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ATTN: Jason Chung
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Address: Longgang District, Shenzhen City, Guangdong, China

LED Street Lamp Quality Standards

LED lights light principle:

LED (Light Emitting Diode), light-emitting diode, is made of III-Ⅳ compounds, is a solid-state semiconductor devices, it can be directly into the electric light. LED heart is a semiconductor chip, the semiconductor chip consists of three parts, part of the P-type semiconductor, in which the hole inside the dominant position, the other end is the N-type semiconductor. When the current through the wire acting on the wafer, electrons and holes will be pushed to the quantum wells, electrons in the quantum wells with holes combined, and then will be in the form of photon energy, which is the principle of LED light. And the wavelength of light is the color of light, is formed by the formation of P-N knot material.

High-pressure sodium lamp is the use of power, the arc tube between the electrodes at both ends of the arc, due to the high temperature of the arc so that the tube of sodium amalgam heat evaporation into mercury vapor and sodium vapor, cathode electrons in the process of moving to the anode, The atoms of the material, so that the energy generated by ionization or excitation, and then by the excited state to return to the ground state; or from the ionization state into the excited state, and then back to the ground state infinite cycle, this time, LED Street Light the excess energy in the form of optical radiation, It produces light.

LED street lamp is a kind of new lighting method which realizes the lighting demand through the DC low voltage light emitting diode group. It has the characteristics of high brightness and good color rendering. In addition, since the LED street lamp input is low voltage DC, it can be combined with solar energy Up, making the solar LED lights become a way to the future of road lighting.

1, on energy efficiency analysis, comparison

Should be in accordance with the same illumination (brightness) level, close to the lighting quality standards under the premise of both the lighting installation power. High-power lamp (100 ~ 150W) light efficiency of about 80 ~ 1001m / W, and the use of high-power LED (250 ~ 400W) high efficiency, up to 130 ~ 1401m / W, Street lights with 1WLED tube, the light effect are similar, LED Street Light it is appropriate for high-power street lamps and low-power street lights for analysis.

(1) high-power (≥ 250W) lights: high pressure sodium lamp high efficiency, consider the ballast loss, lamp efficiency and track utilization and other three factors, the overall efficiency of 0.55 dollars, the effective light effect of sodium lamp 70 ~ 751m / W; and LED lights effective light effect, the current in the United States is about 621m / W, the best domestic enterprises have reached 56 ~ 581m / W. Therefore, the ancient town of Runjing lights feel that for high-power street lamps, LED Street Light the current energy efficiency than the sodium lamp is lower.

(2) low power (≤ 150W) street light: the effective light efficiency of sodium lamp (included in the comprehensive efficiency of 0.55) is about 45 ~ 551m / W, while the LED is still 56 ~ 581m / W dollars, the LED than the sodium lamp can achieve energy saving 10 % ~ 20%, up to 30%. From the analysis, we can see for the branch of the small power (≤ 150W), LED lights than the sodium lamp can save 10% to 30%, while the high power is still less than the energy efficiency of sodium lamps. Therefore, those generally claimed that LED lights than high-pressure sodium lamp energy-saving, and even energy-saving 50%, 60% and other claims, apparently exaggerated and speculation suspected. We should adhere to the scientific analysis, the principle of seeking truth from facts, LED Street Light or easy to mislead the users and the masses.

LED lights three times the light distribution is in the high-power LED on the basis of the completion of the second light, through a number of LED (unit module) superposition and space arrangement to meet the road lighting average brightness, average illumination and uniformity The request.

Three times with the following ways:

(1) plane with light

LED lights designed with XY-oriented asymmetric rectangular light distribution of the free surface optical components (lens or reflective cup), because the rectangular light distribution in a single LED optical components have been completed, so the entire LED lights only need to LED array On the plate can be.

(2) arc-shaped light distribution

A plurality of LEDs are arranged to form an LED module. The LED on the LED module is optically aligned with an axially symmetric, totally reflective lens or reflector, LED Street Light and the width of the radiation through the lens or reflector is sufficient to cover the width of the road.

(3) multi-fold face with light

LED light has a good direction, in order to obtain a better road light distribution, respectively, the design of each group of LED projection direction is responsible for lighting their respective regions, the more simple way is to use V-shaped surface.

In the design of multi-fold face light distribution, the high power LED of each group in the street lamp is installed on different planes respectively. By adjusting the relative angle of each group, LED Street Light the light output characteristic and the approximate rectangular illumination effect of the street lamp are satisfied to meet the requirements of the road lighting standard Claim.