the environment, that’s why the LED light is famous for energy-saving and environmental protection ，login www.ledclan.com to learn more features and uses of the LED tube light and surf www.lead-lighting.com to know more awesome LED floodlights and other LED lighting.