Troubleshooting Fluorescent Lights that Flicker

Fluorescent lights are often the choice of lighting for businesses. These lights are also often found in older homes. Fluorescent lights last a long time (for years,) and they are also incredibly energy efficient, which explains their popularity. A gas is present within the light tube, and once electricity is introduced, the gas illuminates. Eventually every light will burn out, and fluorescent lights are no different. These lights will often hum or flicker when they are about to fail or simply will not light. The article that follows will help you track down and fix possible problems that are causing your fluorescent lights to flicker.

The Light Tube is Burned Out

Fluorescent bulbs do not burn out often, but when they begin to, they may start to flicker. In time, the light will not turn on at all. In order to check the light tube, you simply have to remove the light cover. You will most likely need a ladder in order to reach it. The cover can be removed one of several ways, including push tabs, screws, or by removing clips. After removing the cover, look for black or gray spots on the light tube. This means the bulb has burned out and has to be replaced.

Loose Socket

The socket is located on the fixture that the fluorescent lights snap into. They are usually only on one side but can be on both. Make sure the light is turned off, and then remove the light tube. The tube is easily removed by gently gripping it at both ends and pulling down. Touch the socket, and if it moves, tighten the screws, as it should not move at all.

Replacing the socket is easy if you have to do it. Turn the power off at the breaker and use a voltage tester to make sure the power is off. Remove the screws holding the socket in place and gently pull it away from the fixture. Loosen the screws holding the wires, buy a new socket identical to the old one, and then hook the wires up to it identically to the old socket. Replace the socket and screw it in place.

Damaged Contacts

The contacts on the light tube or socket can become bent or oxidized. If the contacts are bent, use a pair of pliers to straighten them out. If there is oxidation, use a cotton swab dipped in alcohol. Rub the contacts with the alcohol to remove the oxidation. If the contacts are broken, then you will need to replace the socket.

Starter Problems

Old fluorescent lights came complete with a starter. They're metal cylinders that screw into the fixture located below the tubes. Press the cylinder in, and then twist it and pull it out. Replace it with a new one.

Wiring

Remove the covering over the light and the tubes. Remove the light socket from the fixture to expose the wires. Look for oxidation and brittleness. Remove the wires and trim at least an inch from them and connect new wires with a wire cap.