Le hope lighting: LED for desk lamp?

Questions about the LED will not be appropriate for desk lamp, a lot of people consulted we hope lighting. Root has been lighting university because of my business, so a lot of people for the children's vision health directly to ask, as I often get from the market not learning to read with the desk lamp of desk lamp, from the point of view of energy saving, LED certainly didn't have to say, but if it is for a long time to read the desk lamp of learning and choice, from the comprehensive health lighting index evaluation, if it were not made to order, if you want to buy the perfect, it had to spend many time and money! As each light source after the revolution, the older generation of light source products because of some outstanding parameters but not completely eliminated, it seems, LED desk lamp light source as won't win all the LED light source.

the LED desk lamp in the market, but the quality is uneven. Is a common problem, because many of these lamps use small power LED as light source, the total power is not enough, not enough illuminance. Is it to use eye sanitation, depends on its use function. If the head of a bed lamp, small night light, the intensity of illumination requirement is not high, influence may not. But if as a reading lamp, inadequate illumination can accelerate the visual fatigue, is not conducive to protecting eyesight.

second, most of the LED lamp USES the white LED, its principle is coated with phosphor powder on blue chip, chip of the blue light stimulate phosphor issued a yellow green, yellow, green and blue light in the synthesis of white LED, because of its lack of red component, so the color temperature on the high side, some far exceeds the indoor illume appropriate color temperature range. Blue LED spectrum in desk lamp, of course, when close to use is also important to guard against the harm of eyes!

in addition, due to the LED light source is small in size, high brightness, glare prevention requirements for LED lamp. If not carefully choose the light Angle, take the grille, anti-dazzle measures such as lens, and may produce direct glare, produce dazzling sense not only, also can reduce visual function, is not conducive to reading.

I choose study desk lamp mainly refer to the following article, whether to choose LED light source, meet the following standards, the more light, the more I think is a good desk lamp

1, the national certification requirements study desk lamp must through the national compulsory 3 c certification, and in the period of validity;

2, 3200 - warm white light source color temperature 3400 k, tell from visual physiology, visual physiology need warm white light source is the most accord with human eyes;

3, intuitive desk lamp light not direct or reflected eyes, strictly eliminate eye. Simple test methods as follows eyes from reading and writing the desktop height 400 mm, horizontal distance is 600 mm away from the centre of desk lamp light source, should be no direct or refraction of light in desk lamp shade;

4, lamp light intensity detection light source center distance, speaking, reading and writing the desktop height light in 750-400 mm 1000 Lx for best visual light environment;

5, clarity, and color reducibility of simple test stretched out his hands, palms up, under the lamp light 30 centimeters, such as the observed palm lines clear, ruddy palm side finger shows good light color clear, color reducibility; Whereas fuzzy grey, color dark yellow, the desk lamp light is bad. Color rendering index, the desk lamp of Ra in more than 90 resolution is much higher than the market more than 95% share of ordinary color lamp.

6, selection of light source power some data that LED desk lamp and 25 40-watt incandescent lamp brightness is the most suitable, is actually a misnomer. After the measured light source center distance, speaking, reading and writing the desktop height 400 mm, 25 watt incandescent light only 220 lx, 40-watt incandescent light has only 350 lx. Even reduce the height to 300 mm, 25 watt incandescent light has only 330 Lx, 40-watt incandescent lamp is 550 Lx, reach the best visual light environment minimum standards for 750 Lx.

7, study desk lamp should have a certain height, the lamplight illuminate surface large, uniform illumination, 40 centimeters from desktop light should not be less than 750 Lx. Lamp holder also should have a certain length, easy to stretch contraction, suitable for computer operation, drawing, calligraphy, learn to play the piano multipurpose use.

the fact is, want to find in the market to meet the requirements of all the LED desk lamp is a bit difficult. So, many customers can only spend more than a hair of electricity a day, 3200 - Around 3400 k hd halogen professional reading lamps to meet the requirements of optical parameters and eye health.

visual lighting environment is very important, family, speaking, reading and writing assignments at home to read and write operations is one of the most important learning visual lighting environment, specifically is to learn the quality of the lamp quality. Learning is a great variety of lamps on the market, there is the lamp that shield an eye, energy-saving lamps, incandescent lamp and LED lamp, etc. Discriminant learning quality of the quality of the lamp, if the light color of white, or light color dim, dazzling the desk lamp of illumination is not standard, are unfavorable for family learning source, because then there will be a bad influence on the vision of development.

looking forward to more high color, warm white, high photosynthetic efficiency, professional LED reading lamps to the market price is moderate, provide clear environmental protection for everybody to learn visual lighting environment, alleviate eye fatigue, ease ciliary muscle convulsion, help protect everyone's eyesight and healthy development.

happy hope lighting is willing to continue to build professional service platform for healthy lighting career contribute their strength!

coordinating editor li jie

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