Definition of LED street lights, what is LED street lights?

LED street light is a kind of road lighting equipment that uses LED (Light Emitting Diode) as the light source. Compared with traditional street lights, LED street lights have higher energy efficiency, longer service life, and better light quality.

The definition of LED street lights can be elaborated from the following aspects:

1.Light source: LED street lights use LED as a light source, LED is a semiconductor device with a luminous effect.

2.Energy efficiency: LED street lights have high energy efficiency and are able to convert electrical energy into more light energy. Compared with traditional street lights, the energy efficiency of LED street lights can be increased by more than 50%, which can save a lot of energy consumption.

3.Service life: LED street lights have a long service life. The life of LED can generally reach more than 50,000 hours, which is longer than that of traditional street lights. This means that the use of LED street lights can reduce more replacement and maintenance costs.

4.Light quality: LED street lights have better light quality. LEDs have better light quality, which can provide a more uniform and soft lighting effect, reduce the generation of glare and shadows, and improve the safety of driving and pedestrians.

5.Energy saving and environmental protection: LED street lights have lower energy consumption and less pollution. Due to their high energy efficiency and long lifespan, the use of LED street lights can reduce energy consumption and carbon emissions. In addition, LED street lights do not contain harmful substances such as mercury, which is more friendly to the environment.

6.Intelligent control: LED street lights can achieve intelligent control. Through the intelligent control system, LED street lights can be dimmed, tinted and timed according to different needs, so as to improve the lighting effect and energy-saving effect.

In a word, LED street lamp is a kind of road lighting equipment that uses LED as a light source, which has the characteristics of high energy efficiency, long life, good light quality, energy saving, environmental protection and intelligent control. With the continuous development and maturity of LED technology, LED street lights are more and more widely used in urban lighting, becoming a green and intelligent lighting choice.

Road lighting is an important part of urban lighting, traditional street lamps are often used, high-pressure sodium lamps emit 360 degrees of light, and the shortcomings of large light loss have caused a huge waste of energy. At present, the global environment is deteriorating day by day, and all countries are developing clean energy. With the rapid growth of the national economy, the contradiction between energy supply and demand in China is becoming increasingly prominent, and there is a serious shortage of electricity.

Therefore, the development of new high-efficiency, energy-saving, long-life, high-color-rendering index, environmentally friendly LED street lamps is of great significance for urban lighting energy saving.

Road lighting is closely related to people's production and life, with the acceleration of China's urbanization process, LED street lamps with directional light, low power consumption, good driving characteristics, fast response, high seismic capacity, long service life, green environmental protection and other advantages gradually into people's field of vision, become the world's largest alternative to the traditional light source of a new generation of energy-saving light source, therefore, LED street lights will become the best choice for road lighting energy-saving transformation.

LED street lights are street lights that use light-emitting diodes (LEDs) as light sources. LED technology is developing by leaps and bounds, and the luminous efficiency is already very high, and it will continue to rise. It is a popular material to replace traditional light sources.

LED street lamps are more energy-efficient than traditional light sources, have a longer lifespan (usually 30,000 hours), and have a higher color rendering index for luminescence. It is a high-quality lighting product.

LED street lamp is to use LED light-emitting chip as the street light source. Because LED is a solid-state luminous emitting, high luminous efficiency, long life, easy control of color temperature, power saving and other characteristics, now the country is vigorously promoting.

LED is the abbreviation of English Light Emitting Diode (Light Emitting Diode), its basic structure is a piece of electroluminescent semiconductor material, placed on a shelf with leads, and then sealed with epoxy resin around to protect the internal core, so the LED has good seismic performance.

To put it simply, it is a street lamp with LED as a light source!

The actual power consumption of traditional street lamps is very large, the brightness is low, the heat dissipation is large, the LED is a cold light source, the power factor is high, the brightness is high, but the light attenuation is particularly large, and it is not suitable for use in cold areas, the power factor is higher than the LED, the brightness is twice that of the LED, the power factor, the light attenuation is almost none, it is the most energy-saving and brightest light source at present, it is very good for street lights, but the lighting decoration is not good, the LED is composed of lamp beads, this can not be compared.

There are many differences, 1: LED is more energy-saving, the traditional one is generally at least 200W or more, and the LED street lamp is generally 60W. 2: LED street lights, long service life, as long as the power supply is good, generally can be lit for a few years.

The energy saving of LEDs, the traditional power consumption.

LED street lamp is semiconductor lighting, it is a solid-state cold light source, with environmental protection and pollution-free, less power consumption, high light efficiency, long life and other characteristics, therefore, LED street lamp is the best choice for road lighting energy-saving transformation.

LED street lights are generally transformed from ordinary street lights, which are city circuit lights with a voltage of 220V. Solar street lamps are generally used for photovoltaic power generation with 12V and 24V low-voltage voltages, and the lamp heads used are LED street lamp heads for lighting. Now the installation of municipal roads is generally LED street lamps to save electricity for lighting and achieve the purpose of energy saving, and the cost of solar street lamps for municipal road reconstruction is higher, so it is generally only used for rural lighting, which is not easy to wiring in remote areas.

The advantages of LED street lights are environmental protection and pollution-free, low power consumption, energy saving and environmental protection, high light efficiency, long life, safety, fast response speed, and high color rendering index.

LED street lamps are different from conventional street lamps in that the LED light source adopts low-voltage DC power supply, high-efficiency white light synthesized by GaN-based power blue LED and yellow, which can be widely used in roads, and the cover can be made with high temperature resistance of up to 135 degrees and low temperature resistance of -45 degrees.

Principle: The first integrated design of radiator and lamp shell, LED is directly connected to the shell, and the air convection heat dissipation is fully guaranteed through the heat dissipation wing of the shell, which fully guarantees the service life of LED street lamps for 50,000 hours. According to the calculation of working 12 hours a day, its life is also more than 10 years, and the maintenance cost is very low; The lamp shell is made of aluminum alloy die-casting, which can effectively dissipate heat and prevent water and dust.

The surface of the lamp is UV-resistant and anti-corrosion, and the overall lamp meets the IP65 standard;

The single elliptical reflector cavity is designed with a spherical solitary surface, which controls the light emitted by the LED within the required range, improves the uniformity of the light output effect and the utilization rate of light energy of the lamp, and highlights the energy-saving advantages of LED street lamps. Compared with the traditional sodium lamp, it can save more than 60% of electricity;

Advantages: no bad glare, no flicker. It eliminates the dazzling, visual fatigue and visual interference caused by the bad glare of ordinary street lights, and improves the safety of driving; There is no delay in starting, and the normal brightness can be reached when the power is turned on, without waiting, eliminating the long-term starting process of traditional street lights; Green and pollution-free:

It does not contain lead, mercury and other polluting elements, and does not have any pollution to the environment;

It is an excellent partner to combine with solar energy, give full play to the advantages of LED DC low-voltage work and energy saving and environmental protection, and combine solar photovoltaic panels with LED light sources to achieve the best cost performance and high reliability for customers.

Applicable places: urban roads, sidewalks, squares, schools, parks, courtyards, residential areas, factories and other places that need outdoor lighting.

LED street lamps are different from conventional high-pressure sodium lamp street lamps, and the light source of high-power LED street lamps adopts low-voltage DC power supply, high-efficiency white light diodes synthesized by GaN-based power blue LEDs and yellow phosphors, which have the unique advantages of high efficiency, safety, energy saving, environmental protection, long life, fast response speed, high color rendering index, etc., and can be widely used in urban road lighting. The outer cover can be made of PC tube, and the high temperature resistance is 135 degrees. Lightemittingdiode (LED) is a high-efficiency solid-state light source based on semiconductor PN junction formed with weak electrical energy, under a certain forward bias voltage and injection current, the holes injected in the p-region and the electrons injected into the n-region are diffused to the active region and emit photons through radiation recombination, which directly converts electrical energy into light energy.

Applicable places:

Urban roads, sidewalks, squares, schools, parks, courtyards, residential areas, factories, and other places that require outdoor lighting.

The key to high-power LED street lights is to have good heat dissipation and stable driving power (constant current, constant voltage) Solar LED street lights, as the name suggests, use solar silicon panels as the first power supply, LED street lights.

Light source (1W-200W).

2.Aluminum alloy heat dissipation aluminum sheet.

3.There is also an LED constant current source (power supply).

Luminaire housings. At present, the LED street lamps on the market are mainly divided into two categories, one is to use the ordinary street lamp shell to install an aluminum plate inside, on which a lot of 3W or 1W lamp beads are arranged with lenses, and the other is to use the open die-casting mold to dissipate the overall shell, the first type of heat dissipation problem is not solved, the second type of cost is higher, as for what other fans, heat pipes, heat conduction films, and other heat dissipation need to be carefully checked for authenticity.

LED street lamp integrates 650V power tube inside, primary side feedback constant current control, no secondary feedback circuit, no transformer auxiliary winding detection and power supply, LED open circuit voltage can be adjusted by external resistance, chip ultra-low working current, wide input voltage 6% LED output current accuracy, LED short circuit, open circuit protection, CS resistance short circuit protection, chip power supply under-voltage protection, over-temperature adjustment function adopts SOP-8 package.

The operating voltage of the street light power supply.

Generally, the recommended working voltage of LED is, after testing, most of them work on, so it is more reasonable according to the calculation formula. The total voltage of n lamp beads in series =

Constant current accuracy of street lamp power supply.

The constant current accuracy of some power supplies on the market is poor, such as the popular recommended scheme on the market, the error reaches 8%, and the constant current error is too large. The general requirement is 3%. According to the design scheme of 3%. The production power supply needs to be fine-tuned to achieve a 3% error.

How wide is the series-parallel connection and wide voltage of the street lamp power board?

In order to make the LED street lamp power supply work in the wide range of input voltage range AC85-265V, the LED series and parallel connection mode of the light board is very important. Try not to use a wide voltage, and can be divided into AC220V and AC110V as much as possible, so as to ensure the reliability of the power supply. Since the current power supply is generally a non-isolated step-down constant current power supply, when the voltage is 110V, the output voltage should not exceed 70V, and the number of series connections should not exceed 23 strings.

When the input voltage is 220V, the output voltage can reach 156V. That is, the number of concatenation does not exceed 45 strings. The number of parallels should not be too much, otherwise the working current will be too large and the power supply will be seriously heated.

There is also a wide voltage scheme, APFC active power compensation is to use L6561 7527 to raise the voltage to 400V, and then step down, which is equivalent to two switching power supplies. This solution is only used under certain conditions.