LED lamp beads commonly used model 3528, this power is 0.06w, the current is 20 MA, the voltage is 3.0-3.6 volts; The other is 5050, this model of lamp bead power is 0.2w, the current is 60 MA, and the voltage is 3.2-3.6 volts. In addition, the models of LED beads are 3014, 4014, 5630 and so on.