Q:The service life of LED lamps and lanterns is true?

In theory LED (single light emitting diode) life can reach 100000 hours. But after assemble into lamps and lanterns, also related to the life of the other electronic components. That is the life of the LED lamps and lanterns of less than 100000 hours might fail, is not necessarily the LED itself, it is possible that the power of the chip, electrolytic capacitor and other components out first. And now many LED manufacturers, the quality is good and bad are intermingled.

Q:How many watts of 10 square meters of the bedroom with led bulbs Warm white or white

10 square meters room are you in a light bulb or multiple light bulb? If a light bulb base lighting 9 w, 7 w must be bright enough. Since this is the bedroom must have table lamps, bedside lamp and so on as auxiliary. Tmall ef led bulb is good, 9 wled bulb is equivalent to 20 w energy-saving lamp brightness

Q:So only the halogen lamp, but is low voltage halogen lamp, need a rectifier, and halogen lamp itself temperature is high, pay attention to the heat dissipation, color rendering index selected 90-100, color WenXuan 2700 k, the best for you.

Whether the welding is wrong or high temperature component breakdown welding time is too long to make? So you can skip the touch element directly using the switch on and off, of course, can also according to component model and buy a change.

Q:Pupils to do homework with good desk lamp is yellow light or white light is good

Desk lamp is good, eyes comfortable is the most important. Actually now the LED for the eyes, is really bright flashing eyes, but in the long run really uncomfortable. Old lamp luminous tube flashing LED lights, dazzling, entanglements...

Q:How to choose the night reading reading lamp

Not use the desk lamp of learning to read, 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.

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

To see: from the perspective of electronic LED desk lamp, due to the light source is LED, LED is a dc light-emitting devices, theoretically to the light, the previous generations of light source with us to the light, the traditional light source such as energy-saving lamps, metal halide lamp, incandescent lamp is communication, will follow the civil power to change the frequency of the input current, so the frequency of communication wave makes the traditional light source will appear in the stroboscope, long-term study working in this kind of light source under the eyes hurt. Use LED lamp, want to see you understand not understand, not all leds are no stroboscopic, if is to use the desk lamp of rechargeable batteries, light-emitting panel does not directly see each LED lamp bead, no dazzle light is that it can until the protection for your eyes, please note that must choose surface is illuminated.

Q:The led lamp low-grade why current sound

You couldn't hear the sound of the single. Current should be the current instability caused by electric magnetic vibration. High-grade didn't work in a very stable power supply should be no broken (continuous waveform, basic), when low, the power output is lighter, and load lighter, leading to power cannot be stable and continuous work, appear discontinuous phenomenon. When the pulsation frequency into the region of the human ear can identify when they heard the sound. In general should be the power source design is not perfect, if you want to change, if you have a basic knowledge, from the perspective of the feedback loop.

Q:Do leds have ultraviolet radiation

No radiation, do not use LED lights, now we'll use the TCP bullying, the effect is good.

Q:Children lamp good choice led lamp is better

Can, LED by natural white light bead (osram), tube made of three primary colors. Starting from protecting eyesight, try not to read for a long time, should have proper rest, look at the distance, eyes

Q:How to repair the led rechargeable small desk lamp

The cause of the damage may have three, the first wire solder joints from or switch contact bad, you carefully check each except; The second is lead-acid battery damage can't charge; The third line fault is charging, the charger for capacitance, rectifier diode, resistor, the most easily broken is the capacitance, then inspect diode. If you didn't have electrical knowledge, please do not repair, in order to avoid dangerous.