Factory direct wholesale new product portable usb led light rich colors usb led lights

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usb Light

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Guangdong China (Mainland)



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Packaging Detail:Carton
Delivery Detail:3-15days


1.By using low rated voltage 5v,power 1.2,safety and high efficiency.

2. Connectable to USB ports on any iBook, PowerBook, Cube or PC notebook.  

3. Plug and play

4. Powered by USB port, no external power needed

5.Usb led light for night work

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Q:How much is the voltage across the 20 LED lamps in series?
LED lighting general LED lamp belt voltage, conventional specifications are 12 volts and 24 volts, if it is 12 volts, that voltage is 420 volts, if it is 24 volts, that is 840 Volts
Q:How does the LED light string flash?
LED because of its special structure, frequent startup does not reduce its service life, but high temperature can significantly shorten its life. So cooling is important for LED.
Q:I want to do a string of LED lights that can use batteries. About 55 or so. The lights are 5MM blue. How can I work? Urgent urgent!!
If it is a general common blue LED working current is 20 mA, voltage of about 2.5V can be lit, the battery power can be used in parallel, the benefits of this connection is one of the damage does not influence the normal operation of other LED. And each LED string to a current limiting resistor, LED protection lamp, prolong life, calculation formula of the resistance for V / 0.02A=: voltage current resistance: 3V, battery powered =3 / 0.02=150. You want to supply 55 LED batteries to work together, the total current is up to 0.02x55=1.1A, i.e. 1AH (ah) capacity of the battery can work 1 hours or so.
Q:Performance and characteristics of LED lamp string
The 1.LED light string is led by a light emitting diode packaged in an imported chip;The design of light angle 2.LED lamp string of the larger angle angle of >120 degrees, uniform mixed color, no color;3.LED lamp string selected LED dedicated constant voltage power supply mode, circuit design for constant current circuit, the work performance is very stable, so as to ensure normal life >5 hours;
Q:LED lights string broken, how to repair?
As an emergency treatment, you can also short-circuit the open circuit of the LED lights. Used to restore normal work.
Q:How do you connect the LED lights?
A series of even parallel. Are not clear, boss, you want to use LED do what?There is a gap, which is the positive pole of the LED (usually the long foot is short and the foot is negative)
Q:What is the principle of the LED series?
Led 2 polar tube inside chip oscillator circuit, and the general appearance led 2 polar tube without distinction, only connected to the power supply of two kinds of color turns light, 1 seconds, I bought the 5MM red, blue autoflash. From the appearance of the series, but not necessarily in series
Q:The top LED lights always burn the bulb in series
Do not know what kind of drive you are, try to reduce the current of LED, do not exceed the rated operating current of LED on the line. The method of reducing current is related to drive circuit, and the current limiting method is different for different circuits.
Q:The color temperature of LED light string
Light source temperature is different, light color is also different:The color temperature is below 3300K, the color is red, and gives a warm feeling. There is a sedate atmosphere and a warm feeling.The color temperature is in the middle of 3000--6000K, and there is no obvious visual psychological effect in this hue, and there is a refreshing feeling. It is called neutral color temperatureColor temperature exceeds 6000K, light color slants blue, give a person with cool feeling, commonly referred to as cool color temperature.
Q:Led full-color light string and how to control wiring
Three line full color exposure lamp data signal two, the controller needs two wire negative electrode control, GND signal connected to the DAT surface

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