What desk lamp is better?

With the rapid development of the times, China is now showing a trend of younger age, and the number of children and adolescents accounts for 53.8%. The academic burden is very heavy now. Every parent doesn't want their children to be nearsighted or nearsighted, and will do everything possible to protect their children's eyesight. Eye protection desk lamp has become the first choice for parents to buy desk lamp. A good desk lamp can effectively relieve eye fatigue and prevent myopia.

The key point is how to choose eye protection desk lamp. There are still many kinds of eye protection lamps on the market, and their functions are also very different, so today I will answer some questions about eye protection lamps for you.

1. Does the eye protection lamp have eye protection effect?

The eye protection desk lamp has the function of eye protection, and it is equipped with an electronic ballast to change alternating current into direct current, thus increasing the frequency to 30-50kHZ. In the process of use, it can realize the frequency flash invisible to human eyes. Moreover, the desk lamp adopts tricolor fluorescent powder to soften the brightness of light, and its light is close to natural light, with adjustable brightness, which will not cause eye fatigue, and the illumination range is wider, which is beneficial to protecting children's eyesight.

2. Which is better, country A or country AA?

Taking the national standard GB/T9473-20 17 "Quality Standard for Reading and Writing Desk Lamps" as the testing standard, it is stipulated that the two standards are national A-level and national AA-level, and the difference lies in the different illuminance. The illuminance of national AA is twice that of national A standard, and national A is the lowest standard, that is, it has reached the passing line. The national AA level is the highest standard and the most eye-protecting level, so it is best to choose the national AA level for eye protection.

3. What are the criteria for choosing eye protection desk lamps?

1. Illuminance:

The luminous flux of visible light received per unit area, in short, is the illuminance and the degree to which the surface of the object is illuminated, and the unit is lux. Within the fan-shaped range of 120 with the center of the circle as the radius of 300mm, the national A-level illumination is above 250Lux; The national AA-level illumination is above 500Lux, and the illumination of desk lamp is preferably 300-750Lux when studying.

2. Lighting uniformity:

The ratio of the maximum value to the minimum value, the uniformity of the 120 sector area with a radius distance of ≤300mm or less from the center of the circle is less than or equal to 3; 120 ≥300mm≤500mm, the uniformity of illumination in the sector area should also be ≤3, which conforms to the national AA standard. The closer the uniformity is to 1, the better.

3. Color rendering index:

The color rendering ability of light to objects is an important index to measure color rendering. The closer the color rendering index is to sunlight, the better, that is, it is close to Ra 100, indicating that the original color of the object is good.

4. Color temperature:

Simply put, it is the color of light, in Kelvin (K). Different color temperatures have different feelings. The lower the color temperature, the warmer it is, giving people a warm feeling; The higher the color temperature, the colder it is, giving people a cool feeling. It is best to keep the color temperature at 4000K during study.

5. Strobe:

The desk lamp is powered by alternating current, and its brightness changes with the periodic change of alternating current. If the frequency is below 100Hz, it will be captured by human eyes, causing headache and eye fatigue. The frequency is above 100Hz, so it will not be seen by human eyes. There is basically no video flash on the desk lamp.

6. Blue light:

It is a blue light source in visible light, and there is blue light on the screens of mobile phones and computers every day. The wavelength of blue light is 400-500nm, and harmful blue light is 400-440nm, which will cause photochemical damage to human retina, leading to macular degeneration, cataract and so on.

4. What desk lamps are suitable for children to read and study?

1, book eye Protection desk lamp pro

Recommended index: ★★★★★★★

Highlights: The only desk lamp that can effectively protect eyes can reduce the risk of myopia by 92% and improve vision health.

Sukebuk is an old-fashioned domestic product with 8 years of optical technology and experience. The basic standard is much higher than the national standard 1 10%. It has a number of optical eye protection technologies, especially the core RRT red eye-catching, which reconstructs the concept of eye protection desk lamp in the past and is the only brand that can protect eyes at present. Forward-looking technology and excellent product quality have also been highly recognized and recommended by "Lilac Doctor", CCTV and industry media.

China Academy of Sciences and many research institutions at home and abroad have found that red light from the sun can effectively improve vision health and prevent vision decline. Many years ago, Suke made an in-depth study on the natural light of the sun, and created "RRT red light eye-catching technology" and "fluorescent lamp-like beads" to eliminate the blue light peak, and at the same time fill the relevant green and yellow light to supplement the beneficial red light needed for children's development, deliver "nutrition" to the eyes, and protect retinal pigment and epithelial cell activity! Help relieve 83% of eye fatigue and reduce the risk of myopia by 92%!

With regard to eye protection desk lamps, many brands and products have been frequently exploded as "products have potential safety hazards", but the brands that have been exploded have rarely improved and are still selling inferior products. The bookkeeper strictly adopts the research and development ideas and quality standards of "medical grade" and "four major quality inspection requirements". It took eight years to carefully build this bookkeeper's eye protection desk lamp Pro, and invited more than 20,000 families to participate in the product testing stage.

Including the basic core parameters, are far beyond the reference standards, but also equipped with a series of functional technologies specially designed for learning with the eyes, such as induction automatic light-on, ghost-free backlight, regular rest and so on.

2. Panasonic patrol desk lamp

Recommended index: ★★★★★

Highlights: There are two versions, which support two-way lighting and can supplement the three-dimensional sense of the whole space.

Panasonic tour guides have a very good lighting and uniformity, and the light sense is also very soft and natural. It is unique in that it has a design that can be illuminated up and down, which can achieve a larger space lighting range and reduce glare ghosts caused by light focusing.

It has a sense of light, and can identify the brightness of ambient light when it is used, so as to optimize the illumination brightness of the desk lamp and reduce eye fatigue caused by the mismatch between ambient light and the light of the desk lamp.

3. NVC purple core desk lamp

Recommended index: ★★★★

Highlight: purple LED chip is used to reduce the blue wave peak and reduce the harm of blue light.

NVC purple core has a unique purple chip, which can reduce blue light well and the illumination has a good performance. The uniformity can reach 2. 1, which meets the national AA standard. NVC purple core also adopts the technology of three-dimensional two-way light transmission, which improves the uniformity of the whole light and reduces the gap between light and dark in the lighting area by passing light up and down.

Built-in intelligent photosensitive function can automatically increase or decrease the brightness according to the ambient light to maintain the comfort of eyes. It can also be adjusted freely in three lighting gears.

4. Philips Tan Xuan desk lamp

Recommended index: ★★★★

Highlights: simple and uncomplicated use, meeting the requirements of national standard AA, and sufficient lighting.

Philips Tan Xuan has good illumination and uniformity, which meets the national AA standard. The surface of Philips Tan Xuan's light source adopts honeycomb anti-glare design, which can avoid glare and promote the softness of light. Through the built-in sensor of the desk lamp, the function of automatically adjusting brightness and automatically turning on the light when sitting can be realized.

Touch functions are all designed in the desk lamp base, and each function has a corresponding function key, which can be quickly adjusted by simple understanding.

5, children's visual treasure VL235B table lamp

Recommended index: ★★★★

Highlight: Double light source design with face ring, bright overall lighting and wide lighting range.

Children's visual treasure VL235B desk lamp adopts double-light source and double-effect eye protection design with surface+ring, and the surface light source light guide plate adopts three-layer diffusion multi-level diffusion technology to improve the central illumination and make the light soft and comfortable; Intelligent photosensitive, which can automatically adjust the brightness to make the overall brightness uniform; Annular diffuser adopts reflective curved surface lighting technology to improve edge illumination, uniform light and delay fatigue; Four lighting modes, automatic switching between reading and office, intimate nightlight mode. There is an LED light on the back of the lamp body, which is convenient for sleeping or getting up at night.