Learn these points to choose the right eye protection table lamp
Nowadays, merchants generally use the gimmick of eye protection and eye protection desk lamps to promote, but in fact, it may not protect the eyes, and it is easy to cause eye fatigue and vision loss after using it for a long time. Let's take a look at the requirements of a standard eye protection table lamp with the editor, so that you will not be fooled when you buy it.
Strobe
In fact, most light sources will have stroboscopic, but the degree is different. A more accurate name for "no stroboscopic" should be "imperceptible stroboscopic". The national standard requires that the fluctuation depth of the eye protection table lamp is less than 3.2 percent to be qualified, which requires professional instruments to detect.
There is an easy way to test it yourself, turn on the camera of the mobile phone/camera and look at the light source to see if there are lines on the screen (this method is not completely scientific, because it involves different camera imaging components and sampling algorithms, the results will be different. ), but this method can basically be used to judge that the strobed light source has a relatively large stroboscopic flicker, and it is not recommended to purchase and use it.
Color temperature
The color of the light source is often expressed by the concept of color temperature. Different color temperatures give people different feelings. The lower the color temperature, the more red part of the spectrum, which looks like warm yellow light. Cool white light in shades. The standard color temperature is 3800K to 4200K. The color temperature of the eye protection table lamp should not be higher than 4000K. Softer light is less irritating to the eyes.
Illumination
Illuminance refers to the luminous flux of visible light received per unit area. Put the eye protection table lamp on the table to see if the range of illumination is large. If it is only a small area, it is not suitable; you can also look at the light source. The larger the light source surface, the softer and more uniform the light will be. The light source is small and looks dazzling.
shading
The national standard "performance requirements for eye protection desk lamps for reading and writing operations" has made shading requirements for eye protection desk lamps, that is, "the height of the eyes from the reading and writing desktop is 400mm, and the horizontal distance from the center of the light source is 600mm. If you look at the lamp, you should not see it. Reflector inner wall and light source". If the light-shielding property of the lighting product is not good, the light-emitting surface projected to the retina will produce a glare effect and cause visual fatigue.
In addition, choose an LED eye-protecting desk lamp with a lampshade. The optical lampshade can diffuse and scatter the LED light source, and the light emitted is softer and uniform, not dazzling.
When choosing an eye protection desk lamp, it is more secure to choose a reliable big brand as much as possible. Look for the CQC mark of the China Quality Certification Center, and do not choose products with three nos.
