In the event of a power outage or damage to facility lighting, emergency Exit Lights clearly mark the location of emergency exits to a property, allowing evacuation even in the event of total power failure thanks to back-up battery power.
In the event of a fire or other serious event
that compromises the integrity of a building, electrical systems
and standard lighting may be damaged.
Emergency lighting ensures that corridors, hallways and other vital areas in the protected property remain lit and accessible during an emergency, allowing residents and staff to evacuate with the minimum of risk.
Like automobile batteries, which are continually discharged and recharged during normal vehicle operation, proper testing extends the life of batteries serving emergency lights or EXIT signs. Still, it must be remembered that these batteries have a limited service life. Because there are many factors that affect battery life (e.g. changing temperatures), it’s not possible to set a hard and fast rule on how long a specific battery should last.
The two most commonly used battery types for emergency lighting are lead acid and nickel cadmium. While the equipment manufacturer would be the best source for information on battery life, a maintenance-free lead acid battery might be expected to have a service life somewhere between 5 – 10 years and a maintenance-free nickel cadmium battery an estimated service life of between 10 – 15 years.
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