At 6 o’clock in the morning of late winter, under the cover of the thick bed curtain, the bedroom was dark. Just after being awakened by the alarm clock, Ms. Wang turned on the lamp blearily. The bright light stabbed her eyes; Aunt Li has the habit of getting up at night. She is always “woken up” by urination at two or three o’clock in the middle of the night. She gets up and touches the bathroom, turns on the white light, and then lies on the bed, but she can’t sleep any more; Xiao Dong, the “it man”, almost sits in front of the computer during his working hours. Every day when he comes home, he doesn’t turn on the light and only turns on the TV. “Only in a dark environment can people relax,” he said
In the home decoration, the use of lights is indispensable, but modern people blindly pursue the effect of fashion. Crystal lamps, spotlights, downlights, color lights and so on are overused. The night at home is like the day. When people come home after a hard day’s work, they will not only not be able to relax and rest, but also their health may be threatened. It is understood that if you use your eyes too much indoors for a long time, your ciliary muscles will be highly tense, and your lens will be excessively refractive. Using your eyes for a long time will lead to visual fatigue or vision loss. Improper use of light at night for a long time may also lead to dizziness, irritability, even increased blood pressure and palpitations. Professor Zhang shanduan, deputy director of the electric light source Research Institute of Fudan University, stressed that abuse of light sources at night will inhibit the secretion of melatonin or reduce its concentration, disrupt people’s normal physiological rhythm, and cause insomnia, sleep quality decline and other problems. Improper light use has a particularly serious impact on infants, which not only affects the development of vision, but also interferes with the function of the central nervous system of the brain. However, Zhang shanduan told reporters: “at present, there is a consensus at home and abroad on outdoor light pollution, and there are relevant standards to limit the brightness and emission range of lamps and lanterns. For indoor improper light use, some have been regulated by indoor lighting standards, but they are not complete.” When selecting and using lamps, pay attention to the following points:
don’t set the color temperature too high color temperature is the feeling of human eyes on luminaries or white reflectors. It is used to define the color of light in optics. Generally speaking, the color temperature of red is low, the color temperature of blue is high, the color temperature of warm colors is low (such as sunlight in the morning and evening), and the color temperature of cold colors is high (such as sunlight and sky light at noon). It is recommended to use lamps with low color temperature at home, for example, below 3000K (Kelvin). Low color temperature lamps help reduce the inhibition of melatonin, regulate the body’s biological clock, and make people relax.
good color rendering to put it simply, color rendering is the fidelity of an object’s color under light. The light source with high color rendering can restore the color better, and the color we see is closer to the primary color under natural light. If a light source with low color rendering is used, the color you see will be greatly deviated, the things you see will not be realistic, and the things will deviate from the original color, which will easily lead to visual fatigue. The color rendering index of lamps used indoors is required to be above 80. Pay attention to the labels on the light source or lamps when selecting.
control glare This refers to whether the light is dazzling. If it is dazzling, it means that the glare level is high. There is a principle when installing lamps and lanterns at home, that is, try not to see the light source directly during normal activities. If it is an energy-saving lamp, the problem is not big, because its brightness is not too high. LED bulb lamps and straight tube lamps need to be equipped with diffusion covers, and the brightness should be controlled within twice that of energy-saving lamps; Spotlights and downlights should control the light angle, so that the light source can not be easily seen by the eyes. Here’s a trick, that is, when you don’t look at the lamp specifically, you don’t feel dazzling, or you don’t feel dazzling at all.
don’t be too colorful some people like colorful lamps and lanterns, especially in children’s rooms. Colored lamps of various shapes are very popular with children, but they are not good for eyes. Young children especially like to stare at the lamp. Our subjective feeling is that if we look at the lamp for a long time, our eyes will spend, which may be harmful to the development of children’s vision.
you can’t just turn on the desk lamp when doing homework many people like to turn off all lights when watching TV and using the computer, which will cause visual fatigue and damage their eyes. Therefore, turn on the light when watching TV and computer. When doing homework, turn on the desk lamp to make the homework look brighter. In addition to the desk lamp, turn on the lamp above your head to provide background lighting so as not to damage your vision.
turn off some lights or turn down the brightness after 9 p.m some people like more lights and higher brightness at home, but it is recommended to turn off some lights or lower the brightness after 9 p.m. to gradually increase the melatonin concentration in the body, so as not to delay the sleep time and affect deep sleep. When sleeping at night, try not to turn on the light, because the light will enter the retina through the eyelids, inhibit melatonin, and affect the quality of sleep.
babies are good at “borrowing light” for the light source in the baby room, it is necessary to ensure that all light surfaces are low brightness, or let the light shine on the wall, ceiling or other object surfaces and then reflect. At night or at night, if there is no special need, it is better not to turn on the lights in the baby room, but to turn on the lights in other rooms next to it, such as the lights in the bathroom and living room. Leave the door ajar and let in some dim and weak light. If the baby sleeps with its parents, try to turn on a warm night light when it needs a light at night.
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