According to the Gizmodo article on technology blogs, emergency lights are placed in public places so that in the event of a sudden power outage, there is still a light source that is safe. Occasionally, there will be a blackout in the home. If you can equip your home with similar emergency lighting equipment, it will be convenient.
The emergency lighting system of the American LED lighting brand Mr. Beams can be easily installed at home. (But families with children should pay special attention because children can easily mistake them for toys.) In the event of a power outage, the emergency lighting system will automatically start.
This emergency light can be installed anywhere on the ceiling, walls, floors, etc. for up to 40 hours of continuous power. It should be noted, however, that the core of such an emergency lighting system is a rechargeable remote control device that needs to remain connected to the outlet at all times. Thus, when a power outage is detected, the device can activate all emergency lights by automatically transmitting a wireless signal. The effective range of this wireless signal is 70 feet.