a. Check whether the power supply is working normally and whether the indicator light is on. If not, please check whether the power supply is connected well;

b. Check whether the power cord of the lamp bead is well connected with the positive and negative poles of the power supply, and whether it is reversed. If the above problems exist, please connect them correctly.

LED lamp beads for voltage requirements:

The nominal 3V LED lamp beads, in fact, different colors have different requirements for current, yellow requires the smallest current, followed by red, green, white, and blue. Too much current will burn the wick. Using a 2.4V rechargeable battery, it is most likely to be burnt, because even if the voltage is not large, but the current is too large, it will still burn at will.

No power detection LED:

In the case of no electricity, in order to make the selection convenient at the time of purchase, it is recommended to prepare a 3V button battery, which can be used to easily check what light the LED emits when choosing.

Reasons why high-power led lamp beads burn out:

01. The upper and lower filaments are called gold wires in our industry. Pure gold is used for conducting electricity. There are two positive electrodes and two negative electrodes. A really good product will have a fifth wire, which is welded to the Zener tube. protective.

02. When the filament becomes shorter, it will clearly tell you that your lamp has been burned by a large current, which is equivalent to an open circuit.

03. The driving current of high-power 1W is about 350ma, and the working voltage is between 3.2-3.6V. Please pay attention when using it. Excessive current will definitely burn the lamp.

04. Generally, the aluminum substrates of the three 1W lamps are driven by about 12V, and few of them are directly used at 220V. Do you have a constant current source or a 12V driving power supply?