Q:LED the desk lamp that shield an eye to choose good warm light or white light is good?

There is no white or warm white light, white light (more than 5000 k) bright point, feel good, as the object dyeing, less suitable for things looked fine, warm Bai Guangguang color yellow (below 3500 k), similar to the incandescent light, give a person with sweet feeling, suitable for one set his mind at to do something, but there are certain dyeing effect, also need not too extreme, actually can buy demitint between 4000-4500 k, with only a little yellow not had to take care of?

Q:Card lamp, LED desk lamp can take a plane

Card lamp, LED desk lamp can take on the plane Articles carried by plane Total on domestic flights, each person can carry no more than one litre of liquid items, and shall open a bottle of check, certainly can carry. Beyond the parts must be shipped. Alcohol items must be checked.

Q:How many good study led desk lamp

LED lamp general 6/7 w is very bright, too light is bad for your eyes, Color temperature 4000-4000 about the most appropriate.

Q:The advantages and disadvantages of LED the desk lamp that shield an eye

8) adapter generally smaller than LED lights, life is short, the transformer is more easily LED the desk lamp that shield an eye main advantages as follows: (1) environmental: no pollution, no ultraviolet, infrared and thermal radiation; (2) low energy design, 150 hours of electricity once, desk lamp in the case of provide sufficient lighting, power as small as possible. Use the light source of semiconductor technology production has a very high photoelectric conversion efficiency, allows you to provide electricity, can maximum limit into light. Dc power supply, which can effectively eliminate the extra electromagnetic loss, further reducing the overall energy consumption, so the power is less than 7.5 w (3) long life light source, 10 years don't have to change the bulb, is 100 times as ordinary light bulbs

Q:Somehow, the light is not bright, charging for a long time or not. Why can't the lamp charging while use?

Possible reasons: 1, the LED is broken; 2, the damage of battery (this kind of desk lamp battery most poor quality). Light cannot be used when charging, so kind of desk lamp charging voltage is higher, will burn out the LED!

Q:The led lamp charging more than 24 hours have what dangerous?????

1, the desk lamp of authentic qualified, the battery charging protection circuit for battery will not overcharge, adequate electricity stopped. 2, LED desk lamp is with LED (Light Emitting Diode) the desk lamp of the light-emitting Diode as Light source, LED is a solid-state semiconductor devices, it can be directly put DianZhuan into Light. Advantage is the light source direction is good, green environmental protection, long service life.

Q:How about the LED the lamp that shield an eye, ok

Of course there are good there, than fluorescent lamp is the biggest advantage of no stroboscopic. Buy should pay attention to look at the LED parameters: the first is the color rendering index Ra is more than 85, reduction of color ability. A second look at the desktop illumination, 500-800 Lux, don't be too bright, easy to produce visual fatigue. Third simulation under the child's reading position look have uncomfortable glare. About 4 color WenXuan 4000 k. I hope it can help you!

Q:The led lamp low-grade why current sound

The 12 v power supply meet the led light have the cause of the current sound is due to your power supply is provided by the 50 hz ac, and 50 hz transformers, and loose core. If it is a high frequency switching power supply, or dc power supply, is listening to less than 50 hz hum.

Q:Do leds have ultraviolet radiation

LED is characterized by single band, the wavelengths are generally above is 390 nm, uv to less than 380 nm, so there is no uv components

Q:The principle of LED the desk lamp that shield an eye

Such competitive incentive LED manufacturers to further expand their product type, and actively seek the LED application field has obvious competitive advantage. After that the LED has applied to text dot matrix display, background light grid and the map array. Digital display the size and complexity of the growing, from 2 digits to three or even four, from section 7 of figures to display complex words and design combination of 14 or 16 segment array. To provide intelligent lattice LED display manufacturers started in 1980. The advances in technology have made the LED can be used in outdoor sports information release and car central high stop lights (CHMSL) equipment installation. Highlight blue LED to the invention of the realization of image advertising display screen, the screen can display image, full-motion video image. The emergence of blue leds can make people use backward transformation of phosphorescent materials from high-energy blu-ray partially converted into other colors. Now only use LED light source can be completely cover all saturated color of CIE chromaticity curve, and all sorts of color of LED and the organic integration of phosphorus can almost any color without any restrictions. In terms of reliability, the half-life of the LED (that is, the light output was reduced to half the time of the initial value) is about 10000 to 10000 hours. Instead, small type indicating the half-life of incandescent lamp (half the half-life of here refers to the number of lamp failure time) typical values is 100000 to thousands of hours, depending on the light of the rated current.