Now for the moment of truth! NOTE: There are two types of ballasts: electronic and magnetic. Turn electricity off. You get this information by removing the fixture and measuring the ballast. Since LED lights work on low DC voltage, they need a driver. Otherwise it is probably screwed in, so find and remove the screws. If you are trying to replace the ballast in a Circline adapter, (a round plastic thing that screws into a standard light bulb socket and has a place to snap a Circline lamp in around the outside), it is not easily possible. Remove the bulbs and covers, and locate the ballast inside the lighting fixture. Cap the wires with wire nuts. Connect the input hot and neutral wires (black and white) coming from the build to the output hot and neutral wires coming from the fixture. So if you’re installing a fluorescent light in a walk-in freezer, this is not the most reliable ballast mechanism for the job. Recommended troubleshooting sequence: Problem Check Corrective Action Lamps do not start and known “good” replacement lamp does not start What kind of ballast your fixture has: The types that are most often used with Circline fixtures are Pre-Heat (warm-start), Instant Start and Rapid-Start. Screw the electronic ballast into the fixture, in … If your lamps don't have numbers, you can look at the ballast label to see what they should be. Instant Start ballasts provide approximately 10,000 starts before 50% of lamp failure. What do I do? The voltage of the fixture: This will probably be 110 or 220. If it is in a can it will probably just lift out with a little force. Remount the fixture making sure no wires get caught under it, and reinstall the lamps and the cover. Make sure that the wires that connect to the lamp(s) are through the appropriate holes so that they connect to their appropriate lamps. You could also try using a multimeter set to measure resistance. When the filaments have heated up, the ballast then provides a suitable voltage to the lamp. . Type B: These tubes are also known as ‘Ballast Bypass’ or ‘Direct wire’ T8 LED tubes. UltraStart® provides greater than 100,000 starts. Type A+B: Also known as ‘Hybrid’ T8 LED tubes, Type A+B tubes work with or without a ballast. The problem with this type is that the lamp will have trouble turning on if it is sitting in sub 50-degree climates. Also try looking under the base of the lamp if it looks big enough. On the other hand, an. Make sure that you connect the wire nuts securely and that no bare wire shows from under them. How to Replace a Fluorescent Light Ballast Remove the Bulbs and Fluorescent Light Fixture Cover. Now, install the T8 LED tube on the fixture. After cutting the wires providing input to the ballast, cut the neutral and hot wires that go out on the other side of the socket. Most T8 tubes will have a hidden ballast, covered with a casing and resting behind the tube light. The number on the lamp(s) in your fixture: This will probably be FC6T9, FC8T9, FC12T9, or FC16T9. Now, locate the ballast on the existing fluorescent fixture. The tube lights that use a magnetic ballast will also have a starter. Switch on the LED tube light and check if it is working. For a ceiling fixture, make sure that you connect up the ground wire to preferably a dedicated ground screw (a small green screw usually marked GND) or if there is none, to one of the ballast mounting screws. Keystone ballasts are burned-in at the factory to ensure both exceptional performance and superior reliability. Now, strip out the colored insulation covering of the remaining wires. I've replaced the tube but it still only lights at the end as if the starter has died. Go to your breaker box and turn off the power for the area you’ll be working on. Remove the case, lamp, and any cover that prevents you from reaching the ballast. Detach the wire nuts that hold the wires from the ballast to the ones from the ceiling by turning the wire nuts counterclockwise. Here is a guide that will help you understand the basics of the electrical wiring system. Connect the ballast common red wire to the yellow pair of lampholder common wires. Remove the fluorescent tube by giving it a half-turn until its pins align with the slots in the sockets. It is a thin metal box … ballasts and most instant-start ballasts do not heat the electrodes once the lamps are operating to reduce lighting system power. Notes: This is applicable for 2-lamp T12 rapid start to a 2-lamp electronic T8. There are several ways you can do this. Have searched all over but can't find answer. So, you only have to connect the input wires to one side of the output hot and neutral wires. If you have a starter which is a little plastic or metal can that has to be replaced occasionally in your fixture, then your fixture is warm start. 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