Is there a light that goes out during the day and turns on automatically at night?

Yes, such as LED sound and light control.

LED acousto-optic control lamp is an acousto-optic control technology which integrates sound control, light control and delay automatic control, and has built-in sound sensing elements and light effect sensing elements.

When the light is strong during the day, it is self-locked by light control, and when there is noise, it is not energized to turn on the light; When the ambient light is dim at night, the switch will automatically enter the standby state. When there are voices, footsteps and other sounds, it will be turned on immediately and the lights will be turned on. After a delay of half a minute, the power supply will automatically turn off.

It can prolong the life of light bulb by more than 6 times and save electricity by 90%. It can not only avoid falling and bumping caused by looking for a switch in the dark, but also prevent the flickering phenomenon of corridor lights.

Extended data:

With the gradual elimination of incandescent lamps, fluorescent energy-saving lamps are no longer suitable for acousto-optic control technology, and the advantages of LED acousto-optic control lamps are becoming more and more obvious. With the development of economy, China's real estate has developed rapidly, and the number of buildings around the country is increasing, which provides space for the development of LED acousto-optic control lights.

Optical switch/optical time controller adopts advanced embedded microcomputer control technology, which is a multifunctional advanced time controller (time controller) integrating optical control function and ordinary time controller. According to the need of energy saving, the optical control probe (function) and time control function can be turned on at the same time, which will achieve the best energy saving effect.

It is the best energy-saving control device for street lamps, landscape lamps, advertising light boxes, neon lights and other equipment; It can be widely used in streets, railways, stations, waterways, schools, power supply departments and other application places that need time control. The main brands in China are Internet of Vehicles, Aibes, etc. The representative models are ET 10 1. 1, ET 102. 1, etc.

Baidu Encyclopedia -—LED acousto-optic light control