led street light fixture Energy efficiency and lighting performance analysis
The energy efficiency and lighting performance of led street light fixtures are important indicators to measure the quality of street lights. This paper will analyze the energy efficiency and lighting performance of led street light fixture, in order to provide some help for the design and use of street lights.
led street light fixture for energy efficiency
led street light fixture offers significant energy efficiency advantages over traditional street lights. The energy efficiency of led street light fixture refers to the efficiency of its ability to convert electrical energy into light energy, that is, the ratio of the luminous flux of the street light to the input electrical power. The high energy efficiency of the led street light fixture is mainly due to its use of semiconductor optics. Compared with traditional street lights, led street light fixtures do not generate a lot of heat when they glow, so their energy utilization is higher.
1. Power factor
Power factor is a comprehensive index to measure the electrical properties of electrical appliances, which directly affects the utilization efficiency of power grid. The power factor of led street light fixture is generally greater than or equal to 0.9, which is higher than the standard value of traditional street lights. led street light fixture has a high power factor, which means that it has less impact on the grid and can reduce energy waste.
2. Overall energy efficiency
The overall energy efficiency is an important energy efficiency index of street lamps, which describes the ratio of street lamp power to optical power. The overall energy efficiency of led street light fixtures is higher, generally more than 85%, while the overall energy efficiency of traditional street lights is often less than 60%. The overall energy efficiency of the led street light fixture means that it can better utilize the input power and reduce energy waste.
3. Luminous efficiency
Luminous efficiency refers to the ratio of luminous flux to the electric power of the light source. The luminous efficiency of LED light source is generally more than 100lm/W, which is more than twice that of traditional street lamps. High luminous efficiency can reduce the energy consumption of street lamps and extend their life.
4. Color temperature color index
The color temperature and color index of the led street light fixture also have a certain impact on its energy efficiency. Color temperature is an important parameter to define the color quality of light source. The higher the value of color temperature, the yellow tone of light color; The lower the value, the blue color appears. led street light fixtures generally use cold white or white light with a color temperature between 5000K and 7000K.
The color index refers to the ability of the light source to render the color of the object truly. The color index of led street light fixture is above 80, which is higher than the standard value of traditional street lights.
led street light Lighting performance of the fixture
The lighting performance of a fixture refers to its ability to illuminate the road, including light source brightness, lighting uniformity, color uniformity, illuminance, beam control, and so on.
1. Light source brightness
light source brightness is an important parameter of led street light fixture, and its unit is cd/m2. Under normal circumstances, the brightness of led street light fixture needs to reach more than 500cd/m2. High light source brightness can improve the brightness of street lighting, thus maintaining the safety of the road.
2. Lighting uniformity
Lighting uniformity refers to the uniformity of the distribution of lighting light on the road surface. led street light fixtures have a lighting uniformity of 0.7 or above, which means that the lighting on the road is very even. High lighting uniformity can reduce the visual fatigue of drivers at night and improve road safety.
3. Color uniformity
Color uniformity refers to the degree to which the color of the led street light fixture changes during the lighting process. When the color uniformity is 0.5 or above, it means that the color of the led street light fixture changes little during the lighting process, and the color of the road surface is more uniform, which can improve the visual comfort of people.
4. Illumination
Illuminance refers to the intensity of illumination of lighting light per unit area, and the unit is lux. The illumination of led street light fixture is designed according to the lighting requirements of different sections of the fixture. For example, the illumination required by the main road is relatively high, generally 50-80 lux; The illumination requirement of nearby roads is relatively low, generally 30-40 lux.
5. Beam control
led street light fixtures need to control the direction and range of light beams to adapt to different roads and environments. Some roads require local lighting, while others require global lighting. Changes in the Angle of the lamp holder can affect the state and illumination of the light source, so the light source needs to be able to adjust according to the needs of the section.
Comprehensive energy efficiency evaluation of led street light fixture
The comprehensive energy efficiency evaluation of led street light fixture is an evaluation method that considers energy efficiency and lighting performance at the same time, which can reflect the strength of the comprehensive performance of street lights. Manufacturers can manufacture and design led street light fixtures according to this evaluation standard to ensure that street lights have good energy efficiency and lighting performance. Comprehensive evaluation criteria can be considered from the following aspects:
1. Energy consumption
led street light fixture is more energy efficient than traditional street lights, and its overall energy efficiency is high. Producers can save energy by reducing the power of led street light fixtures.
2. Lighting effect
led street light fixture has good lighting effect to meet the lighting needs of different roads and environments.
3. Longevity
led street light fixtures last longer than traditional street lights because they do not generate a lot of heat during the process of lighting. Manufacturers can design and manufacture according to the service life of led street light fixtures.
4. Maintenance costs
led street light fixtures are relatively inexpensive to maintain because they last longer than traditional street lights, reducing the number of street lamp changes. Manufacturers should improve the market competitiveness of led street light fixture by reducing maintenance costs.
5. Environmental protection
led street light fixture is not only easy to use, but also environmentally friendly. The use of led street light fixtures can reduce harmful gas emissions and energy waste. Manufacturers should develop more environmentally friendly LED lamps to reduce environmental pollution.
conclusion
The energy efficiency and lighting performance of led street light fixtures are important indicators in the design and manufacturing of street lights. In this paper, the energy efficiency and lighting performance of led street light fixture are introduced in detail, and the aspects of power factor, overall energy efficiency, luminous efficiency, light source brightness, lighting uniformity, color uniformity, illuminance and beam control are expounded in detail. Manufacturers can improve their market competitiveness and environmental awareness by improving the energy efficiency and lighting performance of led street light fixtures.
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