The state requires the installation of sound control lights in school corridors. According to the relevant data, the sound control lamp is a sound control electronic lighting device, which consists of an audio amplifier, a frequency selection circuit, a delayed turn-on circuit and a thyristor circuit. The country requires the school corridor to be equipped with voice-activated lights for lighting after dark at night, which will automatically turn off after 30 seconds to one minute after being triggered, but the voice-activated lights will not turn on during the day due to the photosensitive circuit.