How to make EMERGENCY LIGHTING for critical areas of insitalation|ELECTRECA

When power from UTILITY supply shades and the backup generator starts,.... There is always a delay in seconds for the changeover switch to engage generator power. That delay( in seconds) is enough time to cause injuries in the black spots or to deaths in theatres. because of darkness
There we need EMERGENCY LIGHTING to overcome this problem.
EMERGENCY LIGHTING will be on within the delay time after backup power engages it goes off automatically.

Видео How to make EMERGENCY LIGHTING for critical areas of insitalation|ELECTRECA канала ELECTRECA