Everyone is used to working and living under the light, but do you know that there are invisible "killers" in these lights? On June 21, the Nanjing Consumers Association released a survey report on the quality of residential lighting. The reporter learned that the association conducted a sample survey of 50 families in Nanjing, and the results showed that all household lighting had problems. Some families have dim lighting, and some family lights do not display colors properly. The most serious is that some lights have too high color temperature, which affects sleep and interferes with the biological clock.
Overview
Most Nanjing people use LED lights at home
In order to investigate the lighting environment of Nanjing family homes, the Nanjing Consumers Association has surveyed 50 Nanjing residents' families, which are located in 8 districts of Gulou, Xuanwu, Qinhuai, Jianye, Jiangning, Qixia, Pukou and Yuhuatai. It will not be equal to 13 years. After the sample is selected, the staff of the National Light Industrial Electric Light Source Material Quality Supervision and Inspection Center carries the instrument to the site for testing.
Modern Express reporter learned that LED lighting has become the main source of illumination for Nanjing people. There are 21 households using LED light sources, 18 households using fluorescent lamps and incandescent lamps, and 11 households using LED lights and fluorescent lamps. Incandescent lamp.
light
Room different lighting requirements are different than half of the family bedroom lights have problems
The lighting is not bright enough, it is one of the important indicators of this inspection. The lights in the house are too dark. If you can't see things, it will affect your vision. The lights are too bright and irritating to your eyes.
Yang Lan, deputy director of the Consumer Guidance Department of the Nanjing Consumers Association, said that they found that some people feel groggy at home and have no spirits, which may be related to the darkness of the lights.
Depending on the functionality of the room, the brightness of the bedroom, living room, kitchen, bathroom, dining room, and bedroom of the old apartment should vary. Among them, the lighting required by the elderly apartment is the brightest, and the illumination requirements of the normal family bedroom are relatively low. Because the elderly have decreased vision, they need more light.
The test results are surprising. The inspectors detected a total of 318 rooms in 50 households, with an overall compliance rate of less than half. Among them, the bedroom has the most problems, and the compliance rate is only 46%, not too bright or too dark. Some of them are finely decorated rooms, and all rooms have the same illumination, no distinction.
For example, a well-decorated room in a property in Jiangning, the other indicators of the selected LED lights meet the requirements, but the illumination is far below the standard requirements. Yang Wei said that the main reason is that in order to reduce costs when the developers choose lamps, in the living room, bedroom, dining room, kitchen and other areas with different lighting requirements, the same low-power lamps are used. Dark, does not meet the standard requirements.
Color development
Super 40% room lighting is weird and can't distinguish object color
Judging the quality of the light depends on whether the color of the object can be displayed normally under the light. For example, if a family uses yellow or red lights for a long time, there is no way to distinguish the color of the home, which will affect visual effects and health over time.
Of the 318 rooms, over 40% were not able to develop color. Among them, the living room lighting compliance rate is relatively highest, at 66%. The bedroom has the lowest rate of lighting, which is 53.2%.
Huang Ruxi, executive deputy director of the National Light Industry Electric Light Source Materials Quality Supervision and Inspection Center, said that the national standard requires a light color rendering index of not less than 80. "In the current common lighting, the spectrum of the incandescent lamp is closest to the sunlight, which is more in line with the true color we see under the sunlight. The LED lamp has a poor color rendering due to the large amount of blue light and lack of red. Advances in technology, now it is possible to improve the color rendering index through technical means." He said, but because of the higher cost, there are still LED color rendering indexes on the market less than 80.
Color temperature
Bathroom color temperature compliance rate is only 17.2%
What is color temperature? Huang Ruxi introduced that low color temperature is the warm light we usually say, with more red components and less blue components. On the contrary, the blue color of the cool color, the color temperature is relatively high. According to the national standard, the color temperature should not be higher than 4000K in the long-term work or staying room. The high color temperature will affect the comfort and may affect the eyesight health of people. In this test, the color temperature compliance rate of 318 rooms was only 37.7%. The most serious problem was the bathroom, and the compliance rate was only 17.2%.
"People use light at different times of the day, and it is ideal to comply with the laws of nature. But now the LED lights on the market are generally high in color temperature. Long-term use will interfere with the human body clock, and may also affect sleep, causing the biological clock to be disordered." He said that some residents in the survey reported that they felt uncomfortable after using the new LED lights and did not know what the reason was. After testing, the use of high color temperature products, and the color temperature value has exceeded the upper limit of normal lighting products.
Suggest
Color temperature is lower than 4000K
Color rendering index greater than 80
“In this inspection survey, we found that the overall lighting quality of residential buildings in Nanjing is not high, and none of the households tested have met the requirements of the testing program.†Huang Ruxi said that the color temperature problem is the most in all indicators. Serious, followed by illuminance, the rate of compliance is less than half. The quality of such lighting has affected the quality of life and health of residents.
The reason why the color temperature problem is the most serious, Huang Ruxi said, this is because the high color temperature of the light is strong to the eyes and therefore bright, giving the illusion of good lighting. The survey also found that most residents have no concept of color temperature, but only purchase and use lighting products based on feelings and business introduction. In this regard, Huang Ruxi suggested that when selecting LED home lighting products, it is necessary to select products with a color temperature of not more than 4000K and a color rendering index Ra of not less than 80. “These indicators are marked on the product packaging and can also be asked by the seller.â€
Pick light according to the size of the room
The old man’s room is bright
Different rooms have different lighting requirements. How do ordinary people choose? Huang Ruxi provides a small trick: you can calculate how much power you want to buy based on the room area. “In general, according to the requirements of 7W per square meter of architectural lighting design standards, you can calculate according to the area of ​​each room.†He reminded to pay attention to the maximum power that the lamps bear.
In addition, the room for the elderly can be calculated from 9W to 10W per square meter; the study can be configured at 11W per square meter. "Because these two rooms have higher requirements for lighting." Huang Ruxi introduced that in the survey, some families have low room illumination, which will cause the elderly to see things, seriously affecting the quality of life and safety of the elderly. "We call on everyone to give the old man a bright space."
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