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How to Check If the Ballast Is Bad in Fluorescent Lighting . Remove the lens cover from the fixture. Depending on the style of fixture, the lens cover wraps around the fixture, is held to the fixture with a series of screws or slides out of the fixture body. Remove the fluorescent bulbs from the fixture. If your fixture uses circular fluorescent bulbs, a plug connects the bulbs to the ballast. U- shaped and straight fluorescent bulbs install into fluorescent sockets that connect to the ballast.
Laura Peters evaluates the photometric, electrical, and financial hurdles to retrofitting linear fluorescent lamps with LED-based tubes, including both plug-and-play.
U- shaped bulbs are held in the socket with tension springs. Pull the U- shaped bulbs from the tension springs to release them from the socket.
- Evelyn, There are no LED tubes to my knowledge that operate on the ballast that your existing T12 lamps run on. My suggestion is that your husband replace the.
- How to install a LED fluorescent tube - bypassing a ballast, instructions by LEDs Unlimited.
Twist straight florescent bulbs clockwise or counterclockwise to release them from the sockets. Remove the ballast cover from the fixture, if the ballast is not already exposed. This cover attaches with screws or inserts into slots cut into the fixture. Replace the ballast if it appears burned, swollen or is leaking oil. Set the multimeter to the ohm setting.
Touch the remaining probe to the ends of the blue, red and yellow wires leading from the ballast. Depending on the ballast, you may have only red and blue wires. If the ballast is bad, the needle on the multimeter will not move. If the ballast is still good, the needle should sweep to the right across the face of the multimeter. Install a new ballast, if necessary. Replace the ballast cover on the fluorescent light fixture.
Install the fluorescent bulbs, replace the lens cover and turn the power back on to the fixture at the circuit panel.