The PVTECH Emergency Battery Backup is an all-in-one general-purpose lighting and battery powered emergency backup LED solution. It is a great choice to provide 3H of emergency illumination in the event of loss of power. If the city power is working well, it can work as a general light, which support on/off switching operation. Once the city power suddenly shut down, the internal driver switches on to provide illumination to help building occupants safely find their exit. It is idea for many facilities such as office buildings, schools, hotels, multifamily apartments, hallways, corridors, and stairs.