The voltage of LED string is generally 12V DC, so it is necessary to use switching power supply, which depends on the power and connection length of LED string. If you don't want each led string to be controlled by one power supply, you can buy a high-power switching power supply as the main power supply, and then connect all the LED string input power supplies in parallel (it can be lengthened if the wire diameter is not enough), and the power supply is unified by the main switching power supply.
Manufacturing principle of led lamp
LED is a solid semiconductor device that can convert electric energy into visible light, that is, light emitting diode, which can directly convert electricity into light. The heart of LED is a semiconductor chip, one end of which is attached to the bracket, one end is the negative electrode, and the other end is connected to the positive electrode of power supply, so that the whole chip is encapsulated by epoxy resin. The semiconductor wafer consists of two parts, one is a P-type semiconductor, in which holes are dominant, and the other is an N-type semiconductor, mainly electrons.
When these two semiconductors are connected, a pn junction is formed between them. When the current acts on the chip through the wire, the electrons will be pushed to the P region, where the electrons will recombine with holes, and then the energy will be emitted in the form of photons, which is the principle of LED light emission. The wavelength of light, that is, the color of light, is determined by the material forming the pn junction.