Is white light of LED street light unsuitable for road lighting?
TEK lighting: now some street lamp units made clear preference for yellow, there are also some experts and institutions declare that Chinese people like the warm white (2700-4000 k), but LED street lamp enterprises feel white light is better. Opinions vary and vary.
Here, it is necessary to review a case was repeatedly mentioned: in 1999, an international company promote metal halide lamp in the domestic , shenzhen many main road, including the shennan avenue, are replaced by white light(6000-6500 k).
The initial effect was not bad, but the situation was not long. There were public complaints after 2000. The complaint reached its peak in 2001 and 2002, reflecting the dimly lit white light and feeling bad. Since then, the main street in shenzhen has gradually changed back to the high sodium lamps with yellow light. And it's happening in other cities as well.
TEK lighting acknowledges the fact, but does not agree that the case has been interpreted to mean that the citizens of shenzhen do not like white light and even Chinese do not like white light. Because there was no public complaints when it was just installed, the complaint came a year later, at the most in two to three years.
According to the data of pavement measurements after the complaints, the luminance decrease of metal halide lamp is very serious, and the light intensity has decreased significantly, and the asphalt pavement illuminance is only about 10Lx.
Therefore, white light is not accepted in road lighting, the reason is not high color temperature, but because of the combination of high color temperature and low light (illumination) degree.
At the beginning of install MH, it is still in the comfort zone and won't feel dim. Unfortunately, luminance decrease is very serious, and a year later, the light is obviously falling, falling into the dark area, and the complaint appears.
Based on the complexity of psychological feelings, there is no scientific investigation and sufficient sample to judge the advantages and disadvantages of white light and yellow light, and not to determine that LED street light is not suitable for road lighting.
In the LED street lighting test, we organized 12 road lighting designers to the field questionnaire, and the results of yellow light, warm white, neutral white and cold white were all three. Although the sample size is limited, it is sufficient to show that different individuals have a taste for different color temperatures and even professional groups.
Therefore, it is impossible to set a preset position on the study of color temperature, only the combination of light and environmental conditions should be studied carefully before the real answer can be obtained. In the big direction, the individual thinks that road lighting may repeat the process of indoor lighting, and white light will be the mainstream direction in the future.
Here, it is necessary to review a case was repeatedly mentioned: in 1999, an international company promote metal halide lamp in the domestic , shenzhen many main road, including the shennan avenue, are replaced by white light(6000-6500 k).
The initial effect was not bad, but the situation was not long. There were public complaints after 2000. The complaint reached its peak in 2001 and 2002, reflecting the dimly lit white light and feeling bad. Since then, the main street in shenzhen has gradually changed back to the high sodium lamps with yellow light. And it's happening in other cities as well.
TEK lighting acknowledges the fact, but does not agree that the case has been interpreted to mean that the citizens of shenzhen do not like white light and even Chinese do not like white light. Because there was no public complaints when it was just installed, the complaint came a year later, at the most in two to three years.
According to the data of pavement measurements after the complaints, the luminance decrease of metal halide lamp is very serious, and the light intensity has decreased significantly, and the asphalt pavement illuminance is only about 10Lx.
Therefore, white light is not accepted in road lighting, the reason is not high color temperature, but because of the combination of high color temperature and low light (illumination) degree.
At the beginning of install MH, it is still in the comfort zone and won't feel dim. Unfortunately, luminance decrease is very serious, and a year later, the light is obviously falling, falling into the dark area, and the complaint appears.
Based on the complexity of psychological feelings, there is no scientific investigation and sufficient sample to judge the advantages and disadvantages of white light and yellow light, and not to determine that LED street light is not suitable for road lighting.
In the LED street lighting test, we organized 12 road lighting designers to the field questionnaire, and the results of yellow light, warm white, neutral white and cold white were all three. Although the sample size is limited, it is sufficient to show that different individuals have a taste for different color temperatures and even professional groups.
Therefore, it is impossible to set a preset position on the study of color temperature, only the combination of light and environmental conditions should be studied carefully before the real answer can be obtained. In the big direction, the individual thinks that road lighting may repeat the process of indoor lighting, and white light will be the mainstream direction in the future.
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