If it does not light up for the entire thirty seconds you have a bad exit sign battery.
Exit sign light not working.
Plus leds consume less energy than incandescent bulbs saving you money over the lifetime of the exit sign.
Therefore an exit sign that appears to be working normally may not work at all during a power failure because the low voltage bulbs have burned out.
Checking multiple emergency or exit sign for bad batteries.
To know if the battery is bad in your exit sign push the test button on the bottom edge of the exit sign and hold for thirty seconds a broom handle comes in handy for this.
Replacing an exit sign is a fairly straightforward do it yourself job if you have a bit of experience with electrical work.
In some larger buildings emergency power to exit signs and emergency light fixtures is provided by an emergency generator.
In some larger buildings emergency power to exit signs and emergency light fixtures is provided by an emergency generator.
Keeping emergency exit signs in working order is a high priority.
Step 1 check the power source if the light is out.
Therefore an exit sign that appears to be working normally may not work at all during a power failure because the low voltage bulbs have burned out.