256 colourful lamp with random changeable colours

The invention includes a power supply module, red, green and blue three primary colour high-power light-emitting diodes, a lampshade, a control mode selective unit, a user input unit, A/D converting unit, a microprocessing unit and a diode driving unit. The said light-emitting diodes are lighted in order and in each lighting period the sum of lighting time of three colour diodes is not greater than 0.02 second. Using a potentiometric knob can hand regulate colours.