Date:2022-04-25
The LED street light with special light shape design is applied to the street light fixture, which can offset the lighting angle of the light fixture and improve the lighting utilization rate of the roadside; light spot, so that there will be no shadow between adjacent light spots, and a bright and uniform light strip can be formed on the road surface, so it is more in line with the current lighting design of traffic roads, and it is sufficient to meet the needs of increasing the height of the light pole. Wide illumination range, but also improve the lighting efficiency of lamps and lanterns, reduce the lighting power density of the road, so as to truly achieve energy saving and green environmental protection. High-power LED street lamps are used for road lighting. The following is to share with you LED landscape street lamps and traditional high voltage Compared with sodium lamps, it has unparalleled advantages:
1. The light-emitting mechanism is different. Since the LED street light is a semiconductor device, its effective life can reach 50,000 hours (that is, after 50,000 hours, the light decay is less than 30%), which is much higher than that of sodium lamps and metal halide lamps (their lifespans are approximately at 12000-15000 hours).
2. Since the LED street light is a semiconductor material without filament and other additional materials, it has good shock resistance.
3. The color rendering index of LED street light source lighting can reach more than 80, which is relatively close to natural light. In this case, it is easier for the human eye to distinguish things, which is conducive to driving safety; while the color rendering index of high-pressure sodium lamps is only 20-30.
4. Traditional gas discharge lamps such as high-pressure sodium lamps have a preheating process when starting, which wastes energy and is not conducive to intelligent control; LED street lamps have essential differences in light sources, and there is no "start-up time" problem. , it can work normally immediately after power-on, and can realize intelligent energy-saving control very conveniently.
5. Since the traditional street light sources use the mechanism of mercury vapor to emit light, the disposal of waste light sources is also an urgent problem to be solved in the world. At the same time, the light-emitting mechanism of traditional light sources determines that it will emit harmful ultraviolet rays. The LED street light source is solid-state lighting, without harmful substances such as mercury and other elements, and does not emit ultraviolet rays. Therefore, it is an environmentally friendly light source.
6. In the optical system, the traditional street light source is omnidirectional, half of the light needs to be reflected by the reflector, and the reflector needs to absorb part of the light, so the light loss is relatively large. Since LED street lights emit light in one direction, the utilization of light is higher than that of traditional street lights.
7. The light distribution curve of traditional street lights is determined by the reflector, so it has certain limitations, while the LED street light source is a distributed light source, which can make the lamp light source an ideal bat-wing shape through the design of each electric light source. , By reasonably controlling the distribution of light, the light spot on the road is rectangular, and within the effective illumination range, a higher uniformity of illumination can be obtained.
8. More perfect automatic control (optional): Different brightness can be set according to the needs of different time periods, which can further improve the effect of energy saving. For example, it is 200W when the light is on at 7 o'clock in the evening, and when there are few people at 12 o'clock in the middle of the night, the brightness is automatically adjusted to 100W, which can also save 60W of electricity.
In the current TD lighting design, the lamp distance is generally 3 times the lamp height, and the lamp height is generally equal to the road width of the road. According to the geometric triangle relationship, it can be calculated that the light distribution angle of the lighting fixture should be about 140 degrees in the C0/180 direction. , the direction of C90/270 is about 80 degrees. In the past 100 years, the lighting source has gone through three important stages: incandescent lamps, fluorescent lamps, high-intensity discharge lamps (HID), and now it has broad development prospects in the lighting industry. LED street light sources are called fourth-generation light sources. As an emerging light source, LED street light has long life, high luminous efficiency, low power consumption, short start-up time, high color rendering index, low working temperature, firm structure, not afraid of vibration, good directionality, low working voltage, no ultraviolet Radiation, light weight and other notable features, is the world's most promising new generation of light sources. Moreover, the LED street light source can realize mercury-free production, which is also of great significance to environmental protection. Solid-state lighting using semiconductor LED street lamps as light sources will gradually replace traditional lighting and enter various application fields.
At present, lighting consumption accounts for about 20% of the total power consumption, and greatly reducing lighting power consumption is an important way to save energy. LED street lights are attracting the world's attention with their advantages in employment. The United States, Japan and other countries and Taiwan have predicted the lighting efficiency of LED street lamps. 55% of incandescent lamps and fluorescent lamps in the United States are replaced by LED street lamps, which can save 35 billion US dollars in electricity bills and 755 million tons of carbon dioxide emissions every year. Replacing 100% of incandescent lamps in Japan with LED street lamps can reduce the power generation of 1-2 nuclear power plants and save more than 1 billion liters of crude oil consumption every year. 25% of incandescent lamps and 100% of fluorescent lamps in Taiwan are replaced by LED street lamps, which can save 11 billion kWh of electricity every year. LED street lighting will also form a huge industrial market of 50 billion US dollars.
