Questions tagged [fluorescent]

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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 ...
3 votes
4 answers
466 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 ...
0 votes
1 answer
92 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 ...
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3 votes
2 answers
101 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, ...
  • 141
5 votes
1 answer
345 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 ...
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0 votes
1 answer
52 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 ...
0 votes
2 answers
102 views

How can I tell whether a fluorescent tube has failed, or an electronic ballast?

The light fitting in my utility room is a 5' fluorescent tube, and it's stopped working. It's about 7 years old, with a quick starting electronic ballast. The failure has been a little odd - a ...
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1 vote
1 answer
86 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?
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7 votes
5 answers
2k views

Do T9 fluorescent light bulbs last longer if they are left on? [closed]

Do fluorescent lights last longer if they are left on? I had a boss who said this, and I was wondering if it is really true. I would rather replace them with non-fluorescent, but the fixture doesn't ...
5 votes
3 answers
3k views

Pull string on fluorescent light broke

The pull string on my fluorescent light snapped off. Below is the image of the fluorescent light fixture and the cord used to come out of round section on the side. Does anyone know if this can be ...
-1 votes
1 answer
93 views

same-sized alternatives to F14T12 bulb

I have two bathroom light fixtures with very old magnetic ballasts and F14T12 fluorescent bulbs. These are, of course, a 1.5-inch diameter. I've been doing some bathroom renovations and I thought this ...
0 votes
0 answers
29 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 ...
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0 votes
1 answer
621 views

How to release tombstone wire without cutting? And why won't it turn?

Small light with T8 bulb. Tombstone was almost impossible to twist to get the bulb out. Why? Can the wires be removed from this style without cutting them? Tried poking small flat screwdriver around. ...
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1 vote
3 answers
2k views

Fluorescent lamp does not rotate in socket

I need to replace two fluorescent lamps in my bathroom and neither of them would rotate in their sockets. I can twist them maybe 10 degrees or so but after that they completely stop moving. It's the ...
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0 votes
1 answer
112 views

Will a feed through on and off switch work with a fluorescent light?

We have a fluorescent light mounted above the kitchen sink. The on/off switch is on the light fixture and it's hard to reach. Will a feed through on and off switch work with a fluorescent light?
1 vote
1 answer
67 views

Fluorescent lamp issues

We have a couple of old fluorescent fixtures in our basement, each holding four 4-ft long T12 bulbs. After several weeks of slow starts, the lights finally stopped coming on in one of them so while we ...
0 votes
1 answer
27 views

HO fluorescents not working after switching with power on

I’m curious as to why after replacing T12 HO bulbs they don’t come on if power was on when replacing. I come back hours later and they are finally on. Replace with power off and they work right away. ...
0 votes
2 answers
337 views

How do you open this fluorescent light fixture?

The blubs have flickered and gone out on this light in my kitchen. How can I open this fixture? I have taken one of the plates off but I wasn't sure is that was the right place to look. I heard a lot ...
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0 votes
1 answer
256 views

How to remove this fluorescent lamp from its fixture

tl/dr: I can't find how to release the lamp from the fixture. Not spring-loaded Non rotating I can't find a way to remove the sides I have a fluorescent lamp in my bathroom which lights up about 2 ...
  • 3
1 vote
2 answers
52 views

Can I replace 15 amp spiral CFL lights in garage with fluorescent lights?

1978 house. Garage has two crappy spiral CFL ceiling lights on 15amp ciruit, horrible lighting in cool spectrum. Can I replace them with big fluorescent or led shop lights? I need to better lighting ...
3 votes
1 answer
1k views

LED T8 tubes overheating?

Last fall (around mid-October), I installed two LED tube lights in a fluorescent fixture--since there were three lights total, it had two LEDs and one fluorescent bulb. A few days ago, I started ...
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1 vote
2 answers
470 views

How to insert bulb in this fluorescent socket?

I hope someone can advise me. I'm trying to insert an F40 bulb (1.5" diameter, 4' long) into the socket shown below. With every other fluorescent socket in my home, I simply orient the two bulb pins ...
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5 votes
1 answer
2k views

Why does this fluorescent ceiling light go out after a few seconds (every time)?

I have a strange problem with a fluorescent ceiling room light. There are four small fluorescent tubes. One day for no apparent reason they all just suddenly went out. When I turned the light switch ...
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1 vote
1 answer
78 views

Fluorescent light only flickers when I turn it off

My fluorescent light shows no sign of life when I turn on the light switch, but will flash on one end when I am turning off the light. I've checked the ends.
2 votes
2 answers
754 views

I broke a CFL lightbulb while unscrewing it, do I need to throw away the clothes I was wearing? [closed]

I was unscrewing a compact fluorescent lightbulb this morning and it broke while it was unscrewing it. A few chunks of glass showered down, but the entire bulb didn't shatter; ultimately a few chunks ...
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 ...
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2 votes
2 answers
93 views

What kind of compact fluorescent light bulb fixture is this?

I have search quite a bit to find what kind of compact fluorescent light bulb I need for this recessed can light? It is in a bathroom above a tub. I have include a picture of the base looking into ...
3 votes
2 answers
8k views

Replaced fluorescent tubes with LED tubes, the LEDs only turn on when tapped

I bought FEIT replacement LED tubes at Costco, item number T48/840/LED/2, and swapped them in for fluorescent tubes (the thinner style). When I switch them on, the pairs of LEDs barely illuminate. ...
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2 votes
2 answers
115 views

Option for some light between broken fluorescent lights and new LED recessed lights

I'm working to fix our our basement - nothing top of the line / dream basement - just some nice enough upgrades relative to our 1970's wood paneled basement, to enjoy a few years before we sell the ...
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1 vote
1 answer
2k 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 ...
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1 vote
2 answers
146 views

Two socket fluorescent lamp OFF switch hot / not working with single bulb

I have a two-socket fluorescent lamp. Initially only one light tube was inserted and it worked fine. At some point, it started to go off seconds after being turned on. I thought the tube went bad, so ...
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1 vote
2 answers
268 views

Fluorescent light fixture malfunction

A fluorescent light fixture in my house looks like the attached picture when I turn it on. I replaced the light tube, but no success. If I repeatedly turn it off and then on quickly, it eventually ...
3 votes
1 answer
99 views

Replace fluorescent lights with LED lights

Can I replace fluorescent lights (30W, 36" long - F30T12 H998) with LED lights?
0 votes
2 answers
204 views

fluorescent lamp messing with voltage in the house

I got a cool lamp from a yard sale, its an arm mounted desk lamp that has a giant magnifying lens in the head and a circular fluorescent tube around it so its really nice for zooming in and ...
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1 vote
2 answers
2k 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 ...
  • 111
2 votes
2 answers
363 views

Why does it take 20-30 seconds for a fluorescent tube to start?

One of the fluorescent lights in my apartment does nothing for long seconds or sometimes even minutes when turned on (then it surprises me when it suddenly comes on). It behaves as if there were some ...
3 votes
3 answers
754 views

Name for light fixture tube socket (tombstone) retainers?

What are the names of the metal photographed parts? The tombstones are inserted to clarify function. I would like to order more of these metal parts, however, I do not know the terminology to Google ...
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1 vote
2 answers
2k 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?
  • 2,800
2 votes
2 answers
2k views

How to remove cables from the Philips ballast for fluorescent lamps?

I have a few HF-Performer III TL5 ballasts to to which I connected cables in past. Now I can't take them out http://www.lighting.philips.com/main/prof/lighting-electronics/fluorescent/fluorescent-...
1 vote
2 answers
2k views

Fluorescent bulb shelf life

What is the expectation for unused fluorescent bulbs that are 1 year, 5 year and 10 years old? In general, do fluorescent bulbs appreciably degrade over the first 10 years? I am referring to tubes ...
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0 votes
1 answer
678 views

Can you wire a T12 fluorescent Strip light and a T8 fluorescent strip light together?

I have a 2FT Strip light and a 4FT strip light wired together in the kitchen. They are both T12 . I need to replace the 4FT one and I bought a cheap T12. However, I have to go back to the store ...
1 vote
1 answer
85 views

Systematic process to find replacement fluorescent T5 lamp holder

The goal is to replace a plastic T5 tombstones has melted. The side 'wings' fold-in so it can be 'dropped-into' the fixture. There are approximately 100+ tombstones and one has melted. Is ...
  • 2,800
1 vote
2 answers
3k views

Why do fluorescent lighting tombstones melt?

I am fixing the lighting in an older building and one of the plastic tombstones has melted. There are approximately 100+ tombstones and one has melted. A search found a forum discussion that ...
  • 2,800
4 votes
1 answer
12k 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 ...
  • 201
4 votes
5 answers
2k views

Measuring frequency of a fluorescent light source?

I noticed that my eyes feel tired with certain fluorescent lights in my office. I read that low frequency fluorescent lights can make eyes tired. Is there a tool I can purchase to measure the ...
  • 141
1 vote
3 answers
8k views

I replaced my fluorescent light ballast but the bulbs turn off immediately

I changed the ballast on the florescent lights in the laundry room yesterday. Now this morning when I throw the switch they turn on then off immediately. Is this a loose wire connection? Should I go ...
0 votes
1 answer
3k 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 ...
  • 145
1 vote
2 answers
2k views

Removing a surface-mounted shop light

In my garage, I have some surface-mounted (or flush-mounted) fluorescent shop lights. I would like to replace them with LED shop lights, instead. They are just plug-in lights, so the electrical part ...
  • 225
3 votes
6 answers
9k views

How do I get the fluorescent bulb out of this fixture?

The bulb blew last night. I've been trying to get it out to change the bulb but it's not budging. I got the outer case off but the end covers aren't budging so the bulb won't pull or twist out. How ...
1 vote
0 answers
212 views

Can an F40T8 4ft ballast power an F36T8 2ft bulb?

I have some F36T8 2ft bulbs that I need to power, unfortunately the closest ballast I can locally find are rated for 4ft F40T8 bulbs. Can I still use them, or will it be a hazard?
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