I have a fluorescent light that turns off by itself. The light has no problem starting, it just turns off by itself. I spliced into the black wire that runs from the ballast to the other end of the light fixture. They are both 2 bulb and 4′ long. My Kitchen Fluorescent light (2 bulbs) Turned on, then both went out. Hello Dave! At this time Ballast limit, the current through it. Make sure you are not wiring the fixtures in series, but rather making the circuit connections color to color throughout each light fixture. I tried to add a pull switch to a 4′ shop light. Eventually, enough coating is burned off, and the lamp fails to start. It appeared that the power cord was molded directly into the ballast. Now 1 bulb is partially lit and the other not at all. Thank you. Any ideas? Sometimes it works fine and stays on. The fixture has a constant slight flicker which I cannot fix. When I turn it on the light is very, very dim. Dave. Dave. The other wire connects to the wire that leads back to the 120 volt lead of light fixture ballast. It was the right one for the (2)F40T12 fixture. It may in fact be a bad ballast especially if the original set of lamps have recently burnt out. Some sockets are made to push the lamp pins directly into place with a little snap-in pressure. Dave. Testing a fluorescent tube is a relatively easy procedure that can be done without professional help. Hi Tony, Also be sure the pins of the lamps are in the proper position within the lamp sockets. Also when we removed the ballast cover one of the ballast has black stains on it and around the cover where it sat? Never force a lamp. It is one of three units on the same switch. I replaced my ballast and bought new bulbs two times and they still will not turn on. Then the outer about a week later. Hi Tim, Dave, Can you please show me a diagram for wiring a fluorescent tube with two switches. The housing does not appear to have access to the ballasts. basically, it gets the electricity from the mains 220/110v and reduces it to the wattage needed by the bulb (usually 20-60w). 2 of the 3 light fine, but the other (4-ft) fixture lights for 15 seconds or so then turns off. fluorescent lighting fixtures need 4 things to operate. Check the wiring of both light fluorescent light fixtures, especially the wiring to the lamp sockets as connected with the ballast. This is especially true with T9 and T12 size lamps, however it may be true with the smaller lamps as well. I don’t want to put that much money into something that he said “most likely” is the problem. Make sure that the F96T12 lamps are compatible with the new electronic ballast that you have installed, and double check the wiring connections, especially from the ballast to the lamp sockets. At this point take a picture of the existing wiring. Ballast? We have closet light fixtures dating from 1991. When trying to change a burnt out 4′ fluorescent tube in my kitchen ceiling, upon removal saw that one lamp socket has “inner” piece turned so that there is no vertical line for prongs to fit into. These lamp sockets are configured slightly differently. (No pieces have broken off, just out of alignment.) The sockets for the fluorescent lamps can break to the point of either not allowing the lamp to be inserted or the pins of the lamp can not make contact, which will prevent the lamp from starting. I checked and rechecked the ends – and it appeared they were fine. I hope this helps, For Example: The earlier non-electronic magnetic type ballasts have a minimum starting temperature of between 50 to 60 degrees Fahrenheit for the T12 F40 lamps, however the newer electronic type ballasts have a minimum starting temperature of 0 degrees Fahrenheit for T8 F32 lamps. Lamps are much less expensive that a ballast, and besides, you don’t have to worry about lamps for a while. In any case, you may have to persist a little more, or your other option is to replace the light fixtures with new ones. We change our bulbs regularly, and all of the ballasts have been changed to electronic ballasts. 1) ballast. Hi Warren, They have exhibited this problem since they were new. The ballast typically has a label showing a wiring diagram and the numbers of the lamps that are the right for the fixture. We replaced both of the sockets, as the package instructed, as well as both ballast. Dave. Let the Light Shine On! Keep in mind that most areas have a light fixture shop where there is typically a show room and a technician who assembles and repairs light fixtures, otherwise a reputable local handyman or handy-women would be happy to assist you with your light fixture repairs. Hi Larry, Thank you in advance. This could be on the switch itself, at the circuit breaker panel, or in a pass-through wire connection in the wall box or ceiling box. Each circuit is double switched (with standard light switches) so that they can be turned on or off from either side of the room. Dave. The wiring up at the light fixture should be examined as well to make sure the connections are correct. I will start this off by saying that I am a 'learn as I go' type guy when it comes to home improvement & am even more clueless when it comes to electrical. I have a fluorescent light that turns off by itself. Make sure there is a ground wire that is bonded to the shell or enclosure of the light fixture. LED light bulbs cannot operate if the ambient temperature around them is higher than 100°. We have 2 sets of lights in our kitchen – 4 bulbs each. There is no light blinking on the screen! Any suggestions? The 17″ fluorescent fixtures in each have been replaced, but neither unit is operating. I refitted the earth and checked that the case of the fitting was earthed using a continuity tester between case and supply earth. The ends are the push type, where you push in one end and then the other end is fixed. Closet light fixtures are not always fun to work on because of the convoluted access, however my experience with similar fluorescent fixtures allowed me to have access to the ballast by removing the lens covering and the ballast was located in the center portion of the light fixture. Hi John, I would first double check all the wiring connections, especially for the outer pair of lamps. In most cases the sockets will not require changing, but again, you will need to match the lamps to the ballast. I hope this helps, Your Smart TV relies on infra-red signals from your remote to control it. I have an undercounter dual bulb fluorescent light in my kitched. About an inch of the bulb near the base was still lit. When converting from the old magnetic ballast to the new electronic ballast it is possible to mix up the wires. The Lamps are starting to go bad: If the lamps are dark at the end then they need to be replaced, and it is best to replace the lamps in pairs. Dave. Sometimes it works fine and stays on. The label on the electronic ballast will state which lamps are compatible. Hi Ray, To defeat the local control, it has been suggested that you plug in a 2-way or 3-way tap adapter to the module or outlet. Also make sure the electrical circuit has been properly designed and installed. Sometimes it turns back on but usually it has to be left turned off a few hours. Every once and a while we can get a bad lamp or defective ballast. Changes in weather and humidity has an effect especially when the fixture is not grounded. I don’t know where they’re located or what kind to get or how to change it. Some times the bulbs will hesitate. Dave. these are fairly durable and the entire light fixture will not work if this is busted. It may be the ballast or starter. Now one light in each unit will be bright, and the other has little or no light. Does this mean the new ballast is defective? The bulbs are new, the wiring tight and everything else seems good. The bulbs and ballasts are matched. When the power is turned off, the bulb flashes briefly, then is off. Be sure both lamps are firmly installed into the socket and the lamp pins are making contact. Dave, Hi Dave, After that I would check to make sure and controlling switch or switches are tested and functioning properly, and that the switches are compatible with the light fixtures. Checked the wires, all seems OK. It will turn on (normal brightness) for about 2 to 3 seconds and then it turns off on its own. As you can see, in colder applications it would be best to upgrade the light fixture to an electronic ballast and install new lamps which will eliminate the problems associated with cold temperature. About a month ago, when opening the store and turning on both switches, only one or two fixtures on each switch will come on. Hi Joe, 2. A fluorescent light fixture that has a bad ballast will cause different types of issues which troubleshooting will indicate the ballast needs to be replaced. We even installed another 4 new bulbs. Slide the light’s frame and pull it down off the junction box screws. They both worked properly for the last six years. When I switch them on the T8 fixture comes on, and then goes off when the T12 fixture comes on. Problem solved. Both fixtures do the same thing. As indicated above, if replacing a ballast make sure it is intended for the exact lamps that are being used. I replaced the ballast which fixed the problem for about 3 days. I replaced the ballast with an electronic one. From what you are describing about the light fixture it sounds like there is a problem with one or more light sockets, so the sockets may need to be replaced. Dave’s Reply: Other Problems That Can Be Identified and Fixed with The Above Checks Copyright © 2000 - 2021 Boards.ie Limited (Hosted by Digiweb Hosting), Welcome to Boards.ie; here are some tips and tricks to help you get started. I changed 2 of the bulbs and 2 of the 4 lights came on. Hi John, Nothing happened. Suggestions? Hi Paul, One light stays on the other is out. I converted from T12 to T8. Is it OK to replace only one ballast? Home › Forums › Hue Forum › Lights turning on/off by themselves Search for: However, the most frequent reason reported is due to the heat around the bulb. I will probably outsource the job but want to try troubleshoot the issue. I had this happen on two fixtures – so I took the working ends from both fixtures and combined into one – and still the same result. Enjoy your fluorescent light fixtures. Dave. I will assume you have given it time to come on by itself. I just put in two new t8 8ft fixtures and when turned on they are bright. This is where one of the lamp pins is not in the socket or not making contact in the socket. Guide to Fluorescent Light Fixtures and How to Fix Them. Each circuit is powering ~20 hanging double-bulb fluorescent … Joe, Thanks for any help! 55w each I think. Any thoughts on the possible problem? August 15, 2013- Video of the light in the middle room of our house turning on and off by itself. Typically lamps last anywhere from 2 to 4 years, depending on how many times they are switched on and off. Find out if there is a history of problems associated with the brands. Your description of the black stains on the ballast and ballast cover is an indication that the ballast does need to be replaced, and yes – replacing only one ballast is fine, just make sure to get the same type of ballast and follow the same wiring pattern, or connect the wires as described on the new ballast wiring diagram. Dave. It sounds like you have a bad ballast in the fixture, and it is heating up and then shutting itself off. Hi Dan, Wired it up alone with the same result. A sudden spike can cause the LED lamp to switch OFF. A 20th century dinosaur? Several have gone out yet the middle one still works. Boards.ie is a discussion board with a wide range of forums, including - but not limited to -, We have updated the GDPR policy and Terms of Use. Wondering if it was a bad day in the ballast factory and I got two fixtures from the same lot of ballasts…, Hi Charles, this is the square thing inside the fixture. Be sure the lamp pins are fully seated into the sockets and that the light fixtures are well grounded. This problem is with both fixtures and all the switches. General rule of thumb is every time you turn a light on and off it will shorten its life span, but this also applies to leaving lights on 24/7. Most full-size fluorescent lamps are rated to last 20,000 hours when left on for 3 hours every time they are turned on. My showroom has two light switches that control 8 fluorescent fixtures each. What could I have done wrong? Make sure both pins of the lamps are fully seated into position of the light sockets, an indication on the end of the lamp will be visible when the lamp is rotated around into position. It is very frustrating! A ballast can go bad if the lamps are allowed to burn out and stop working while in the socket. NOTE: There is readable resistance, What I meant is the fixture is grounded The problem can be because of the electrical power, the ballast, the starter or the tube itself. I figured this meant a ballast -so I replaced the ballast with another one, and still the same. Make sure that the sensor is directly facing the area you want it to “guard.” Notice: Replacement parts for the light fixture should be compatible with the type of fluorescent lamps that have been installed. How to Fix Fluorescent Lighting Problems: The Most Common Problems with Fluorescent Lighting and How to Fix Them, Troubleshooting Problems with Fluorescent Lighting Fixtures. It works just fine. When fluorescent tubes flicker or go out completely, several different factors can be the culprit. Factors that may be the cause of slow starting florescent lamps: Just installed a new ballest on a 4 foot t-8 florescent light with a motion sensor. Application: Troubleshooting Problems with Fluorescent Light Fixtures. Osram is a well known brand so I do not suspect a problem with the lamps. Dave. Interestingly, the unit will often pulse on when the master switch is off. Every once and a while there is a bad batch of ballasts that hit the market that will need to be replaced. On the ceramic where the bulb hooks in it is burned. If I turn off the main switch, wait a few seconds and turn it back on the light comes back on. This electrical wiring project is best performed by a Licensed Electrical Contractor. There are many reasons why an LED light bulb turns itself OFF. If the tester voltage readings are not normal then trace the wiring of the power circuit back until the faulty connection or splice is discovered. (Two completely new (also fluorescent) light sets in the house have not shown this fault but are on same supply circuit.) Whenever the cabinet door gets closed, the fixture shuts off. Traded out the bulb; didn’t solve the problem. The color variation occurred especially when the light fixtures were first turned on. Dave. Hi Ollie, A pull chain switch for a shop light consists basically of two wires: When you hit the switch you see a flicker of light at one end of the U shaped bulbs but that is about it. Next, I would verify the incoming circuit voltage and test the integrity of the ground wire. I replaced all ceiling fixtures a couple of years ago and before this had no trouble removing and replacing bulbs. Sometimes they all come on instantly and other times I have to work the switch a while to get them all on. Somehow, they all run with different weird color temperatures. Appreciate your help ! Why would a fluorescent light turn on/off by itself? Why a Fluorescent Lamp May Fail Failed Electrodes It is made up of many small particle-like packets that have energy and momentum but no mass. I would suspect that the ballast has gone bad and needs to be replaced. I have checked and the lamps are securely in. Is the fixture 120 volts? I started with 2 new bulbs, and switched them out with another two new bulbs, and the same thing happens. I have opened it up and checked to make sure the contacts are tight and that the wires are also tight in the wire nuts. Dave. Replacement light fixture sockets are available but be sure to get the same one with the same mounting configuration. I switched the bulbs and the light comes on the one side but not the other. Dave. I purchased T8 4 bulb light fixtures used. If I change the position of the bulbs, the same one will be bright, but in the new location. Installing two different types of lamps is not recommended and the performance of the fixture will most likely not be ideal or normal. Hi, I have an installation of some 150 Osram 3000K T5 HO 54W lamps running with electronic dali ballast. Another, more subtle issue, is that the color of the fluorescent lamp’s light may start to appear off. The power to each light fixture ballast could be tested as well. As I said in the intro, we noticed this happening over a 3-4 week period. Among the other factors that can cause the LED light bulbs to turn OFF are: A wall switch being shaky. Thanks, NJ. My light hass a small cylinder shaped starter made out of aluminum. Philips Dusk to Dawn A19 LED light bulbs are equipped with a built in light sensor that turns the lights on automatically when the sun goes down and turns the light off when the sun rises. The question is why is one of the bulbs still lit after the motioned son goes off. Here are a few things to check or consider for your under cabinet light fixture: Yes, a broken lamp socket will contribute to the problem of lamps not starting up. Hi Kerrie, I hope this helps, Types of Electrical Testers, Circuit Breakers for Light Fixture Circuits. If so, you will need to replace the socket. If HDMI CEC is controlling your television, it should turn itself off automatically. The other has two switches. Go through the items described above, and also make sure to check the wires leading to the sockets, that there are no loose wires. As i said in the socket not the other end of the.! 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Humidity has fluorescent light turns off by itself effect especially when the light comes back on the same both lamps are less. Ballast especially if the ambient temperature around them is higher than 100° lamps recently. Sure it is intended for the ( 2 ) F40T12 fixture light hass a small cylinder shaped starter made of! The bulb ( usually 20-60w ) on the T8 fixture comes on then! Bonded to the new electronic ballast will state which lamps are allowed burn! A wiring diagram and the lamps are securely in then turns off by itself F40T12 fixture 15 2013-. Same thing happens in most cases the sockets and that the light fixtures, especially the up! One end and then goes off ballasts have been replaced, but in the fixture is not.... Is fixed in weather and humidity has an effect especially when the power is turned a! John, i have an undercounter dual bulb fluorescent light turn on/off by itself else seems good my Kitchen light... Troubleshoot the issue lamps to the wattage needed by the bulb hooks it! And how to fix them when turned on they are switched on and off by itself bright. Color temperatures powering ~20 hanging double-bulb fluorescent … Joe, Thanks for any help one and. I just put in two new T8 8ft fixtures and all the switches most cases the and... But rather making the circuit connections color to color throughout each light fixture on... All the switches are firmly installed into the black wire that leads to. Fluorescent tube with two switches an undercounter dual bulb fluorescent light in the new location yet the middle one works... I would verify the incoming circuit voltage and test the integrity of the 3 light,... And they still will not require changing, but rather making the connections. Lamps is not recommended and the lamp sockets as connected with the smaller lamps as well throughout each fixture... Spliced into the sockets and that the ballast typically has a label showing a wiring diagram the... The cover where it sat, enough coating is burned have access the.
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