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LED Street Light Widely Used
Aug 09, 2017

At present, China is creating a resource-conserving, LED Street Light environment-friendly society, the concept of "green lighting" is also gradually popular. LED Street Light With the continuous progress of science and technology, the rapid development of semiconductor materials application technology, small power LED light source has been widely used in landscape lighting, high-power LED lamps are more and more attention to all aspects.

LED (Light emitting diode), light-emitting diode, is made of ⅲ-ⅳ compounds, is a solid-state semiconductor devices, it can directly convert electricity into light. The heart of the LED is a semiconductor chip, the semiconductor chip consists of three parts, part of the P-type semiconductor, in which the hole occupies the dominant position, LED Street Light the other end is N-type semiconductor. When an electric current is acting on the chip through a wire, electrons and holes are pushed into quantum wells, and electrons in the quantum well are combined with the holes, and then the energy is emitted in the form of photons, which is the principle of LED luminescence. LED Street Light The wavelength of light is the color of light, which is determined by the material forming the n knot.

High-pressure sodium lamp is the use of electricity, arc tube electrodes between the two ends of the arc, due to the high temperature effect of the arc of sodium amalgam in the tube evaporated into mercury vapor and sodium vapor, cathode emission of electrons in the Sun pole movement process, LED Street Light an atom impinging on a discharge material, so that it obtains energy to produce ionization or excitation, and then revert from the excited state to the ground state,LED Street Light or from the ionization state to the excitation, then back to the ground zero cycle, at this time, the excess energy in the form of light radiation released, then produced light.

High-Power LED street lamp is a kind of new illumination method which realizes illumination demand through the DC low voltage Light emitting diode group, it has the characteristics of high brightness, LED Street Light good color rendering and so on. In addition, because the input of LED street lamp is low voltage DC, it can combine with solar energy, which makes the solar LED street lamp become a possible way of road lighting in the future.

LED light source luminous efficiency, LED Street Light the current foreign United States, Japan about 75lm/w around, domestic production of LED about 65lm/w around. The luminous efficiency of high pressure sodium light source is about 100lm/w, the luminous flux per W is higher than that of LED 25~35lm/w. The luminous efficiency of 400w high pressure sodium lamp is up to 120lm/w.

LED lamp is a semiconductor diode, LED Street Light its light source theory life is very long (the premise is to meet within the specified temperature range, L70 light attenuation standard), but a lamp's overall life is not simple is the light source life, lamps also include the lens part of the impact. Therefore, the final lamp life should be all the lamp parts in the shortest life parts. When the luminous flux decays to 30%, its lifespan reaches 50,000 hours, LED Street Light while the life of the metal halide lamp is 6,000-12,000 hours, and the life of the high-pressure sodium lamp is 20,000 hours.