Q:Someone said to 7 w is enough light It does not hurt the eyes But I go to TB, some sellers told me 3 w is enough (equivalent to an incandescent bulb 40 w) don't know that right?? ...... Would like to ask how many watts of LED desk lamp what you buy is good for your eyes? What color temperature in right? Thank you ~

In general, the bright LED lights, the brightness of the 1 watt equivalent to 20 watts incandescent lamp, therefore, used as a table lamp at close range, 3 watt LED lamp brightness should be sufficient. About the color temperature, personally think that as long as you feel comfortable, but the color temperature is too high may feel dazzling, easily tired... Might as well choose between 3500 ~ 6000 ° K.

Q:LED bulbs can put in the desk lamp of adjustable brightness?

Bad,, it will damage the silicon controlled voltage regulator, The desk lamp of adjustable brightness can only answer the incandescent light bulb

Q:How many watts of led the desk lamp that shield an eye with good students

The desk lamp that shield an eye is the use of no flicker, no stroboscopic, eye fatigue, not all metal texture, elegant, classic. Using high brightness and low light failure LED strips, low voltage DC12V switch type constant current drive, no stroboscopic, no radiation. Unique polarized light membrane technology, can make the LED light uniform directional output, not glare dazzling, the prevention of myopia.

Q:With 10 v charger with 6 v rechargeable batteries used at the same time, that is used when mains mains, there is no mains automatic conversion electric battery. Three light bead is in series or parallel good? Add how much resistance? Step-down to to the charger? If I want the dimmer, should how to do, had better have circuit diagram

If you are sure with 6 v battery power supply, then I suggest you use four leds, two series and then parallel, such high efficiency

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:Philips crystal sharp LED the desk lamp that shield an eye light bulb is broken?

Philips has a one year free warranty. You can go with a single warranty. And the led is not so easy to bad. If you look at the power adapter is broken. If you are in guangzhou, I hope I can help you. I'm in philips.

Q:The voltage of the LED lamp is about how much

Power are using domestic load voltage 220 v, after ac into dc, again after decompression for the LED power supply, how many v voltage, LED need according to the design to have different version for different voltage, such as there are 5 v, 6 v, 9 v, 12 v, 16 v, 24 v, 32 v, etc. A LED light-emitting diode connection: string increase the voltage, electric current is constant. And even the constant voltage, electric current increase. For reference only.

Q:How long will leds last?

Leds biggest characteristic is high efficiency, long life and light. You said it is durable? As for the price will be much more expensive than ordinary light bulbs, specific how many I can tell.

Q:How to distinguish whether the led lamps and lanterns glare, is there a standard?

Glare can be divided into disability glare and arrow glare. Who reduce eye glare called a disability glare, it will be Reduce the visibility of the visual object, but not necessarily produce uncomfortable feelings; Who make the person produces the feeling of displeasure glare is called no Comfortable and glare. Cause glare of led lamps and lanterns has the following four major factors. (1) the light source brightness factor: the higher brightness, glare, the more significant. (2) light source location factor: the closer it gets to the line of sight, glare, the more significant. (3) the light source appearance size and number of factors: the apparent area, the greater the number of light sources, the more the glare, the more significant. (4) the surrounding environmental factors: environment brightness is dark, eyes adapt to lower brightness, glare also becomes more significant. Dazzling light not light, but for the concept of lamps and lanterns. Leds - t8 fluorescent lamp has been rise, are alternative Fluorescent lamp market, due to the lamps and lanterns is ready, can't change, leds - t8 fluorescent lamp needs to ordinary fluorescent effect Fruit near, thus formed the concept of glare. Anti glare products, need to consider the brightness of the led, led between the row Cloth, spacing, the led itself to the distance of the optical cover, the shape of the optical cover, light transmittance, etc., rather than simple Shell or configuration problem.

Q:The problem with LED charging lamps?

Now technical innovation, new types of LED lights are super save electricity. Filling desk lamp I felt at least on a 12 hours in order to be qualified, otherwise how enough