Questions tagged [fluorescent]

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1answer
28 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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2answers
36 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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1answer
2k views

How to safely wire fluorescent lighting with three prong plug on the ceiling?

Recently moved in to a new workspace with some very funky wiring. Basically, there is a flourescent light installed overhead with a three prong plug. That plug goes to a power strip also attached to ...
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2answers
42 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 ...
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1answer
708 views

How to bypass the ballast on this fluorescent fixture?

I have some fluorescent fixtures in my basement that I would like to convert to LED, using bulbs that require a ballast bypass. However, these fixtures don't have a centrally mounted "black box" ...
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4answers
15k views

How do I choose the correct fluorescent ballast?

I have a fluorescent fixture which takes tubes. The fluorescent ballast has gone bad, or I want to upgrade to the latest. How do I select the correct ballast for my fixture?
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0answers
59 views

How to remove fluorescent bulb from a stuck rotary lock socket?

I'm trying to change a fluorescent bulb but it gets stuck when I try to turn it 90 degrees to remove it. The socket appears to be of rotary lock type, the same as the one in this question: How to ...
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1answer
53 views

Replace fluorescent lights with LED lights

Can I replace fluorescent lights (30W, 36" long - F30T12 H998) with LED lights?
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1answer
36 views

Fluorescent Light issue

I have a 4 bulb light fixture which suddenly just went out. I checked and there was power to it. I changed all the bulbs in case one was bad and still nothing. So I purchased a new ballast and ...
2
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2answers
127 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-...
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2answers
52 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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2answers
74 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 ...
2
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3answers
110 views

Name for tombstone-holder parts?

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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2answers
81 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 ...
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4answers
3k views

Does a fluorescent lamp that does not light up still draw power?

First of all, I am not a native English speaker, please forgive me. I recently rented the room I am currently living in. On the ceiling there are fluorescent fixtures like the picture below (I found ...
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1answer
32 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 ...
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2answers
464 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 ...
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2answers
335 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?
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2answers
290 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 ...
2
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2answers
1k views

Replacement Options for T12 Four light fluorescent light fixture

I have a good number of fluorescent light fixtures that are old the ballasts are going out. There are two ballasts per fixture. The ballasts are expensive when factoring in labor cost. Covering to T8 ...
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1answer
187 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 ...
2
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1answer
88 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 ...
4
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5answers
515 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 ...
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2answers
132 views

Heater fan causes fluorescent light to dim/flicker

While we were cleaning out a friend's garage I turned on a heater fan. I didn't take a good look at it but it has a digital display, thermostat, and I'm pretty sure it's a wire element type. It ...
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3answers
4k views

Is a ballast required, or merely acceptable, for this Philips InstantFit LED tube?

Rather than replace a dead ballast in a fluorescent fixture, I've decided to simply bypass and move to LEDs. However, I think I may have grabbed the wrong kind of replacement tubes the other day in ...
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3answers
963 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 ...
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1answer
1k 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 ...
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3answers
8k views

Fluorescent fixture won't stay lit

I have a two-bulb F28T5 light fixture that went out and replacing the bulbs with new ones did not fix it. So I replaced the ballast with a new one. The lights come on but go out within a second or so....
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2answers
393 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 ...
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2answers
664 views

Fluorescent Without Fixture

I want to achive a very simple look with fluorescent lights. I want to hang a fluorescent tube from the ceiling with as little as possible. Was thinking maybe hanging them just in the cord to each end ...
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0answers
68 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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1answer
1k views

Shock when Installing Fluorescent Bulb 50VAC between frame and GLASS of Lamp - New Ballast Installed

I have a ballast that we are replacing in a church. There are approximately 12 dual lamp T12 Fixtures in parallel drops. The fixtures are all in line -- but L1, Neutral and Ground are parallel drops. ...
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2answers
1k views

How would I wire a motion sensor to a fluorescent light?

How would I wire this motion sensor to the fluorescent light? I’ve heard that not all motion sensors are created equal and it may shorten the lifespan of the bulbs or possibly the transformer but if ...
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2answers
727 views

Fluorescent light requires twist to start

I have a fluorescent light in my bathroom. It used to work fine, but then had issues with it not turning on. I replaced the tube, but it hasn't fixed the issue. I can get the light to come on if I ...
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1answer
86 views

fluorescent Tube F15 T8 Not working

I have a desk lamp that takes 2 fluorescent tubes F15 T8. The current tubes work but I wanted new ones. I just purchased new tubes and they don't work at all. Any idea what is the difference between ...
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2answers
3k views

dimmable led bulbs won't work in dimmable fixture

Our living room has 4 dimmable lights controlled by 1 switch and slider. Many years ago, we replaced the incandescent lights with fluorescent bulbs (we didn't know that fluorescent bulbs don't dim out ...
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2answers
2k views

Fluorescent light wont work after replacing starter and bulb

I have 2 single bulb fluorescent lights that do not turn on after replacing the bulb and starter. What else could be preventing the light from turning on? ANy advice on what should I check? Thanks
19
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7answers
4k views

How to deal with broken compact fluorescent (and its mercury) without breaking the bank?

We're now out of the compact fluorescent era, fortunately, but we wound up with 3 or 4 broken CF bulbs from somebody not being careful with a box of them in the garage ... We're moving and I want to ...
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0answers
39 views

Fluorescent fitting problem

I live in France. I have just received a replacement twin fluorescent fitting to replace a unit that failed after 3 months. I have tested the new fitting on a bench, connecting live neutral and earth ...
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1answer
45 views

Another fluorescent light question

The fixtures are older T-12, 8', 2 lamp, single point ends. There are many at this location but this one is not working for me. First it wouldn't come on at all. I replaced the ballast with a new ...
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3answers
556 views

How do I remove the T shaped metal device that is holding my fluorescent ballast cover on?

I'm trying to take the cover off of my fluorescent fixture, but I can't seem to figure out this fastener. I've tried rotating it to no effect.
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2answers
3k views

Can I run a T5HO ballast with significantly lower wattage T5NO bulbs?

I gather this is generally possible, as long as bulbs draw less power than the ballast can provide, but are there limits on how low you can go? I currently have an electronic ballast for 1 or 2 54W ...
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2answers
242 views

Installing single-ended LED in a pre-existing T-8 fixture with only one connection per side

I have a set of new LED bulbs which want hot & neutral connection at just one end of each bulb. The fixture in question however is wired differently than I expected. It has just one wire per end....
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3answers
59 views

How to get a TL light working

I have a set of fluorescent tubes (2) in my kitchen and they both do not work (noticed while I came home). Normally one of the starters is broken and I replace it but this time both lights to not ...
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1answer
2k views

Why don't my fluorescent lights work after a nearby lightning strike?

I was working in the basement during a thunderstorm, with two banks of fluorescent tube lights (like office lights) in two rooms on. Thunder pealed, power went out. Every so often there would be a ...
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2answers
1k views

Replace A T5 Fluorescent to A T8 LED

I currently have a T5 Fluorescent Fixture which one socket broke. I got a great deal on LED Bulbs which are a direct replacement to T8 Fluorescent bulbs. Would I be able to reoutfit the fixture with ...
1
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1answer
566 views

Direct Wire LED: T12 Replacement

CONTEXT An older office's 4-foot T12's are to be replaced with direct wire LEDs because the ballast cost + labor can be avoided. The instructions indicate that the hot is wired to one end and the ...
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4answers
455 views

How can I determine the color / temperature of my current fluorescent bulbs?

I intend to replace an old and large population of T12 flourescent lights with T8 LEDs: direct wiring. The ballasts are $15 a piece (2 required per fixture) and it would seem that a 4 X $10 direct ...
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2answers
1k views

Are LED retrofit bulbs more resilient to ballast problems?

My office overhead lighting currently uses fluorescent bulbs. For ~5 minutes after turning them on, lights will flicker. I diagnose this as a weak ballast. If I insert LED retrofit bulbs into this ...
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1answer
52 views

Trying to replace 1988 t12 w/ led 4ft bulbs

My question is this: I removed the t12 ballasts, and direct wired the 2 ends of the fixture, one to each wire coming from the box. I put in t8 LED bulbs. They don't light. They are Sylvania 5000k 32 w ...