1, the power supply is not normal caused the problem:
01. Check the power supply is not working properly, the indicator light is not lit, if not lit up, please check the power is not connected;
02. Check whether the power cord of the lamp is connected with the positive and negative poles of the power supply. Is there any reverse phase? If the above problems exist, please connect correctly.

2, LED lamp beads for the voltage requirements:
Nominal 3V LED lamp beads, in fact, different colors of the current also have different requirements, the minimum requirement of yellow current, followed by red, green, white and blue. The current is too large, will make the wick burnt. But the current is too large, will still be burned.

3, how braided LED lamp beads luminous color:
In the case of no power supply, if in order to choose the convenience of the purchase, it is recommended to prepare a 3V button battery, when used in the selection of the battery can easily check the LED light.

4, high-power led lamp beads burn reason:
01, up and down the two filaments, the industry called gold line, pure gold, do conductive use, two positive, two negative, the real good product there will be the fifth line, welding Zener tube, and protection effect.
02, the shorter filament shows that the lamp has been burned by a large current, the equivalent of a broken line
03, high-power 1W drive current around 350ma, the working voltage between 3.2-3.6V, please be sure to pay attention to the use of excessive current will burn the light
04, the general three 1W aluminum lamp are about 12V drive, very few directly on the use of 220V in use must have a constant current source

5, LED lamp beads yellow reason:
LED encapsulant yellow mostly due to epoxy resin and curing agent does not match due, but also can not rule out the outer plastic sealing time is too long.

6, LED lamp bead leakage reasons:
Machine equipment is not grounded, the staff did not wear electrostatic wristbands (must be corded). Caused by improper electrostatic protection. Then there is the packaging process, welding PAD welding bias, the last is the quality of the chip itself hidden problems.

7, LED lamp beads should be capacity, the problem of inductive load:
Neither, LED lamp beads is a diode, you need to be able to work a positive on-voltage, usually 2-3.5V, in addition, the current size can control the brightness of LED lamp beads. LED lamp beads just electric energy into light energy.

8, with LED lights pearl big reason:
01: Iron bracket poor thermal conductivity.
02: Epoxy yellowing.
03: chip and bracket contact is not close enough.
04: chip attenuation big.
05: If it is white, there is phosphor decay problem.