How to buy LED Lamps during "November 11"?

   Is lamps and lanterns the brighter the better?   What kind of light environment is beneficial to eye health?The expert points out that parents, teachers and manufacturers of lights have the responsibility to popularize the knowledge of scientific consumption lamps.   The energy-saving environmental lamps without radiation or strobe should be chosen for the students.

1: Q: How to choose one LED lamp cheaper one or expensive one?                                            A: Do not buy a 5W bulb lamp costs less than 20 yuan.   

      It is reported that consumers in the lamp market during the purchase of LED indoor lights, often see a confusing phenomenon: a well-known brand of 4W LED bulb lamp is priced at 40 yuan, and some unknown brand of 5W LED bulb lamp is only sold for 20 yuan. For these two bulb lamps, which bulb lamp should choose after all?Many consumers told reporters that they tend to choose more bright LED bulb lights.It is understood that because the higher the color temperature, the higher the light efficiency, the brighter the LED indoor lights look.However, in the actual use process, low color temperature looks more comfortable, the corresponding cost is also high.Etheric sunlight, for example, the color temperature of morning and evening sunlight ranges from 3000K to 3500K, which looks relatively mild. At noon, the color temperature of sunlight rises to 4000K to 4500K, which is already quite harsh.Incandescent and fluorescent bulbs, on the other hand, have a color temperature of about 6,200k.

The reporter understands, the bulb that domestic normal manufacturer produces can mark color temperature on packing, commonly used color temperature is 2700k, namely the color temperature of common incandescent lamp, its characteristic is to feel the light is warm, but not bright enough, suit to be used at the head of a bed, wall lamp to wait for local illume;3000k is the color temperature closest to natural light. It belongs to warm light. The light is warm and bright.Above 5000k is white light, belongs to the cool color light, can let the person concentrate, suitable for office, study and other places to use.

Expert said: at present, in the market of lamps and lanterns, general household LED indoor light power is 3 w to 7 w, 5 w around the ball steep light market sales prices generally in 50 yuan, if less than 20 yuan, so the quality of the LED indoor light is sure there is a problem, not only cannot protect the vision, and can greatly shorten the life of a light source.In addition, when consumers buy LED indoor lights, can not only look at the lamp power, because LED lamps are not the brighter the better.

2. Q: blue light hazard of inferior LED lamp? A: don't be cheap, buy a big brand

From incandescent to energy-saving to LED.In recent years, the social attention to energy-saving lamps and lanterns products more than any previous period.To this, a few medical profession personage and expert of electric illuminant point out however, a lot of LED lamps and lanterns exist serious blue ray overflow problem, accumulate over a long period of time will make human eye retina suffers irreversible harm.

Can LED lamp have to eyesight really damage?Zhang shanduan, associate professor and deputy director of the institute of electrical light source of fudan university, told the reporter: "the principle of white LED is that the blue LED chip stimulates the conversion of yellow phosphors into white light.The harm of blue light refers to that if the brightness of the blue light band of 400 ~ 500 nm is too high, the photochemical damage of retina may be caused after the eye looks at the light source for a long time.The damage depends on the amount of blue light the human eye accumulates under the light."

"Leds are no more dangerous than conventional lamps if they are purchased and used properly."The personage inside course of study points out that, at present, more than 3000 domestic production of LED lamps and lanterns, the national standard in our country the lamp and the light of the lamp system of biological safety, to blu-ray harm and quantitative calculation method to make specific provision, and points out that compared with other light source LED lighting products and there is no difference, fall within the scope of exposure convergence limit stipulated by the safe.

Experts say: professor mu tongsheng from the department of photoelectric engineering of zhejiang university said that the international standards for photobiosecurity of blue light have been established according to the intensity of blue light, and the possible harm value of blue light has been set.For example, the light source products without the harm of blue light will be called "zerotype products";The products with less harm of blue light and unable to look at the light source for a long time are called "first-class products". The light source that has bigger blue ray harm is called "second class product". At present, there are basically zero and one types of LED lighting. If there are two types, it is mandatory to mark "eyes cannot stare".Therefore, in the purchase of LED lamps, do not covet cheap, as far as possible to choose and buy large brand products.

3. Q: Quality of eye-protection lamp is uneven? A: Choose and buy one with 3C mark

Desk lamp is the indispensable tool that adult and child study, work.To prevent myopia, choose a good eye lamp for the child, become the problem that many parents consider.According to the reporter understand, at present the product of eye lamp on the market is full of beautiful things in eyes, a lot of products are flabbergasted him is "without strobe", or it is high-tech LED lamp, and the price compares average lamps and lanterns to want a lot of taller.Can these lights protect children's eyes?

The desk lamp area that the author visits a few supermarkets sees, in the desk lamp product of show frame, half is children special "protect an eye lamp".The price of these products is uneven, it is desk lamp likewise, contain "protect an eye" wait for the desk lamp of the word, relative character, than average desk lamp is expensive a few hundred yuan.Some LED "eye protectors" cost even more.

The author observes discovery, the desk lamp that puts on the shelf, did not indicate "protect an eye" the desk lamp of function, the price is from 80 yuan ~300 yuan to differ;And mark "protect an eye" the lamps and lanterns of function, cheapest want 300 yuan, expensive want 900 yuan to control even.Reporters also found that in addition to the price difference, many "eye lamp" products are not related to the "3C" certification mark.

Experts said: "eye lamp" is currently more marketing concept, whether there is "eye protection" effect is not sure, consumers in the purchase process, should pay attention to check the safety certificate and instructions, the best choice has after-sales service of the product, and pay attention to the product's 3C certification mark.

Children room illuminant design has clever move

Research has found that the long-term use of "foot-light" lamps is one of the factors that lead to the high rate of myopia among teenagers in China.If the brightness of lamps and lanterns is much higher than the brightness of the general indoor environment, people will feel dizzy.Visible, the brightness of lamps and lanterns is big not equal to the light is good, too bright can damage retina.How can our children live in a relatively safe light source environment?Here's what the experts have to offer:

1. Different design in different areas.

Children bedroom holds concurrently a variety of functions such as game, study, morpheus, functional area is different, the light requirement is different also;The light intensity and the area of the game area can be slightly larger.The light intensity in the study area can be moderate and concentrated.The light in the sleeping area should be as soft and warm as possible. This will help your child feel safe and sleep well.

2. Avoid unbalanced lighting.

One is too bright and the other is too dark. This is an unbalanced design.So, besides advocate illuminant besides, the illuminant of a few auxiliary type can be set (wait like wall lamp, floor lamp, desk lamp), the different of the different of the position of position of the space that passes light, space, Angle will mediate indoor light difference, with this will alleviate the fatigue of the child eye and unwell.

3. The reflected light should go up.

If want to use indirect reflection light to serve as ambient light, want to notice to let chimney reflect light up as far as possible, do not reflect downward.Because the downward reflection of the light source may let the light direct to the child's eyes, will damage the child's vision.

4. Use spotlights sparingly.

Spotlights, if not used well, can cause mental strain in children.If you want to shine a spotlight on a wall of art (such as a picture frame), avoid creating a bright spot.So, when making lamplight, want to shoot to artwork from flank, the light comes from flank, the bright spot of dazzling won't be reflected directly to the person's eye on.

5. Choose adjustable lighting.

Had better choose the lamps and lanterns that can adjust light and shade, Angle, the light is dimmed a few darker at night, increase the sense of security of the child, help the child to fall asleep as soon as possible.Be sure to turn off the light when your child goes to sleep.Because children who sleep under lights suffer from impaired vision, the rate of myopia is much higher than that of children who fall asleep in the dark.