Changed out the bulbs and no change they still flicker and.
Fluorescent emergency light not working.
Make sure that you buy the right type and brand of ballast for your light and check with a professional if you have any questions.
A good way to check that your ballast is the culprit is to turn on a voltage detector and hold it next to the wires supplying power to the ballast.
Just remove one of the still working pair of fluorescent tubes and replace it with each of the questionable tubes one at a time.
As i said in the intro we noticed this happening over a 3 4 week period.
99 of the time it will be one of the tubes that is the culprit.
Fluorescent light troubleshoot repair the lights would flicker and sometimes not come on at all.
Inspect the fluorescent tube.
Aside from a burnt tube other factors such as a worn starter and loose or oxidized electrical contacts can contribute to a fluorescent light not working properly.
Step 1 verify that the fixture has power by making sure the switch is on and the breaker to the area is not tripped.
A flickering fluorescent bulb means that it or one of a dependent pair of bulbs in the fixture has bought the farm.
What about pairs of fluorescent tubes.
A fluorescent light fixture that is not working or working well can be caused by several problems.
Troubleshooting fluorescent lights is typically not complicated but involves the inspection of several parts of the light.
Fluorescent lights require a ground wire from the electrical circuit to be attached to the metal frame of the light fixture and the grounded metal reflector must be mounted within 1 2 inch of the lamps.
One clue that your ballast is the reason for a non working fluorescent light is the light bulbs struggle to turn on.
When the ballast beaks down via wear and tear the fluorescent bulb will stop working and a new bulb will not work in its place.
Option 1 good find a type a led tube that works on the emergency fluorescent ballast another option is to figure out the emergency ballast part number being used in the emergency fixtures and check with the manufacturer to see if their type a led tube will work on that ballast.