Sound and light control screw base(for less than100W bulb) Sound and light control screw base(less than100W bulb)1.People who come the light on ,who go the light out,without switch 2. Working on night,but not in day .when the lights is dim, as long as the sound of a 52 ± 8dB, the lamp is lit,after 60 ± 20 seconds will automatically off3. It is economical, easy to install, can be equipped with an ...