Blinking can also be caused by a loose connection in some of the wires inside the fixture, or by a defective ballast. It can also be caused by low temperatures (below about 50 degrees) unless you have special low-temperature tubes and low-temperature starters.

How do I stop my fluorescent lights from flickering?

Read the part number stamped on the side and check online to see if a replacement is even available. If one isn't, it's time replace the entire fixture. Once you have the new starter in hand, simply screw or push it into the fixture, turn on the power and the flickering should have stopped.

How do I know if my fluorescent starter is bad?

Return fluorescent bulbs to the socket if they were removed to reach the starter. Turn on the switch. If the light comes on and doesn't flicker continuously, the starter was the problem. If the fixture doesn't light or continues to flicker, the problem lies elsewhere.