Fluorescent Starters | All You Need To Know - Lightbulbs Direct

Fluorescent starters or glow starters are used to help fluorescent tubes and lamps ignite in the initial starting stage of their operation.

Simply put, fluorescent starters are a timed switch. The switch opens and closes until the fluorescent tube ‘strikes’ and lights-up. If the fluorescent tube does not light, the switch repeats it’s open/close cycle and the fluorescent tubes attempts to ignite again.

Read on if you would like to know more about this process…

When power is first applied to a fluorescent fitting, the current creates two electrodes inside the fluorescent starter to heat and glow. This causes one of the electrodes in the fluorescent starter to bend towards and make contact with the other electrode. This closes the switch and the current now passes through the fluorescent starter and on to the rest of the fitting. This means that the circuit across the fluorescent tube and the ballast in the fitting will effectively be switched “in series” to the supply voltage.

The current that is now flowing into the fluorescent tube causes filaments at each end of the fluorescent tube to heat up and begin to emit electrons into the gas that exists inside the fluorescent tube by a process known as thermionic emission.

Inside the fluorescent starter, the touching electrodes short out the voltage sustaining them and they begin to cool down and bend away from each other. This then opens the switch within a second or two.

The current through the filaments in the fluorescent tube and the ballast is then interrupted, and with the circuit no longer in series, the full voltage is applied to the fluorescent tube filaments and this generates an inductive kick which provides the high voltage required to start the fluorescent tube.

If the filaments were not hot enough during the initial cycle, then the fluorescent tube does not light, and the cycle repeats with the starter heating up and closing the circuit again.

Several cycles are usually needed to ignite the fluorescent tube and this causes flickering and clicking during the starting stage.

Once the fluorescent tube strikes, the starter switch does not close again because the voltage across the lit fluorescent tube is insufficient to re-start the heating up process of the electrodes in the fluorescent starter.

The older the fluorescent tube is and the older the fluorescent starter is, the less efficient they are at igniting. A tube that takes more than a few seconds to start-up is a clear indicator that the tube and starter may need replacing.

Types of Fluorescent Starters

Fluorescent starters can be identified by a designated wattage written on the side. The wattage is directly related to the length of the fluorescent tube it is designed to work with.

Listed below are the 3 most common types of fluorescent starter:

Series Twin Tube FS2 Series Starter Up to 22W

For use with fittings with multiple fluorescent tubes.

Single Tube Starter FSU Universal 4W to 65W

2ft 18W, 3ft 30W, 4ft 36W and 5ft 58W fluorescent tubes.

Single Tube Starter FS125 70W to 125W

6ft fluorescent tubes of 70W and over.

2D Lamps and T9 Circular Lamps

As a general rule, lamps with 2-pins have the starter built into the body of the lamp but 4-pin versions need an external fluorescent starter.

When replacing a 2D or circular lamp make sure you replace like-for-like with the appropriate wattage.

How do you know if you need a new starter?

• A flickering fluorescent tube.
• The fluorescent tube does not light.
• Fluorescent tube lights at one end only.
• Fluorescent tube lights at the ends only but not in the middle.

When considering re-lamping an area with multiple tubes we suggest replacing all the old tubes for new.

Older tubes lose colour and can appear dull over time. New ones alongside will look brighter and cleaner.

Re-lamping all the tubes in the room together will give an overall uniform appearance.

Make sure you read our handy guide to replacing fluorescent tubes.

We also advise replacing all fluorescent starters whenever you replace a tube. This ensures a prompt and efficient start-up, promotes maximum performance from the tube and can extend tube life.

Please note that LED tubes are supplied with their own special starter – which is essentially a circuit which bypasses the function that a normal fluorescent starter would perform (LED tubes do not need to “heat up”). NEVER use a fluorescent starter with an LED tube.

4.3 17 votes Article Rating

Related Posts:

Fluorescent Tubes – Get The Right Tube Every TimeFluorescent tubes generally have a two-pin fitting at both ends of the tube and generally, length goes hand in hand with wattage... Why Should You Switch to LED Tubes?There has been a lot of attention towards LED tubes in the consumer market and this blog will explain why people are... How to fit an LED tubeFirstly make sure that you have ordered the correct sized tube. This is a good rule of thumb for any lighting –... Subscribe Notify of new follow-up comments new replies to my comments Label {} [+] Name* Email* Website Label {} [+] Name* Email* Website 117 Comments Newest Oldest Most Voted Inline Feedbacks View all comments David Moore December 15, 2025 2:53 pm

Have just bought Compton Circular T9 4w-65w 220 -240 lamp….when fitted and switched on the starter did not light lamp. Can you please advise which Starter is recommended. most are T8/ T12 compatible. my lamps were installed 2009/10

0 Reply Mat @ Lightbulbs Direct Admin Reply to David Moore January 2, 2026 11:32 am

Sorry, confused by your question. You bought a Crompton T9 lamp and want a starter for it? What is the wattage of the lamp? (4-65W is the wattage of our universal starter, which, coincidentally will probably be sufficient for your needs).

0 Reply Monica November 21, 2025 2:54 pm

I have an old bug zapper. The bulb that was in it was a U-shaped bulb roughly 16 inches long. I bought a replacement bulb that is 50 watts. The starter on it is FS-4 with a condenser 30-36w 40-48w. My light won’t come on. Starter bad? And do I need a starter rated for 50watts?

1 Reply Mat @ Lightbulbs Direct Admin Reply to Monica November 25, 2025 3:13 pm

Wether the starter is bad or not, I don’t think it is rated high enough for a 50W tube. Replace the starter with a Crompton Lamps Fluorescent Starter FSU 4W – 65W

0 Reply Mary Lane October 16, 2025 7:56 pm

I have an aquarium light that uses a Fs-4 fuse. Went to the hardware store and they said an fs-4b is the same. I have looked it up and now am uncertain. The bulb it a t-8. Please advise me.

0 Reply Mat @ Lightbulbs Direct Admin Reply to Mary Lane October 22, 2025 2:51 pm

Yeah you should be fine. All you need to check is the that the wattage of the T8 tube in the range of the FS-4b.

0 Reply Kathleen January 12, 2025 10:54 pm

Can I use FS-2 to replace my FS-2B starter?

0 Reply Jim Schaffer December 11, 2024 1:27 pm

Should I remove the Starter if I’m planning on installing an LED bulb? Or is the Starter required for power?

0 Reply Mat @ Lightbulbs Direct Admin Reply to Jim Schaffer January 30, 2025 1:45 pm

If you upgrade to LED T8 Tubes, they come with a special LED Starter to swap out.

0 Reply Wayne November 15, 2024 9:41 pm

Can I replace an FS-U starter with an FS-5? The FS-U is difficult to obtain. It is for an 8W 12″ fluorescent light.

2 Reply Mat @ Lightbulbs Direct Admin Reply to Wayne December 9, 2024 10:21 am

Not sure about the FS-5, but we have some FSU on order and they should be stock soon.

0 Reply Ken October 16, 2024 5:48 pm

I have a FS-1P 10-20w starter w/condenser for approx.12″ circular fluorescent light. Seems hard to find this exact type., What can I substitute?

Last edited 1 year ago by Ken 0 Reply Mat @ Lightbulbs Direct Admin Reply to Ken November 11, 2024 10:47 am

Our universal 4W-65W starter will probably do the trick.

0 Reply Eddie Dornan October 12, 2024 6:17 am

My sister had me buy some Florence lights and they didn’t work

0 Reply issy September 10, 2024 7:17 am

can i leave it out

0 Reply Mat @ Lightbulbs Direct Admin Reply to issy September 23, 2024 2:36 pm

No, your light will not work.

0 Reply Joyce Williams February 6, 2024 1:07 am

Can I replace an old FS-5x 4,6,8 WATT starter with a FS-5 4,6,8 WATT?

-1 Reply Lee Clements January 15, 2024 7:08 am

what will happen if i use a a st151 22w starter instead of a 155/800 starter

-4 Reply Jim December 19, 2023 3:28 pm

I have a bad FS-2C, How would I determine if need the 2C or if I could replace it with an FS-2 ?

0 Reply Mat @ Lightbulbs Direct Admin Reply to Jim January 18, 2024 10:07 am

The C stands for Condenser – this type of starter has an extra capacitor in it’s circuitry to make a smoother electrical output. You should be able to swap out with a FS-2 with no issues.

1 Reply Therese December 9, 2023 4:37 pm

I have recently replaced a starter. Can I recycle the old one? I was wondering if I could take it to somewhere that takes old electricals for recycling (eg Currys).

1 Reply Mat @ Lightbulbs Direct Admin Reply to Therese December 11, 2023 12:30 pm

Hi Therese, although we offer our own WEEE (Waste Electrical) recycling facility, for something as small as a starter you may want to look up somehwere local to you. You can find Local Authority owned facilities or you may find your local B&Q offers a free WEEE disposal facility.

Last edited 3 months ago by Mat @ Lightbulbs Direct 0 Reply Alex November 30, 2023 2:57 am

Replacing a T9 4 prong bulb. The ends dimly lit orange and nothing in the middle. Is this a bad ballast? Bad bulb? Does the entire light fixture need to be replaced?

0 Reply Mat @ Lightbulbs Direct Admin Reply to Alex November 30, 2023 10:22 am

Could be both, bad tube or bad ballast. If you bought the tube from us, you could try purchasing a new tube, and if it works fine, then let us know and we will refund the full order for the first tube.

0 Reply Reb November 27, 2023 11:03 pm

If I have an older fluorescent light fixture that uses a starter, then I can’t switch the tubes to LED tubes? I would have to replace the entire fixture or stick with the older type tubes?

0 Reply Mat @ Lightbulbs Direct Admin Reply to Reb November 30, 2023 10:18 am

Hi Reb, our LED T8 tubes come with a special LED starter that you swap out when you install the tube meaning they are a simple replacement for flourescent tubes.

0 Reply Jody November 21, 2023 4:42 pm

What do I do if my LED is starting to have a slight delay in turning on. Does that mean new bulbs? The bulbs are 3ft tubes.

1 Reply Mat @ Lightbulbs Direct Admin Reply to Jody November 30, 2023 10:16 am

Hi Jody, with this being a tube, we suspect that the ballast in your fitting may be the cause. You could try a new tube and see if the same thing happens?

0 Reply Philly de Lacey October 29, 2023 11:00 pm

I can’t find the start on a duo lamp system – can you let me know where to find it?

0 Reply Mat @ Lightbulbs Direct Admin Reply to Philly de Lacey October 30, 2023 9:20 am

Hi Philly, chances are that your fitting uses a high-frequency electronic ballast that supplies it’s own boost to light up the lamps. There is no requirement for a starter in these type of fittings.

0 Reply Jane smith October 29, 2023 5:39 am

Helpful thanks

0 Reply Brenda Hoffman October 16, 2023 7:51 pm

What is the difference between an fs-5 starter and an sfv-5 starter? Are they interchangeable?

0 Reply Mat @ Lightbulbs Direct Admin Reply to Brenda Hoffman October 24, 2023 3:46 pm

Sorry Brenda, I can’t find any information on this starter. Perhaps you could type out all the text you see on the starter and we may be able to identify it.

0 Reply Bob September 23, 2023 4:57 pm

I have a Blackflag bug zapper 5500 40w for about 5 yrs, it has worked perfectly up until recently. It’s got the 4pin receptacle and on the backside of it with the wires it has a 1250V HEL 472J capacitor soldered to this receptacle . It’s also got the black U Shaped Florescent Tube. I’ve been reading a lot and I did see on a few sites that some equipment has a start capacitor instead of the micro starter, maybe newer technology? I say this because I cannot find a micro starter anywhere. On the board there are some thumbnail sized encased in the metal housing like the larger starters I’ve seen the pictures of, but the ones on my board are much much smaller and smaller diameters also. Again thumb nail size and much smaller. Thank you in advance Great thread going here

0 Reply Mat @ Lightbulbs Direct Admin Reply to Bob October 5, 2023 11:07 am

As all UV lamps are fluorescent technology, they all require the same standard of technology to ignite the tube. As long as the unit is in working capacity, you should just replace the tube like-for-like, i.e. a 40W U shaped 4-pin tube.

0 Reply Ty Risk September 15, 2023 6:18 am

My housing commission flat does not have a see-able starter fuse for my fluorescent light tube

0 Reply Mat @ Lightbulbs Direct Admin Reply to Ty Risk October 5, 2023 11:27 am

You may have an electronic ballast in the fitting which doesn’t require a starter, but would not the housing commission be responsible for replacement of tubes?

0 Reply Nancy July 24, 2023 11:28 pm

Hello, Can you tell me the difference between an FS-4C 13-30-40W starter and an FS-4 13-30-40W (No “C” in the second one) and can I buy them from you? Also may I use a 40W starter with a 25W tube? Thanks, Nancy

0 Reply Mat @ Lightbulbs Direct Admin Reply to Nancy August 1, 2023 10:01 am

So the ‘C’ stands for the old-term ‘condenser’, a more modern way of explaining this is that there is a capacitor in the starter. This capacitor makes the electric current in phase with the ballast in the fitting ensuring a smoother and slightly more efficient electrical supply to the tube. We do not sell FS-4 starters of either type, but a quick google search shows various websites that do. I would suggest you contact one of them to ask about wattage and whether you need to use a C or non-C.

1 Reply Nancy Reply to Mat @ Lightbulbs Direct August 2, 2023 11:01 pm

Thank you so much.

1 Reply Wall July 18, 2023 1:36 pm

I have 4pin energy lamp for bathroom what size starter do I need

0 Reply Julia Dykes June 16, 2023 3:24 pm

Hi, I need to replace the starter on a bulb on an industrial embroidery machine. The starter on there at the moment is an NEC FG-4P 36.40. I’ve tried to find a replacement, but I’m guessing it’s a Japanese starter. Is there a UK equivalent? I’d be grateful for any help – I don’t want to blow aa fuse! Thanks.

0 Reply Mat @ Lightbulbs Direct Admin Reply to Julia Dykes July 10, 2023 11:03 am

Tough one, on the face of it, this looks like a simple 40W starter, but we cannot find any technical data-sheets to back that up, and we certainly wouldn’t want to recommend a wrong solution. We did, however, notice that there are various sellers on Amazon who can ship this starter from Japan to the UK, some in boxes of 25, so might be worth getting a bulk shipment in like that to keep you going for a few years?

Last edited 1 year ago by Mat @ Lightbulbs Direct 0 Reply James Gilpin June 11, 2023 11:57 am

I have a bathroom mirror with integral 18W F18/T8 600mm fluorescent tubes. I can’t see a starter anywhere. Can I replace these tubes with LED equivalents?

0 Reply Mat @ Lightbulbs Direct Admin Reply to James Gilpin July 10, 2023 10:52 am

You can, but you would have to re-wire the fitting to bypass the fluorescent transformer inside the fitting. Then an LED tube like our 2ft Cool white T8 tube would be an excellent equivalent.

0 Reply Doreen Broomfield May 19, 2023 10:34 am

The starter needs replacing on my fluorescent tube and I am having problems trying to replace the starter. Whilst it is supposed to be a standard fit, I have purchased 2 of the correct wattage and whilst it looks the same, does not fit snuggly the way the old one does. The one I have is 4-65W made by Kingfisher. Can you help?

1 Reply Mat @ Lightbulbs Direct Admin Reply to Doreen Broomfield May 22, 2023 10:00 am

Starters have a universal fitting meaning that any brand of starter should fit. I suspect something is wrong with your fitting, maybe something has become corroded or bent out of shape?

0 Reply Lee Newton Reply to Doreen Broomfield July 10, 2023 3:35 pm

The starter should rotate roughly a quarter-turn anticlockwise for removal, and the opposite direction for insertion of a replacement. Perhaps the starter socket has become distorted. If the new device is not making contact you can tease out the starter socket contacts with a screwdriver to bring them back in play (with the luminaire isolated or course, though.

0 Reply Bert April 10, 2023 11:42 am

Just replaced the 4’ fluorescent tubes in my father’s garage. Looks like new starters are also required. Any idea what starter should be used to replace PGSU 200/250V single 32-40W starters?

-1 Reply Mat @ Lightbulbs Direct Admin Reply to Bert April 12, 2023 11:48 am

Our FSU Universal starter 4W – 65W should suffice

-1 Reply Robert Deming Hoskins March 2, 2023 1:35 pm

I have a Budweiser pool table light it has two fluorescent tubes 33″ long. I put two new F2T12CW33 tubes and two new FS25 starters. When I turned the light on, I got a quick burst of light at one end of the fluorescent tubes and then nothing. I can’t find information on what tubes or starters it should have in this light.

1 Reply Mat @ Lightbulbs Direct Admin Reply to Robert Deming Hoskins March 13, 2023 3:26 pm

Hi Robert, Although we don’t sell them, going by the part numbers, you’re starters aren’t rated with a high enough wattage. The tubes are rated at 33W, but the starter’s are rated at 25W – so they probably aren’t providing enough power to start the tube. You could try swapping out to our 4W to 65W starters.

0 Reply sabra howell February 20, 2023 2:21 pm

can a bad tube and aged starter completely blow the power out in a bathroom?? how do i test a starter to see whether or not it’s still good?

0 Reply Mat @ Lightbulbs Direct Admin Reply to sabra howell February 28, 2023 3:35 pm

Possibly – there is quite a large surge of power going to the tube to ‘fire’ it up and this could have tripped your circuit. Starters are pretty cheap to buy and we always recommend swapping out the starter to a new one each time the tube is replaced.

0 Reply Tony Betts January 27, 2023 10:13 am

A new replacement Sylvania FS11 70 w starter causes tube to flicker. Is there a more powerful starter available or is it time to replace the tube?

0 Reply Mat @ Lightbulbs Direct Admin Reply to Tony Betts February 2, 2023 4:18 pm

Is the starter kicking in again after the tube has been lit? If working perfectly, when the tube is lit, the starter remains open. So I suspect the tube is failing, or possibly the ballast in the fitting.

0 Reply JOHN P. CASTLEMAN, Jr. January 14, 2023 7:36 pm

I’m replacing a T12 75W, 110v Dual bulb starter. What starter do I need?

0 Reply Mat @ Lightbulbs Direct Admin Reply to JOHN P. CASTLEMAN, Jr. January 26, 2023 4:16 pm

Having searched around the internet we cannot find any suitable starter – are you sure you require a 75W 110V?

0 Reply Geo November 6, 2022 7:47 am

Need to replace an electronic starter for a 40W circular tube. Old part is YZ140EA but only same size replacement I can find is YZ138EAA (ie. rated for a 38W tube). Any idea if I’m likely to hit a problem fitting the 38W starter?

0 Reply Mat @ Lightbulbs Direct Admin Reply to Geo November 8, 2022 12:28 pm

A 38W starter may not provide enough ooompf to ignite a 40W tube, but why couldn’t you use a FSU starter which are rated from 4W to 65W? Is it a high frequency fitting?

0 Reply Chris September 4, 2022 10:49 pm

Hi – if I remove the tube but not the starter, does this still use electricity or none at all?

0 Reply Frank August 29, 2022 3:57 am

I have an old 12″ light in our bathroom with a bad starter. The starter is an FSV-12 for 32 w circline. Obviously it is not the correct one but it worked for decades. However, it is unique from any I’ve ever seen because it has a groove in the head of the pins. A regular FS2 will not fit in the socket. I don’t see any on-line. Is this an obsolete starter? Is there a small ballast replacement for this like there is for the 4 ‘ ceiling lights?

Thanks

0 Reply Mat @ Lightbulbs Direct Admin Reply to Frank September 15, 2022 2:38 pm

Sorry to hear you are having difficulty in finding these starters – they are not familiar to us either. Does the FSV-12 starters have a brand name for a company you could contact and see if they have any UK distributors?

0 Reply Lee Newton Reply to Frank July 10, 2023 3:40 pm

A 32W circline tube needs a FSU starter. That will run it absolutely fine. FSV12 was an old starter denomination that was declared unnecessary as anything from a 3ft 30W (which a 32w circline is, in principle) up to a 5 ft 80W will comply electrically. Fit a new lamp and an FSU, if you haven’t discovered this already 🙂

-1 Reply Derek Bird August 13, 2022 4:47 pm

I have a 4 pin T5 40w 6400k circular flourescent ring but i can’t find what starter i need, the one that is in has disintergrated so i don’tk now no. can anyone help please.

0 Reply Mat @ Lightbulbs Direct Admin Reply to Derek Bird August 22, 2022 9:33 am

Starters are rated for the wattage of lamp they can be used with, so with a 40W tube, you could try our 4W to 65W starter

0 Reply Catherine May 17, 2022 3:23 pm

Do I need a starter for a new 28W CFL CC GR10q – 4pin, col. 835 – 3500K White? It’s taking about 5 mins to come on which isn’t great for a bathroom light. The lighting shop didn’t mention replacing a starter. I don’t even know what one if any to get. Thanks

0 Reply Mat @ Lightbulbs Direct Admin Reply to Catherine May 20, 2022 1:25 pm

No, they don’t use starters – BUT, the light fitting will have control gear inside to drive the lamp – this is probably on it’s way out. Probably time to replace the fitting, I’m afraid.

0 Reply Lee Newton Reply to Catherine July 10, 2023 3:43 pm

Some fittings for 28w 4-pin 2D lamps do use starters. You will need a FSU if that’s the case in your luminaire. Don’t throw out the fitting unless you’ve checked this. Two-pin versions are the only type that absolutely do not require a separate starter as one is incorporated in the lamp itself.

0 Reply Nick Goodall May 14, 2022 8:35 am

You say “current creates two electrodes inside the fluorescent starter to heat and glow”. Would it be better to say “current causes two electrodes inside the fluorescent starter to heat and glow”?

0 Reply Larry Rueff April 10, 2022 1:31 pm

This article actually does NOT explain how starters work. The starters are actually gas tubes. The gas lights up and the current causes it to heat up enough for the bi-metal strip to bend and make contact between the electrodes. When that happens the current is directed through the filaments of the fluorescent lamp in series. THEN, they cool off because the contacts are connected. When they cool off and disconnect the ballast current spikes a voltage across the lamp which now has hot filaments and the tube lights. The voltage across the now lighted lamp is too low to relight the starter.

2 Reply Denny March 11, 2022 7:18 pm

Have question .. why with new bulb & starter does flourescent still flicker. I have to remove starter to get bulb on & is fine.

2 Reply Lee Newton Reply to Denny July 10, 2023 3:45 pm

Wrong starter. Specifics would help. In another comment, I have left a table of starters and suitable lamps. What is happening is the operating voltage of the tube is above the critical enagaging voltage of the starter causing it to operate, if the tube runs fine when it is removed.

0 Reply Nancy February 3, 2022 2:03 am

Hi. The starter on my old stove’s fluorescent light blew and shattered. I’m using t8, 18 watt double ended fluorescent tube. Hard to still find, but I stocked up. If it makes any difference, the ballast is magnetic. So would the universal FSU 4 watt to 65 watt single tube starter work for me? And is it normal for the old starter to shatter and flash when it needs replacement?

0 Reply Mat @ Lightbulbs Direct Admin Reply to Nancy March 10, 2022 1:53 pm

Hi Nancy, firstly, yes, the FSU 4W-65W starter is correct for you. I’ve certainly not come across an old starter shattering before – I can only assume the material has degraded over time due to the heat of the stove.

0 Reply Brian Hanley January 28, 2022 6:55 pm

What is the difference between a FS-2 and FS-5 Starter. They both seem to work fine in an 18″ bar light? Are they interchangable?

0 Reply Les Cooper January 24, 2022 3:03 pm

Some starter state ‘with condenser’ and others don’t. My existing starter is an FS-U 65-70w with condenser for a 6 foot tube. What is the difference if any?

0 Reply Mat @ Lightbulbs Direct Admin Reply to Les Cooper January 24, 2022 3:56 pm

Hi Les, it’s just terminology, condenser vs capacitor – they are all the same thing. You are able to replace with Crompton Lamps Fluorescent Starter FSU 4W – 65W or Crompton Lamps Fluorescent Starter 70W – 125W (depending on the wattage of your tubes).

0 Reply denis kirby December 15, 2021 9:58 pm

i have got 58w t26 light what starter would i need

0 Reply Mat @ Lightbulbs Direct Admin Reply to denis kirby December 16, 2021 3:07 pm

You need a universal 4W to 65W starter

0 Reply My November 23, 2021 5:39 pm

Can you use a FS-2 starter 14.15.20w to replace a FS-U 14.15.20w starter ? Thanks

0 Reply Mat @ Lightbulbs Direct Admin Reply to My November 24, 2021 4:52 pm

Yes

0 Reply Olufemi Odusola November 23, 2021 4:27 pm

Hi there, before I read this message, I didn’t know what it was all about, but the Fluorescent in my kitchen failed to switch on, then all what you said made sense to me, I’ve now changed the Starter which wasn’t working properly & I saw that the Fluorescent started to work properly.

Thanks for your help.

1 Reply David Becker November 14, 2021 1:08 am

What was the last year that they made fluorescent fixtures with starters??

0 Reply Mark S October 8, 2021 12:17 pm

Useful article, thanks. I’ve noticed that FS125 starters have been installed on a number of fittings that have 36w, 58w and 70w tubes. I guess at some point someone thought its easier just to buy one box to cover all fittings. Is this an issue for the lower wattage tubes or should FSU be swapped in?

0 Reply Mat @ Lightbulbs Direct Admin Reply to Mark S October 18, 2021 4:56 pm

FS125’s have a rating of 70W – 125W, so yes, we would advise swapping to FSU starters on those 36W and 58W fittings.

0 Reply Lee Newton Reply to Mark S July 10, 2023 3:47 pm

They’ll operate, but suboptimally. Risk of cold-starting that might wear out the lamp prematurely. FSU for the 36w and 58w, and FS125 for the 70w should be fine.

0 Reply Lynn October 7, 2021 8:44 pm

I tried to insert starter unit it went straight through into the strip light what can l do

-1 Reply Mat @ Lightbulbs Direct Admin Reply to Lynn October 7, 2021 8:51 pm

For safety reasons it would be best to replace the fitting. Something may have broken inside the fitting.

0 Reply Lynn October 7, 2021 8:34 pm

The starter unit went strait through the hole what can l do

0 Reply Dan August 23, 2021 7:36 pm

Thank you for all the good info on your website! I was wondering if an FS-2 starter can substitute for an FS-2C. I cannot find the 2c starters and any references on the web seem to be from people who bought FS-2 starters and say that it is ok based on that it seems to work This is for a lamp that is 22 years old. It is in a kitchen pantry and is usually only on for short periods of time so I really don’t need to buy an LED to save electricity. There is a Phillips F20T12/0 bulb in the lamp. So is an FS-2 ok or should I replace the whole lamp. I don’t want there to be any problems. Thanks!

0 Reply Mat @ Lightbulbs Direct Admin Reply to Dan September 1, 2021 2:35 pm

Just done a search for FS2C and can’t find anything decisive on that code. Certainly the wattage of a FS-2 is in tolerance with the F20T12/0 tube you have fitted – so it should work.

0 Reply Load More Comments