LED lamp bead refers to a single light-emitting diode, by a number of lamp beads according to the need (power size) orderly arranged components called wicks usually also called lamp board. In order to better distinguish in use, this part is called the lamp board (wick), the buck rectifier board in the driver is called the power supply, 220V AC input, a certain value of DC output, the two are connected by line, when the fault can be easily repaired (quickly find the fault point).
The so-called wick is also composed of several hundreds of lamp beads, a single lamp bead, in actual use, are several lamp beads in parallel to form a wick to meet the voltage and current and brightness requirements.