Q:The LED lamp can change the light bulb

LED desk lamp is small current is energy-saving lamp, lamp power current too big, want to use have to change very troublesome, some parts to replace. The LED desk lamp is to protect the eyes and the light bulb is 50 hz frequency of eye fatigue.

Q:Long amount of led desk lamp can plug the power cord with straight?

See what kind of, is that a light, if it is r-c step-down circuit + lead-acid battery, internal voltage regulation and protection circuit, can't turn on the light, turn on the light charging will give lights to burn out, you look for the packing instructions are printed on the color card, flashlight, LED lamp will be printed with similar to turn off the lights and then charging, charging instructions, please do not use when we use the LED rechargeable flashlight, rechargeable lamps, all because of electricity used up, forgot to turn off the lights, on 220 v power directly, burn the majority.

Q:How to maintenance of led desk lamp filled in no electricity

Possible battery charging circuit is broken, seeing you is what buck circuit, if it is a transformer or resistance and capacitance step-down circuit is relatively simple, maintenance is a electronic components, slightly understand electronic knowledge can repair myself. If it is switch power supply is trouble to repair, to professional maintenance technology to repair.

Q:LED rechargeable lamp, can you tell me how long does it take to charge for the first time?

All batteries are theoretically don't need a long time to filling the so-called active. You only need to according to the desk lamp on the manual of packaging and the charging time of charging. And desk lamp basic are marked on the package standard of charging and the longest charging time.

Q:The led bulb loaded on the adjustable light lamp is broken

If don't use without support, mount or will be relatively easy to burn out.

Q:How many watts of LED3 is equal to the ordinary energy-saving lamps

3 w leds is equivalent to 3 w of energy-saving lamps, not so simple than power depends on photosynthetic efficiency, luminous flux and color rendering, the quality of the different products are not the same as the 4 w energy-saving lamps can replace 20 w energy-saving lamps, good product can substitute for 35 w halogen lamp cup LED is also in the same way, the 3 w can also reached the standard of 15 w incandescent lamp, lighting is not suitable for lighting

Q:LED lamp circuit of current more conference appear what problem

Large current and more way to reduce the current. Of the main parameters affecting the service life of the LED is current and temperature, electric current, the greater the corresponding calorific value was greater, so the LED driver must reasonable control current, the other current large whole lamp of photosynthetic efficiency is low.

Q:Led lamp generally not transformer, why also said some led desk lamp radiation levels

There will be no frequency transformers high-frequency transformer (a lot of switch power supply are to be used), and high frequency transformer has radiation. If there is a low frequency transformer (it does not need to high-frequency transformer) but not excessive radiation

Q:The LED lamp is bad for your eyesight?

SMW there are rumours that the article use LED lights, don't have to talk about blue color change, at the same time, the central 10 sets to show detailed CCTV10 why the advantages of LED lights and LED the lamp that shield an eye can best protect vision video because leds can adjust the color temperature, so you can choose from 3200 ~ 3500 k of warm white LED light source color temperature to reduce the visual perception and the differences of the sun

Q:Said online using a mobile phone to see stripe is low, easy to cause fatigue, eye injury, desk lamp, hope you recommend some good reading for a long time, mainly recommended within 100 yuan small desk lamp, of course, you can go home and buy a good

100 yuan less than a good desk lamp, it depends on what you mean "good" means good. If it is also the appearance of the, on the Internet that a lot, because of differences in personal vision, this is bad recommendation. But if you want to good performance, good quality, it is estimated that 100 yuan can not be done. As far as I know, a bit better to import medium power LED lamp bead a nearly a dollar money, if calculate by 10 w lamp bead costs 20 yuan, not to mention the adjustable light, color temperature (this is the "good" table lamp) the most important indicators, the cost of the other, "good" lamps on the market at least 300 yuan. Have time to learn about the "account name", it should be on the market the most valuable "good" table lamp.