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

It seems is the switching power supply, circuit board above and have a look. You understand the welding and the multimeter test? If you don't send repair shop

Q:Charging forgot to turn off the switch, directly inserted, and then not bright,, but the charge will bright lights.. Bulb burned out or what? Can you take?

Now small home appliance products, such as LED lamp manufacturer in order to save costs, the internal circuit is very simple, direct is the way of resistance capacitance charging circuit, and probably doesn't even have the battery charge over discharge protection, quality is not guaranteed.

Q:The LED lamp how to realize the function of adjustable brightness and color temperature?

Now LED dimming color absorb dome light, there will be 2 class, is a fixed brightness and only three color temperature (warm white, neutral white, is white), the cheaper; Another is called stepless adjustment, such as PI dimming color photoelectric (PI - TECH) absorb dome light, brightness and color temperature can be adjusted independently, each 10 gear, as many as 100 kinds of effect, by remote control by remote control.

Q:LED lamp, adjustable light, new to buy less than a week; Strip, it took more than 4 years. This morning on the strip, light will flash. To strip of the others will be fine. But the same old jack plug in the computer, but everything is normal, but the strip will issue "hissing" sound. Supposedly the lamp power is smaller than a computer, this is how to return a responsibility? I think baidu has said strip contact.

Lights flash that strip poor contact, the lamp power is small, so can't hear hissing "sound, the computer power is relatively larger, current is big, hissed." sound that strip poor contact; If you have the tools to open the strip to see whether the contact deformation, the whole connection piece, make can remove plug well, your problem is solved.

Q:Do LED lamps really protect your eyes?

LED desk lamp is a direct current (dc), with common desk lamp of comparative advantage is no stroboscopic and dazzle light, so is good for your eyes!

Q:What kind of light the lamp that shield an eye?

Use their phones to test if no stroboscopic, open the camera to the LED light source, the screen flash is no stroboscopic, no flash not; See if it's bright enough, in general, have 4 w is very light, but can meet the above requirements, the basic no problem. The LED is the trend of The Times:

Q:LED lamp stroboscopic serious, can you tell me the reason?

Is zero, because ac 100 times per second of voltage is zero, if simply step-down rectifier circuit, or filter capacitance is too small, through the LED current is 100 times per second interrupt, LED is a semiconductor light emitting, reach nanosecond, response time and tungsten by electric heating filament reach the state of incandescent light emitting, filament cooling speed is about tens of milliseconds, you can turn on the LED desk lamp to see the inside of the circuit.

Q:Energy-saving light bulbs or LED bulb can't use on the dimmer lamp holder?

When turned on the dimmer file, after the dimmer switch power supply, with little distinction between alternating current (ac) and direct, so you can normal lighting energy-saving lamp or LED lamp. This work under the state, the lamps and lanterns also won't have bad influence. Only the dimming function is wasted.

Q:How long will leds last?

Absolute durable, more durable than bulb or tube had, but are you going to buy factory goods, don't look at somebody else's expensive, but it is good, no matter the luminance or life is good.

Q:LED lamp, lens type and light type which good,

Because of the high LED lamp brightness, focus, look into the LED lamp bead will be very dazzling. If you don't look straight into the LED lights, people's eyes, it is recommended to use a lens type, using planar light conversely.