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 ~

LED desk lamp, sure enough, under 3 w is divided into warm light color temperature below 4500, more than 5500-6000600 is white light don't choose the color is not straight slant blue, warm red light is yellow, like the light bulb.

Q:22 what is the power of the led lamp charging desk lamp v

Desk lamp is generally have a transformer, the home into a 12 v voltage of 220 v.I hope you can help me

Q:LED dual-mode folding desk lamp on external what meaning be

Dual mode, it is to point to can use ac and dc two modes of desk lamp power supply. Both external and internal, and ultimately to the LED lamp bead above, must be dc power supply.

Q:Led lamp is broken. Who knows what reason be? How to repair?

Is the light of the serious failure, the main reason is caused by bad heat dissipation and current is too large, broken can't repair, change the wick

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

Don't believe the LED, he is still a myth, LED light source is the most hurt eyes. Do you see what do the lamp act the role ofing use LED desk lamp.

Q:Long amount of brand of LED desk lamp capacitor charging Fried v100uf 50

This kind of LED desk lamp, 220 v power supply is to step down by means of capacitance current limit, once the no-load, after rectification voltage will be increased to 310 v, 220 v x under the square root of 2), seconds kill the capacitance of the withstand voltage 50 v. So this failure, you must first check whether the no-load and load of power supply circuit is normal battery, check the battery cables are broken, the charging current limiting resistor is burned, if these are no problem to check current limiting capacitance itself isn't breakdown (usually the breakdown causes 220 v over-current, empty trip meeting).

Q:I had had a 20 leds rechargeable lamp, then search the battery is broken, I version removed yourself to make the lamp, can directly use electrical appliances, please start

Certainly not, didn't understand such a simple truth. What are you look at the battery cell, average is 1.5 v dry cell, lithium battery is 3.7 v, and then see how sections parallel to calculate the voltage, if it is 5 v, just get a phone charger turn appliances, and then give you the lamp power supply.

Q:LED lamp rushed into electricity, no battery is bad, but is not into electricity, charging indicator light (not bad) didn't also bright, is how to return a responsibility?

Light is not bright, can be sure is there is something wrong with the wire or internal charging circuit has a problem. Judge fault: 1, if the line is broken, looking for businesses of the same wire, in a first try (don't have to buy wire to test), indicator is not; 2, the light is bad, but little chance (if this is the case, the battery doesn't charge into the electricity, the battery has high pressure resistance state sulfide, battery need to be repaired). 3, internal charging line fault: most likely internal CBB capacitor to boil road, need to change. For this kind of lamp, the most easily broken electronic components in the charging circuit is the CBB capacitance. Can go to the repair shop repair. Only more than 1, 3 kinds of possibility is high, the highest 3, was ruled out small battery (internal small battery) problem, because the light is not bright, batteries to electric light advocate the lamp, that the battery is resistance, capacitance resistance step-down charging circuit to charge of no-load voltage can reach more than 300 v, is impossible, and no current flows through the indicator as long as is good will on, even if the battery fully charge it into electricity, indicator light will be bright. I have a problem is battery repair instrument design engineers, can ask me, I design the battery repair instrument can repair indicator but any vulcanization of battery and charge it into electricity. There is a way to judge whether there is a current through the, is at the moment of plugged into the plug has a tiny 1 of "pa", or "chip", close to the ear, can hear, careful observation can even see tiny spark, then the CBB capacitance not bad, but the light is bad, and the battery has the possibility of sulfide. Downstairs and a brother named longsheng fushun said about the battery internal resistance and resistance capacity no-load voltage of charging circuit, considered a battery sulfide failure (charge it into electricity, indicator), but not necessarily.

Q:Consult the LED rechargeable lamps not to save battery What do I do

This is because the battery is broken, the solution has two: 1, the replacement lamp battery. 2, connect the power charger use desk lamp.

Q:The LED lamp can use while charging?

Can, but it is not recommended to do so. Mobile phone can also charge while playing, but also have exploded. While filling in terms of electrical damage!