cutting edge
With the increasing application of LEDs (light-emitting diodes) in the field of lighting, LEDs have quickly entered the lighting market and gradually replaced traditional light sources. Many lighting manufacturers are harvesting the joy of LED energy efficiency while not forgetting the LEDs. The illuminating properties and chromaticity improvements were studied in depth.
Due to the spatial luminescence characteristics that are different from those of traditional illumination sources, the measurement methods such as Luminous Flux, Luminous Intensity and Efficacy, which were originally applicable to traditional light sources, cannot meet the requirements for LED lighting products. quality control. In response to the requirements for color measurement of LED lighting products, the drafters and associations of major standards at home and abroad have added requirements for LED color, correlated color temperature (CCT), and color rendering index (CRI). Enter the column. For example, the "Colorimetric Index of Solid State Lighting Products" proposed by the National Standard Lighting Group was used as an important reference for evaluating the color of lamps in the ENERGY STAR project. Several groups in Japan dedicated to LED research also proposed "White LED metering for lighting". The General Principles of the Method has clear guidance on the development of white LEDs in Japan. There are no relevant national standards for the detection of luminosity and chromaticity of LED lighting fixtures in China, but the introduction of some local standards provides LED lighting manufacturers with important reference in color quality control and research and development.
Due to the promotion of energy-saving and environmentally-friendly LED lighting by the Chinese government, the implementation of the ten-city plan, the evaluation projects of LED street lamps have been carried out successively, and the LED streetlight projects in Shenzhen and Shanghai have also paid great attention to light color detection. .
At present, for the entire LED lamp or LED light bulb with large light-emitting area, the detection of luminosity and chromaticity is completely different from that of single LED. LED lamps (such as LED street lamps and LED tubes) have larger area and strong directionality. In the lighting environment, we are more concerned about the illumination, uniformity, brightness of the lamp or lamp, the temperature and color changes of the lamp after lighting and the influence of the lamp on the human eye. Therefore, the illuminometer is measured with a illuminometer or a brightness meter. Chromaticity and luminosity are commonly used methods.
Compared with traditional lighting fixtures, the differences in the luminous characteristics of LED lamps are mainly as follows:
1) The LED panel consists of many single LEDs. Different consistency between different particles may lead to differences in brightness and color temperature.
2) Even a single LED of the same batch will produce chromaticity and main wavelength drift, resulting in uneven chromaticity and illuminance of the overall luminaire;
3) LED illumination has a strong directionality. Generally, LED illumination is bright in the middle and dark on both sides; the optical design of the luminaire is crucial;
4) After the LED lamp is lit, the color and brightness will change with the increase of temperature, so with the passage of time, the LED lamp will have color temperature shift, brightness and color temperature unevenness.
In the laboratory, measurements can usually be made with an integrating sphere or a distributed photometer, but this is not a substitute for field measurements after the fixture is installed in the field. On-site field measurements require a compact, portable, and accurate measurement of illuminance, brightness, and color temperature.
In the LED Street Light Test Contest held by Shanghai Semiconductor Lighting Engineering Technology Research Center, the color temperature illuminance meter CL-200 produced by Konica Minolta has fulfilled the above requirements and played an important role! Provide accurate and efficient measurement data for on-site field measurements!
High-mast lights are quite different in nature from more typical street or roadway lights. High-mast fixtures are regularly mounted at 60 ft to more than 100 ft above ground level and occasionally as high as 250 ft. Normal Street Lights are typically mounted at heights lower than 60 ft, and many are in the 30-ft range.
The applications for high-mast lights include installations at transportation terminals, other large, outdoor maintenance or storage yards, and specialty roadway applications. The aforementioned freeway interchange installations are probably the most common roadway application, although you will find some high-mast lights within municipalities in busy areas
Highway High Mast Light,Galvanized Highway High Mast Light,Highway High Mast Lighting Pole,Highway Lighting Pole
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