This depends on the rated current of the LED. Generally speaking, it is 350mA, that is, a group of 4 watts. LED light-emitting characters are light-emitting characters made with light-emitting diodes as the light source. Led can save a lot of power for the country and users, and save a lot of working hours for the contractor. The development of advertising LED application technology in China. Its unique semiconductor ultra-high brightness light-emitting diodes (LEDs), especially nitride white light-emitting diodes, have the advantages of small size, low voltage, long life, fast response, no stroboscopic, less energy consumption, less heating, etc., and are gradually becoming a new generation of green, energy-saving, environmental friendly, long-life lighting source.