LED street light fixtures feature white light using phosphors
LED street light fixtures are suitable for high-power LED light sources and are equipped with CE-certified constant current sources. 2. Scope of use: Urban roads, including squares, schools, parks, and residential areas and factories require outdoor lighting.
Features:
A. Use single or integrated high-power LED (30W-200W) as the light source, using imported high-brightness US Puri or Taiwan wafer chip, heat sink Integrated heat dissipation design with luminaire, heat dissipation by housing and air convection.
B. The aluminum die-cast lamp housing can effectively dissipate heat and water.
Street lamp manufacturer C. Adopts a spherical orphan plane design, and uses a single elliptical lens to improve the uniformity of the light source and the utilization of light. The LED lamp can highlight the advantages of energy saving and environmental protection, saving more than 60% compared with the traditional sodium lamp. . . .
4.LED street light lamps have no bad glare and stroboscopic, green and environmentally friendly, free of lead, mercury and other pollution elements.
LED fluorescent lamps use phosphors to achieve white light. There are three main methods, but they are not fully mature, which seriously affects the application of white LEDs in lighting:
The first method is to apply a yellow phosphor that can be excited by blue light on the blue LED chip. The blue light emitted by the chip and the yellow light of the fluorescent lamp emitting street lamp manufacturer complement each other to form white light. Nichia Corporation of Japan monopolizes, and a principle disadvantage of this scheme is that the emission spectrum of Ce3+ ions in the phosphor does not have continuous spectral characteristics, and the color rendering property is poor, which is difficult to meet the requirements of low color temperature illumination, and the luminous efficiency is not high enough. It needs to be improved by developing new high-efficiency phosphors.
The second method is to apply green and red phosphors on the blue LED chip, and the blue light emitted by the chip is combined with the green and red light emitted by the phosphor to obtain white light. The color rendering property is good, but the conversion efficiency of the phosphor used is low, and the efficiency of the street lamp manufacturer, especially the red phosphor, needs to be greatly improved, so the promotion is also slow.
The third method: coating three primary colors or multiple colors of phosphor on a violet or ultraviolet LED chip, using the long-wave ultraviolet light (370nm-380nm) or violet light (380nm- emitted by the chip) 410nm) to excite the phosphor to achieve white light emission, the LED has better color rendering, but there are similar problems with the second method, and the red and green phosphors with higher conversion efficiency are mostly sulfide systems. Such phosphors have poor light-emitting stability and large light decay, so they have not been used in batches.
Yangzhou Langxu Lighting Technology Co., Ltd. is a professional manufacturer of solar street lights, LED street lights, high pole lights, traffic signal poles, traffic sign poles, tiltable poles, landscape lights, garden lights, Manufacturers of inclined street lamps, welcome your inquiry.
