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Questions tagged [ballast]

Use this tag for questions about ballasts used with fluorescent or other types of discharge lighting.

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new fluorescent bulb + starter not working (but also power outlets) could be the resistance? [closed]

I just replaced the fluorescent bulb and the starter (but not yet the ballast, see question) before going ahead I noticed that also the electric outlets don't work I changed the fuses with no result, ...
Francesco Iapicca's user avatar
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56 views

Is 163°F for my new fluorescent ballast too hot?

My neighbor who is a master electrician recently installed a new ballast for my fluorescent light fixture. On a whim, I just decided to inspect the work when I felt the light cover was a little warm. ...
Randy Scull's user avatar
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1 answer
57 views

Ballast Bypass arcing with power off

I’m in the middle of replacing a bunch of fluorescent Tubes with LED And bypassing the ballast. Everything was going great, but in one room with the power off (at the switch, not the breaker), after I’...
Jason M.'s user avatar
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1 answer
75 views

I couldnt find this at Home Depot. What should I use to replace it? [closed]

Home Depot doesn't carry these. I am not familiar with these and have never replaced one. Seems pretty easy to replace though. More concerned with brand and quality. I am not sure if I should buy the ...
amrog's user avatar
  • 347
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0 answers
22 views

One Fluorescent Fitting not working in parallel

I know it's not the bulb or the ballast (it's a starterless ballast), I've swapped bulbs to a different unit in same circuit, the bulb works in both of them but both don't work at the same time, I've ...
Greg Devenney's user avatar
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2 answers
115 views

Ballast wiring for 4 tube lights?

I have 347V Ballast wired. See attached the existing wiring and the one specified on the Ballast itself. Experienced & Experts, please comment: Would it still work? For my knowledge, Are the ...
Rob2023's user avatar
1 vote
1 answer
562 views

I’m having trouble with led tube lights replacing fluorescent tubes and still using ballasts

I replaced the old fluorescent tube bulbs with Phillips led tube lights a couple of years ago and have had problems ever since. The bulbs would turn off when they warmed up and turn back on when they ...
Randall Martin's user avatar
0 votes
2 answers
210 views

I'm wanting to do a ballast bypass on an old single bulb T12 light fixture, but the wiring is different from what I've encountered in how-to videos

I'm wanting to do a ballast bypass in this ancient fluorescent fixture with a magnetic ballast in my laundry closet. It has a single bulb and is easy to access, so I thought it would be a good one to ...
Nick's user avatar
  • 11
3 votes
2 answers
1k views

Do I need to install a junction box before installing a LED strip light fixture?

I would like to replace 15 year old Fluorescent 4 foot strip light fixture (electric ballast, T8, two light, 32W), it looked like this. This is in a closet ceiling. I was a bit surprised that when I ...
Tom Broome's user avatar
1 vote
2 answers
110 views

Is there an easy way to find out if a ballast is working?

I changed the bulb of a fluorescent light but it does not turn on. So, my first assumption is that the ballast has died. Is there any other way I can test the ballast? I am wondering perhaps the issue ...
Maesumi's user avatar
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1 answer
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Would anyone know how to fix only one of two T8 fluorescent tubes turning on?

There are two T8 fluorescent tubes and an electric T8 instant start ballast. All of the lamp holders are non-shunted. The T8 ballast has two blue wires and a red wire coming out of one side. I connect ...
Joe's user avatar
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2 votes
1 answer
414 views

How to tell if a fluorescent light gone bad or the switch

How can I tell if a light switch gone bad? It connects to two sets of fluorescent lights and neither one turns on. The lights have been on for two months and when turned off/on they do not come back ...
Maesumi's user avatar
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31 views

What behavior would I see if I connect a dimmable LED fixture to a fluorescent ballast?

I want to replace a fluorescent fixture with a dimmable LED fixture (standard LED, not fluorescent-replacement). I suspect the legacy ballast is hidden behind the drywall in the ceiling, but it's ...
sblom's user avatar
  • 151
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1 answer
695 views

dual-end powered ballast bypass with fixture that has a built in switch

I am attempting to do a ballast bypass for LED tube lights. The LED bulbs are dual-end powered with just one bulb per fixture. The pictures showed the wires I have at the ballast. The black wire on ...
onmyown's user avatar
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1 answer
336 views

Buzzing sounds from dimmable floor lamp

I have a floor lamp which is dimmable and has a box (ballast?) connected and controlling the brightness. It's making a loud buzzing sound when turned on. What can I do to fix it?
KubiK888's user avatar
  • 308
1 vote
2 answers
322 views

Removing and Replacing Flourescent Ballast

I went to flip the switch to turn on the overhead light in my kitchen recently, and there was a flash of light and it stopped working. I replaced the lamps, but it still won't turn on. Here's a ...
Tisch's user avatar
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1 vote
1 answer
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Is it safe to use a 32W LED bulb in a ballast with a max bulb wattage rating of 32W?

I'm wondering if running the ballast at its maximum rated output is safe. Is it necessary to provide it with some overhead by using a higher wattage ballast? Should I get, say, a 40W ballast for my ...
Robert M.'s user avatar
  • 111
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0 answers
508 views

Changed ballast on fluorescent light and now lights take 5 minutes or longer to turn on all the way

My fluorescent light in my kitchen stopped working so my husband replaced the ballast. Now they come on but so dim you can barely see and take 5 minutes or longer to come on all the way. When I got ...
Amanda Roberson's user avatar
2 votes
1 answer
436 views

What's the right way to bypass non-functional ballast in bathroom exhaust?

My home has Nutone 769RLN "B" unit exhaust fan with light on them (763RL/769RL "A" Unit). The lights contain ballasts and have a provision to use 13W CFL with a G24q-1 base. ...
Null's user avatar
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0 answers
161 views

How to select equivalent replacement ignitor for metal halide fixture?

Situation: I inherited 3 100W overhead fishing lights (metal halide with pulse start) and one of them died circuit doesn't have a capacitor, but has ignitor; bulb is marked with M90/E; fixture uses ...
C.M.'s user avatar
  • 101
3 votes
4 answers
974 views

T12, 4ea 4ft lamps, 2 old ballasts. It appears two of the lamps aren't coming on. Sometimes the fixture flickers

T12, 4ea 4ft lamps, 2 old ballasts in 20-year-old fixture. It appears two of the lamps aren't coming on. Sometimes the lamps flicker. The wooden frame is attractive, so I don't want to replace the ...
Steve Kohn's user avatar
0 votes
1 answer
828 views

Ballast replacement wiring assistance

I'm a homeowner replacing an old broken fluorescent light ballast and am not 100% sure about the wiring since the number of wires and the colours have changed. Can someone confirm that my plan is ...
MarcGuay's user avatar
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0 answers
514 views

Fluorescent To LED Tube Swab - Only One Side Works

I have old 4ft fluorescent fixtures in the basement (about 10 years). They are the NEW232120REBN from Lithonia. The T12s are dying out so I bought some Philips InstantFit 32W-equivalent T8 LED tubes. ...
opendatum's user avatar
3 votes
2 answers
491 views

Replacement fluorescent ballast issue - light keeps turning off

TL;DR I have replaced a ballast for a 2x70W T8 strip light. The light illuminates for <5 minutes before turning off. Flicking the light switch turns the light back on, again for <5 minutes, ...
woter324's user avatar
  • 176
5 votes
1 answer
779 views

Retrofit Fluorescent Tube Fixture with LED Tubes

I'm retrofitting the T8 fluorescent tube fixtures in my house with direct wire LED tubes. Essentially, the LED tubes come with drivers inside, so I have to remove the fluorescent lamp ballasts from ...
XYkik's user avatar
  • 83
0 votes
1 answer
179 views

I have several 4' fluorescent lamps (F40T12) and 8' fluorescent lamps (F96T12/DX) that need LED Replacements. HELP! [closed]

I am working on a job where I have several 4' fluorescent lamps (F40T12) and 8' fluorescent lamps (F96T12/DX) all from Phillips and the owners are wanting LED replacements for them. We don't know what ...
TheNewHomeOwner's user avatar
1 vote
1 answer
413 views

Are there LED lights that can work with a fluorescent ballast? [closed]

Are there LED (retrofit) lights that are compatible with a 120V 14W fluorescent ballast? Or does the ballast always have to be removed?
mr blint's user avatar
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1 answer
309 views

either fluorescent bulbs or ballast = bad?

I have been using these FC12 T9 Circline 32w fluorescent bulbs for many years. https://www.lowes.com/pd/GE-32-Watt-12-in-4-pin-Circline-4100-K-Cool-White-Circline-Fluorescent-Light-Bulb/3400530 The ...
Bob White's user avatar
1 vote
1 answer
166 views

Would these led bulbs cause a problem with this ballast?

A little over two years ago I replaced the 4 florescent bulbs in my overhead light fixture with 4 LED bulbs that I believed would work. The LEDs worked great with no problems at all. After about 2 ...
raddevus's user avatar
  • 475
0 votes
2 answers
553 views

Is this type of ballast compatible with drop-in LED tubes?

I'm mulling over replacing the old tubes in the garage with LEDs. However, I'm learning that if I want to do that without doing some re-wiring, it might depend on what type of ballast I have. I have ...
gammapoint's user avatar
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0 answers
42 views

Replacing a ballast

I replaced a ballast in a fluorescent fixture I put a new bulb in and it turned on. I put a second new bulb in and it didn’t turn on so i twisted the first bulb so it turned off. the second bulb that ...
Jay's user avatar
  • 1
0 votes
2 answers
1k views

Why does G23 energy-saving lamps need ballast, LED type as well?

IKEA Lival desktop lamp (like this) uses a huge adapter plugging into power-socket, which should be a ballast/transmitter. The lamp uses a G23 bulb from e.g. OSARAM DULUX S11 W. I feel it is very ...
Gustaf's user avatar
  • 13
0 votes
2 answers
1k views

What ballast should I use for a 90W low pressure sodium lamp?

I am building a monochromatic lamp with the use of a low pressure sodium (LPS) lamp. Through research I understood I need a specific ballast for such a bulb. The examples I found on the net feature a ...
Valerii Horomanschii's user avatar
0 votes
2 answers
7k views

T12 Fluorescent ballast bypass not working

I have a solid state electronic ballast that houses T12 Fluorescent tubes. Recently one of them burnt out and I want to change it to LED fluorescent tubes. I bought 2 Phillips universal fit tubes. I ...
Alex's user avatar
  • 113
3 votes
1 answer
99 views

Replaced bad ballast and maginfying light still won't work

I have a LUXO Magnifying lamp that after years the ballast finally went bad, checked the coil and it was open. Ordered one from Luxo same kind and specs, hooked it up and nothing, not even a hum. ...
Ron Powell's user avatar
0 votes
1 answer
144 views

Ballast failure replacement

NOTE: As someone gently told me, it's not neon tubes but fluorescent ones. So I let your replace it while reading it. I have a setup with two neons, in « U » shape, controlled by a ballast that has... ...
Simon Dugré's user avatar
1 vote
1 answer
103 views

Ballast + lamp. Putting all together

I would like to thank community for helping me with my initial questions regarding this project part I and part II. Finally, I put all the parts together and would like you to review it before I plug ...
Eugene's user avatar
  • 27
0 votes
0 answers
56 views

Whassup with this ceiling fixture?

40W Circline fluorescent would periodically light for less than a second, but stay on when tried an hour or so later. Replaced bulb; same problem. Replaced ballast; now it lights for only about a ...
Phlup's user avatar
  • 1
0 votes
3 answers
2k views

LED bulb replacement in Dusk-Dawn Outdoor 175W light

My old metal halide bulb finally died after 30 yrs use. Considering switch to LED corn bulb. However, the seller website states "Connects directly into E39 Mogul Bases. Just screw in. Please note that ...
peinal's user avatar
  • 1,271
0 votes
1 answer
5k views

Converting 2 lamp ballast to a one lamp

I am repairing my parents old single lamp (lamp F30T12-CW) ballast (old ballast was a GE 6G1075) with a two lamp ballast ( Phillips Advance B134SR120M-A) but only connecting one lamp The new ballast ...
Rick's user avatar
  • 1
1 vote
1 answer
3k views

Fluorescent lights sometimes don't turn on

I have two T12 double-ended G13 2-pin 4 foot fluorescent lights in my bathroom. They often (maybe 1/3 of the time) won't turn on, with a very slight glow in one corner, then usually turn on after an ...
Georg's user avatar
  • 13
1 vote
2 answers
4k views

Fluorescent Lights Turning on Slowly

I have a Philips fluorescent light fixture in my kitchen. It was installed in the mid-1990s, so it uses an electronic fast-start ballast. The lights were not turning on at all, so I replaced the ...
GTS Joe's user avatar
  • 121
0 votes
2 answers
1k views

8 Foot T12 Flourescent ballast Requirements

I would like to understand how to evaluate a ballast and determine if it is suitable for a T12 8 foot flourescent bulb. What is the process / questions to ask? I have several known good working ...
gatorback's user avatar
  • 3,088
0 votes
2 answers
85 views

A cornucopia of doubts on ballasts?

I want to buy and use some 54W T5 lamps. I have found some ballasts in a nearby shop. I have the following questions: One of them advises 1x110W T10/T12 or 1X85W T12. Can I use it on two 54W T5 lamps?...
Red Banana's user avatar
1 vote
2 answers
4k views

Can a T8 bulb work with a T5 ballast?

What (if any problems) will happen if a T8 bulbs are used with T5 ballasts?
gatorback's user avatar
  • 3,088
0 votes
1 answer
1k views

T5 bulbs with T8 Ballasts

Can 4 ft T5 bulbs be used with T8 ballasts? Why?
gatorback's user avatar
  • 3,088
0 votes
1 answer
509 views

Should the ballast be replaced?

As a follow-on question to: Why fluorescent lighting tombstones melt? I do not know what caused a massive current to melt the tombstone: was it the ballast? The MELTED tombstone will be replaced, ...
gatorback's user avatar
  • 3,088
5 votes
1 answer
19k views

what is the likely cause of a single fluorescent tube not working in a light fixture with a ballast that supports two tubes?

So I've got a warehouse with many fluorescent tube fixtures. We are slowly transitioning piecemeal to LED as we run out of replacement ballasts and bulbs. I've got a fairly simple troubleshooting ...
Daniel's user avatar
  • 211
0 votes
1 answer
4k views

laundry room fluorescent lights dim and flickering

Starting about a week ago, the fluorescent lights in my laundry room became dim and flickering. I bought two tubes from lowes (F40KB-ECO 48", I don't think that's relevant but anyway), put them on, ...
J.E.Y's user avatar
  • 281
0 votes
1 answer
4k views

How can I tell whether a fluorescent ballast is T8 or T12?

Is there a way to tell from a ballast's specifications (voltage, wattage, how many lamps it handles, etc.) whether it is a T8 or T12 ballast? Or do I need to look for the manufacturer's part number to ...
Erica's user avatar
  • 145