Supply and Installation 

Indian Standards require that exit lights be tested every 6 months and must remain illuminated for at least 90 minutes running on battery power. Most emergency exit signs have a small “push to test” button on the casing. Press this button and the lights will come on, powered by the battery.

A fully charged battery in good condition should power an emergency light for at least 90 minutes as mandated by UL (Underwriters Laboratories). If the battery cannot last for 90 minutes, it must be replaced. The UL 924 Listing is only featured on batteries that meet or exceed UL's rigorous testing procedures.