How to Silence the Buzz of Fluorescent Lights

Switch off the power or trip the circuit breaker if the light is directly connected to the mains. For lights permanently wired to the electrical system, deactivate the corresponding breaker. Never attempt disassembly without disconnecting the power source.

Detach fluorescent tubes carefully and set aside in a secure location. Ensure they remain intact! Safely place them to the side.

Take off the cover plate concealing the bulbs. Typically fastened with screws or clips, it's easily removable. Keep any screws or clips in a designated spot for reassembly.

Disconnect all wires connected to the ballast. The ballast, a weighty metal block, has multiple wires protruding from it. Detach these wires from the power source and the terminals at the ends of the unit. Some units may necessitate wire cutting, requiring the use of wire nuts for reassembly. If the wires are stubborn, cut them as necessary.

• If wire cutting is necessary, take photographs beforehand to ensure proper reattachment.
• Warning: If the light has been on, the ballast may be extremely hot.

Eliminate the ballast. Typically secured to the light fixture's sides with screws. Remember to retain all screws for future use. Some ballasts fit into metal grooves, known as tabs, to alleviate screw weight. Observe how your specific ballast is installed before removal to simplify replacement.

Purchase a new electronic ballast that matches your lamp's wattage, using the old one as a reference. Nowadays, electronic ballasts are predominant and can cost anywhere from $12 to $200 USD, depending on your lighting setup. Utilize the old ballast to determine the precise wattage required for the replacement. These ballasts are readily available at most major hardware stores. When making the purchase, ensure you know your light's wattage, the number of bulbs it houses, and the wiring configuration of the old ballast.

• Verify that your light fixture does not utilize LED bulbs, as they don't require ballasts.
• Confirm compatibility between the bulbs you're using and the ballasts you intend to purchase. Magnetic ballasts are no longer on the market, so you might need to switch bulb types.

Secure the new ballast onto the fixture. Before delving into the wiring, ensure the ballast is firmly mounted onto the fixture.

Reattach the wires according to the instructions provided with your specific ballast. Double-check that you've connected the color-coded wires to the correct terminals and the power source. Take your time with this step; getting it right on the first try is crucial. If the wires simply clip into place, this process should be straightforward. For older models, you might need to perform some basic wiring. Follow these steps:

• Cut the wires to the appropriate length.
• Strip off ¹⁄₂ inch (1.3 cm) of sheathing from the wires.
• Group together the matching wires from the ballast and the light fixture as per the ballast's manual.
• Insert both ends of the matching wires (one from the ballast, one from the light) into the wire nut.
• Twist the nut clockwise to secure the wires tightly, and give it a gentle tug to ensure everything is firmly connected.

Reinstall the cover and tubes, then switch the light on to test. Fluorescent lights essentially consist of only two components: the tube and the ballast. Therefore, replacing the ballast is usually sufficient to address issues like humming bulbs.

• If you experience flickering or persistent problems, inspect the sockets or wire connections. A faulty or loose connection could be to blame. For electronic ballasts, check the ground wire.
• Consider replacing the light altogether if problems persist. Light fixtures are inexpensive and easy to replace.

• Ensure to acquire a ballast suitable for the number of lamps in your fixture, and verify that the bulbs are compatible with the ballasts.

• Do not open the casing until you've confirmed that the power is switched off.
• Remember that old T12 fluorescent bulbs contain mercury, so ensure proper disposal.
• Exercise caution to prevent dropping any bulbs.