Fluorescent tube start difficultly


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Old 09-23-23, 06:59 PM
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Fluorescent tube start difficultly

My kitchen ceiling has a fluorescent tube (4 tubes) for lighting. Recently, turn on the tubes, has some difficulty. Sometimes, turn on the switch, it should wait 20-30 minutes to let tube light on;sometimes, I have to rotate one tube to light on. If the fluorescent tube is lighting on already, then turn OFF several hours, it is fine when switch ON again, but OFF time can not over ~6 hours. What is the problem? Is the starter needs be replaced? My room temperature is 65 -70F. Thanks
 
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Old 09-23-23, 07:38 PM
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It may be time for new ballasts and fresh lamps, and possibly new lamp holders too. Old fluorescent ballasts and lamps, as well as lamp holders, can become real finicky.
 
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Old 09-23-23, 07:54 PM
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If it is a 4' fluorescent fixture and it needs a new ballast it might be a better option to just convert the fixture to LED direct drive lamps and bypass the ballast. Rarely do lamp holders need to be replaced unless they are damaged.

Is this a T12 (1 1/2" diameter lamps) or a T8 (1" diameter lamps) fixture?
 
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Old 09-24-23, 01:28 AM
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Years ago I stopped repairing fluorescent lights. You can buy LED conversion bulbs that will work with your existing ballast. Unfortunately when your ballast completely dies you'll have to do another repair. A better solution is to remove the ballast altogether and use line powered LED bulbs. There are already several threads here how to make the conversion (remove the ballast) or we can help you out if you have questions but many bulbs come with the instructions.
 
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Old 09-24-23, 04:14 AM
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I would also remove the ballast and change to LED's. It might also be a good idea to spend a little more and get dimmable bulbs so you can regulate the ;light output.
 
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Old 09-24-23, 04:29 PM
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are you talking normal LED lamp as shown in the picture or some special? Could you please show the threads which make the conversion (remove ballast)?

What stuff I should have/buy before do the conversion. I need your helps. Simple is better.
Thanks
 
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Old 09-24-23, 04:39 PM
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Please post a picture of the existing fixture.
 
CircuitBreaker voted this post useful.
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Old 09-26-23, 08:05 PM
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{1} please see attached pictures of fixture.
(2) my current lamps are 4 tubes of T12 48". May I use this fixture to install two tubes of LED T8 48" tube (or I have to install 4)? Using LED T8 still need ballast?
(3) Somebody suggests removing ballast to install LED lamp, how does it works?
(4) May I add conversion adapter to install normal LED bulb (as last picture) using current fixture? The question is each tube has two sockets, if set one normal lamp for each tube, how to process? Under such case, do I need remove ballast or just don't care the existence of ballast.

Thanks

 

Last edited by wen831; 09-26-23 at 09:11 PM.
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Old 09-27-23, 08:42 AM
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I get a box of LED T8 48" bulbs, because T12 is not produced anymore. It is told that T8 could replace T12 with T12 fixture, is it true?
As described in the box, it is compatible to most ballasts. So, it looks like changing to LED, still need new ballast, the old T12 ballast still could work for T8 (technically, it should be, because T12 has more power)? May I bypass ballast?


 

Last edited by wen831; 09-27-23 at 09:12 AM.
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Old 09-27-23, 04:30 PM
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Those lamps are not direct drive and rely on a ballast for function. It is doubtful that they are compatible with the existing T12 ballasts. Also, your issue sounds like the ballasts are failing anyway so this is a good time to remove them and convert the light to LED direct drive lamps. I should also mention that the lamps you bought are "daylight" which they list at 6500K. That will be a VERY blue light that is often not a very pleasing light in a home for general illumination.

Since I see you are shopping at Lowes. Here are some lamps that would work as bypass lamps: https://www.lowes.com/pd/GE/5013820993 These lamps will require rewiring the light and removing the ballast but it is not difficult to do if you are mechanically inclined. These are color selectable from 4000K, 5000K, and 6500K. In a home, I would recommend not going over 5000K for general lighting.

As another option, these ones at the big orange store near you are 25% cheaper and go down to 3000K https://www.homedepot.com/p/Feit-Ele...037737#overlay Again, the ballasts must be removed and the sockets directly wired.
 
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Old 09-27-23, 07:21 PM
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Do I need buy dual ends or single end? I bought the house 25 years ago, and never changed the fixture,
 
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Old 09-27-23, 07:35 PM
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The lamps will have pins on both ends. For some lamps, you only connect the wires to one end (Must be non-shunted sockets) other lamps you connect the hot to one end and the neutral to the other. There are even some lamps that can do both. (Note: since your fixture uses T12 lamps the sockets will be non-shunted)

The two lamps I linked I am not sure how they wire, you will have to look at the wiring diagram to see what is required.
 
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Old 09-28-23, 08:07 AM
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T12 fixture is non-shunted socket, and T8 is shunted, what else I should have at least except buying T8 B lamps?
I see T8 lamp is dual ends.
 
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Old 09-28-23, 07:17 PM
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The duel ends typically means that you connect one end to the hot and the other to the neutral. This method can be wired with any fixture that takes straight lamps. (Not round)
 
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Old 09-29-23, 10:20 AM
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this comes from Lows 5013820993 T8B installation figures. In step 3-7 picture, does left two pictures show non-shunted sockets circuit, 3rd one is with ballast and 4th one is direct connection for non-shunted socket? Or no one is non-shunted circuit?
What is the function for 1A fuse in the circuit for, and is it enough for T8 supply?
Thanks

 
 

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