LED acousto-optic controls frosted bulb integrating the sound, light control, and time-delay function into one, use many dozen white brilliant green LED for light source, the power consumption of a 2W LED acousto-optic bulb is equivalent to that of a 25W incandescent lamp brightness. It is very easy to use, no switches, and controlled by the sound. At the same time it can be lit automatically, and shut down 45 seconds later. So it is an ideal product for saving energy which are widely used in the alleys, hall, the aisles, corridors, staircases road, bathrooms, basements and other palaces in which need to require to turn off the light automatically.