Currently have two single 70 watt 6 foot fluoros on the kitchen ceiling. 4,000
Kelvin and apparent;y 6200 lumens each. Thinking of changing them for LED
battens. Will two of these from Wickes:

https://www.wickes.co.uk/Sylvania-Single-6ft-IP20-Light-Fitting-with-T8-Integrated-LED-Tube---24W/p/185067

be an adequate replacement in terms of light output? they are half the
output, but I am lead to believe that LED battens have a directionalty which
makes up for this, not sending light upwards, iirc.

Anyone have any experience with this sort of swap, or any
recommendations for better light options?

TIA

David Paste.

In article <d0aefecb-6e12-4f8c-a3bd-918bfcd7dc84n@googlegroups.com>, David
Paste <pastedavid@gmail.com> wrote:
> Currently have two single 70 watt 6 foot fluoros on the kitchen ceiling.
> 4,000 Kelvin and apparent;y 6200 lumens each. Thinking of changing them
> for LED battens. Will two of these from Wickes:

> https://www.wickes.co.uk/Sylvania-Single-6ft-IP20-Light-Fitting-with-T8-Integrated-LED-Tube---24W/p/185067

> be an adequate replacement in terms of light output? they are half the
> output, but I am lead to believe that LED battens have a directionalty
> which makes up for this, not sending light upwards, iirc.

> Anyone have any experience with this sort of swap, or any recommendations
> for better light options?

> TIA

> David Paste.

I've only changed 4' fluo tubes for LEDs. Ecellent results.

--
from KT24 in Surrey, England - sent from my RISC OS 4té
"I'd rather die of exhaustion than die of boredom" Thomas Carlyle

On Thursday, 9 February 2023 at 20:45:12 UTC, charles wrote:

> I've only changed 4' fluo tubes for LEDs. Ecellent results.

Cheers! What about the relative brightness? Which LED make did
you choose?

On Thursday, February 9, 2023 at 8:26:54 PM UTC, David Paste wrote:
> Currently have two single 70 watt 6 foot fluoros on the kitchen ceiling. 4,000
> Kelvin and apparent;y 6200 lumens each. Thinking of changing them for LED
> battens. Will two of these from Wickes:
>
> https://www.wickes.co.uk/Sylvania-Single-6ft-IP20-Light-Fitting-with-T8-Integrated-LED-Tube---24W/p/185067
>
> be an adequate replacement in terms of light output? they are half the
> output, but I am lead to believe that LED battens have a directionalty which
> makes up for this, not sending light upwards, iirc.
>
> Anyone have any experience with this sort of swap, or any
> recommendations for better light options?
>
FWIW I recently, in our kitchen, replaced a Ceiling fitting with
(IIRC) 2off 5ft Fluorescent tubes (T8? sorry, can't remember),
with an LED *Panel* light - one of these:

https://www.lights.co.uk/arcchio-lysander-led-panel-cct-119-cm-58-w-white.html

which is 119 x 58cm, 4600lumens.

I paid (to my eyes) for more than a basic one;
This has remote setting of brightness and colour temperature.

I've actually been really pleased with it. The ability to set both
brightness and colour temperature is nice, and the lack of an
inrush 'hum' on startup is also pleasing. Like you I was a bit concerned
about the possible difference in output lumens (sorry, haven't
got my figures to hand), but the effectiveness of the lighting
has been at least as good.

My main reservations are the initial cost, and the non-replaceability
of the panel, but in this case I decided it was worth it.

HTH, Jon N

On 09/02/2023 20:26, David Paste wrote:
> Currently have two single 70 watt 6 foot fluoros on the kitchen ceiling. 4,000
> Kelvin and apparent;y 6200 lumens each. Thinking of changing them for LED
> battens. Will two of these from Wickes:
>
> https://www.wickes.co.uk/Sylvania-Single-6ft-IP20-Light-Fitting-with-T8-Integrated-LED-Tube---24W/p/185067
>
> be an adequate replacement in terms of light output? they are half the
> output, but I am lead to believe that LED battens have a directionalty which
> makes up for this, not sending light upwards, iirc.
>
> Anyone have any experience with this sort of swap, or any
> recommendations for better light options?

If the tubes are old, their light output will be down. My experience is
they compare well. The eye sees light in logarithmic terms so if there
is a 50% reduction in Lumens, it won't be seen as perceived 50% drop.

On Thursday, 9 February 2023 at 22:03:59 UTC, jkn wrote:

> FWIW I recently, in our kitchen, replaced a Ceiling fitting with
> (IIRC) 2off 5ft Fluorescent tubes (T8? sorry, can't remember),
> with an LED *Panel* light - one of these:
>
> https://www.lights.co.uk/arcchio-lysander-led-panel-cct-119-cm-58-w-white.html

Thanks Jon, that's a bit out of my league though.

On 09/02/2023 22:13, David Paste wrote:
> On Thursday, 9 February 2023 at 22:03:59 UTC, jkn wrote:
>
>> FWIW I recently, in our kitchen, replaced a Ceiling fitting with
>> (IIRC) 2off 5ft Fluorescent tubes (T8? sorry, can't remember),
>> with an LED *Panel* light - one of these:
>>
>> https://www.lights.co.uk/arcchio-lysander-led-panel-cct-119-cm-58-w-white.html
>
> Thanks Jon, that's a bit out of my league though.

This might be in your league:
https://www.toolstation.com/led-batten-fitting/p37206

or more output:
https://www.toolstation.com/led-batten-fitting/p54130

On 09/02/2023 21:40, David Paste wrote:
> On Thursday, 9 February 2023 at 20:45:12 UTC, charles wrote:
>
>> I've only changed 4' fluo tubes for LEDs. Ecellent results.
>
> Cheers! What about the relative brightness? Which LED make did
> you choose?

I recently changed a 4' 36W tube for:

https://www.screwfix.com/p/philips-g13-t8-led-tube-1600lm-16w-1200mm-4ft/7258v?_requestid=805544

Very similar light in both colour temp and brightness.

--
Cheers,

John.

/=================================================================\
| Internode Ltd - http://www.internode.co.uk |
|-----------------------------------------------------------------|
| John Rumm - john(at)internode(dot)co(dot)uk |
\=================================================================/

On Thursday, 9 February 2023 at 20:26:54 UTC, David Paste wrote:
> Currently have two single 70 watt 6 foot fluoros on the kitchen ceiling. 4,000
> Kelvin and apparent;y 6200 lumens each. Thinking of changing them for LED
> battens. Will two of these from Wickes:
>
> https://www.wickes.co.uk/Sylvania-Single-6ft-IP20-Light-Fitting-with-T8-Integrated-LED-Tube---24W/p/185067
>
> be an adequate replacement in terms of light output? they are half the
> output, but I am lead to believe that LED battens have a directionalty which
> makes up for this, not sending light upwards, iirc.

that's about right. Tubes vary a fair bit in output.

> Anyone have any experience with this sort of swap, or any
> recommendations for better light options?
>
> TIA
>
> David Paste.

I wouldn't buy those, they're just over 100lpw, and 200lpw LEDs are already on sale, and will be cheap soon. Better to use something that takes BC bulbs.

In article <0be36754-5380-4867-8cf6-7960bba38c63n@googlegroups.com>,
David Paste <pastedavid@gmail.com> wrote:
> On Thursday, 9 February 2023 at 20:45:12 UTC, charles wrote:

> > I've only changed 4' fluo tubes for LEDs. Ecellent results.

> Cheers! What about the relative brightness? Which LED make did
> you choose?

I had no light meter, I just used my eyes. Make? Whatever TLC supplied me
with.

--
from KT24 in Surrey, England - sent from my RISC OS 4té
"I'd rather die of exhaustion than die of boredom" Thomas Carlyle

I have a single Thorne 40w tube in the kitchen, and do not want to do much
decoration. The tubes are the thicker kind with the bi pin either end, and
am seriously considering LAED replacement of the tube, which seems to
consist of a dummy starter and the led tube. I myself don't need light, but
my PA and friends say the tube is well past its best now and is probably a
waste of current, and the fitting buzzes. Would I be right in simply doing
the swap? I'm assuming these lamps also come in a different range of whites
do they?The original tube says warm white on it apparently.
Brian

--

--:
This newsgroup posting comes to you directly from...
The Sofa of Brian Gaff...
briang1@blueyonder.co.uk
Blind user, so no pictures please
Note this Signature is meaningless.!
"Animal" <tabbypurr@gmail.com> wrote in message
news:689b93e0-518a-405d-a2b9-47584142ab4cn@googlegroups.com...
> On Thursday, 9 February 2023 at 20:26:54 UTC, David Paste wrote:
>> Currently have two single 70 watt 6 foot fluoros on the kitchen ceiling.
>> 4,000
>> Kelvin and apparent;y 6200 lumens each. Thinking of changing them for LED
>> battens. Will two of these from Wickes:
>>
>> https://www.wickes.co.uk/Sylvania-Single-6ft-IP20-Light-Fitting-with-T8-Integrated-LED-Tube---24W/p/185067
>>
>> be an adequate replacement in terms of light output? they are half the
>> output, but I am lead to believe that LED battens have a directionalty
>> which
>> makes up for this, not sending light upwards, iirc.
>
> that's about right. Tubes vary a fair bit in output.
>
>> Anyone have any experience with this sort of swap, or any
>> recommendations for better light options?
>>
>> TIA
>>
>> David Paste.
>
> I wouldn't buy those, they're just over 100lpw, and 200lpw LEDs are
> already on sale, and will be cheap soon. Better to use something that
> takes BC bulbs.

Fredxx <fredxx@spam.uk> wrote:
> On 09/02/2023 22:13, David Paste wrote:
> > On Thursday, 9 February 2023 at 22:03:59 UTC, jkn wrote:
> >
> >> FWIW I recently, in our kitchen, replaced a Ceiling fitting with
> >> (IIRC) 2off 5ft Fluorescent tubes (T8? sorry, can't remember),
> >> with an LED *Panel* light - one of these:
> >>
> >> https://www.lights.co.uk/arcchio-lysander-led-panel-cct-119-cm-58-w-white.html
> >
> > Thanks Jon, that's a bit out of my league though.
>
> This might be in your league:
> https://www.toolstation.com/led-batten-fitting/p37206
>
> or more output:
> https://www.toolstation.com/led-batten-fitting/p54130

I've bought these from CPC and am very happy with them:-

https://cpc.farnell.com/v-tac/667-vt-8-40/grill-fitting-40w-led-120cm-6400k/dp/LA07398?ost=la07398

There's a whole range of lengths and colour temperatures.

--
Chris Green
·

On 09/02/2023 20:26, David Paste wrote:
> Currently have two single 70 watt 6 foot fluoros on the kitchen ceiling. 4,000
> Kelvin and apparent;y 6200 lumens each. Thinking of changing them for LED
> battens. Will two of these from Wickes:
>
> https://www.wickes.co.uk/Sylvania-Single-6ft-IP20-Light-Fitting-with-T8-Integrated-LED-Tube---24W/p/185067
>
> be an adequate replacement in terms of light output? they are half the
> output, but I am lead to believe that LED battens have a directionalty which
> makes up for this, not sending light upwards, iirc.
>
> Anyone have any experience with this sort of swap, or any
> recommendations for better light options?
>
> TIA
>
> David Paste.

Instead of going for battens again, I suggest a couple of circular LCDs.

These ones are very unobtrusive, only 18w, and they give a very good light.

https://www.tlc-direct.co.uk/Products/GLCPL18CT.html

I replaced twin tube 4 ft fluorescents with those, and the LCDs seemed
if anything brighter. TLC also do a 24w version, if you prefer.

On Friday, February 10, 2023 at 9:48:06 AM UTC, Chris Green wrote:
> Fredxx <fre...@spam.uk> wrote:
> > On 09/02/2023 22:13, David Paste wrote:
> > > On Thursday, 9 February 2023 at 22:03:59 UTC, jkn wrote:
> > >
> > >> FWIW I recently, in our kitchen, replaced a Ceiling fitting with
> > >> (IIRC) 2off 5ft Fluorescent tubes (T8? sorry, can't remember),
> > >> with an LED *Panel* light - one of these:
> > >>
> > >> https://www.lights.co.uk/arcchio-lysander-led-panel-cct-119-cm-58-w-white.html
> > >
> > > Thanks Jon, that's a bit out of my league though.
> >
> > This might be in your league:
> > https://www.toolstation.com/led-batten-fitting/p37206
> >
> > or more output:
> > https://www.toolstation.com/led-batten-fitting/p54130
> I've bought these from CPC and am very happy with them:-
>
> https://cpc.farnell.com/v-tac/667-vt-8-40/grill-fitting-40w-led-120cm-6400k/dp/LA07398?ost=la07398
>
> There's a whole range of lengths and colour temperatures.
>
Yes, I also fitted something like that elsewhere, when I was also
doing the kitchen light. also happy with how it's turned out.

Brian, replacing the tube would be the best bet, unless you have someone that can replace the whole fitting for something that looks nicer.

An old fat tube labelled warm white is likely to be halophosphate. These are less efficient & deteriorate faster than the later triphosphors. And warm white was one of the poorer performing tubes to begin with.

Hard to guess what wattage you'd need, anything LED should be a real improvement. Current will still go through the ballast, but less, so less likelihood of buzz.

On Friday, 10 February 2023 at 09:17:32 UTC, Brian Gaff wrote:
> I have a single Thorne 40w tube in the kitchen, and do not want to do much
> decoration. The tubes are the thicker kind with the bi pin either end, and
> am seriously considering LAED replacement of the tube, which seems to
> consist of a dummy starter and the led tube. I myself don't need light, but
> my PA and friends say the tube is well past its best now and is probably a
> waste of current, and the fitting buzzes. Would I be right in simply doing
> the swap? I'm assuming these lamps also come in a different range of whites
> do they?The original tube says warm white on it apparently.
> Brian

In message <f92c4330-2e2d-4bcc-8600-8b2be0fcf012n@googlegroups.com>,
Animal <tabbypurr@gmail.com> writes
>Brian, replacing the tube would be the best bet, unless you have
>someone that can replace the whole fitting for something that looks
>nicer.
>
>An old fat tube labelled warm white is likely to be halophosphate.
>These are less efficient & deteriorate faster than the later
>triphosphors. And warm white was one of the poorer performing tubes to
>begin with.
>
>Hard to guess what wattage you'd need, anything LED should be a real
>improvement. Current will still go through the ballast, but less, so
>less likelihood of buzz.

I've done this with several T8 pin tubes. Not seen a version for the
older wide pin fitting.
>
>
>On Friday, 10 February 2023 at 09:17:32 UTC, Brian Gaff wrote:
>> I have a single Thorne 40w tube in the kitchen, and do not want to do much
>> decoration. The tubes are the thicker kind with the bi pin either end, and
>> am seriously considering LAED replacement of the tube, which seems to
>> consist of a dummy starter and the led tube. I myself don't need light, but
>> my PA and friends say the tube is well past its best now and is probably a
>> waste of current, and the fitting buzzes. Would I be right in simply doing
>> the swap? I'm assuming these lamps also come in a different range of whites
>> do they?The original tube says warm white on it apparently.
>> Brian
>

--
Tim Lamb

On Saturday, 11 February 2023 at 10:08:48 UTC, Tim Lamb wrote:
> In message <f92c4330-2e2d-4bcc...@googlegroups.com>,
> Animal <tabb...@gmail.com> writes
> >Brian, replacing the tube would be the best bet, unless you have
> >someone that can replace the whole fitting for something that looks
> >nicer.
> >
> >An old fat tube labelled warm white is likely to be halophosphate.
> >These are less efficient & deteriorate faster than the later
> >triphosphors. And warm white was one of the poorer performing tubes to
> >begin with.
> >
> >Hard to guess what wattage you'd need, anything LED should be a real
> >improvement. Current will still go through the ballast, but less, so
> >less likelihood of buzz.
> I've done this with several T8 pin tubes. Not seen a version for the
> older wide pin fitting.

T8 & T12 have the same pins

On 10/02/2023 08:05, charles wrote:
> In article <0be36754-5380-4867-8cf6-7960bba38c63n@googlegroups.com>,
> David Paste <pastedavid@gmail.com> wrote:
>> On Thursday, 9 February 2023 at 20:45:12 UTC, charles wrote:
>
>>> I've only changed 4' fluo tubes for LEDs. Ecellent results.
>
>> Cheers! What about the relative brightness? Which LED make did
>> you choose?
>
> I had no light meter, I just used my eyes. Make? Whatever TLC supplied me
> with.
>

Then get an app on your phone.

They are surprisingly accurate when compared to proper calibrated lux
meters.

The same applies to dB meters.

In article <tsaeit$1o6c4$1@dont-email.me>, ARW
<adamwadsworth@blueyonder.co.uk> wrote:
> On 10/02/2023 08:05, charles wrote:
> > In article <0be36754-5380-4867-8cf6-7960bba38c63n@googlegroups.com>,
> > David Paste <pastedavid@gmail.com> wrote:
> >> On Thursday, 9 February 2023 at 20:45:12 UTC, charles wrote:
> >
> >>> I've only changed 4' fluo tubes for LEDs. Ecellent results.
> >
> >> Cheers! What about the relative brightness? Which LED make did you
> >> choose?
> >
> > I had no light meter, I just used my eyes. Make? Whatever TLC supplied
> > me with.
> >

> Then get an app on your phone.

Why should I bother?

> They are surprisingly accurate when compared to proper calibrated lux
> meters.

> The same applies to dB meters.

I have that app.

--
from KT24 in Surrey, England - sent from my RISC OS 4té
"I'd rather die of exhaustion than die of boredom" Thomas Carlyle

In message <c80fd57f-544d-46ed-a80c-c7d71e90983dn@googlegroups.com>,
Animal <tabbypurr@gmail.com> writes
>On Saturday, 11 February 2023 at 10:08:48 UTC, Tim Lamb wrote:
>> In message <f92c4330-2e2d-4bcc...@googlegroups.com>,
>> Animal <tabb...@gmail.com> writes
>> >Brian, replacing the tube would be the best bet, unless you have
>> >someone that can replace the whole fitting for something that looks
>> >nicer.
>> >
>> >An old fat tube labelled warm white is likely to be halophosphate.
>> >These are less efficient & deteriorate faster than the later
>> >triphosphors. And warm white was one of the poorer performing tubes to
>> >begin with.
>> >
>> >Hard to guess what wattage you'd need, anything LED should be a real
>> >improvement. Current will still go through the ballast, but less, so
>> >less likelihood of buzz.
>> I've done this with several T8 pin tubes. Not seen a version for the
>> older wide pin fitting.
>
>T8 & T12 have the same pins

Indeed. I was simply warning that very old fittings may not suit LED
replacements. I have a barn with about 20 twins fitted:-(

--
Tim Lamb

On 12/02/2023 11:09, Tim Lamb wrote:
> In message <c80fd57f-544d-46ed-a80c-c7d71e90983dn@googlegroups.com>,
> Animal <tabbypurr@gmail.com> writes
>> On Saturday, 11 February 2023 at 10:08:48 UTC, Tim Lamb wrote:
>>> In message <f92c4330-2e2d-4bcc...@googlegroups.com>,
>>> Animal <tabb...@gmail.com> writes
>>> >Brian, replacing the tube would be the best bet, unless you have
>>> >someone that can replace the whole fitting for something that looks
>>> >nicer.
>>> >
>>> >An old fat tube labelled warm white is likely to be halophosphate.
>>> >These are less efficient & deteriorate faster than the later
>>> >triphosphors. And warm white was one of the poorer performing tubes to
>>> >begin with.
>>> >
>>> >Hard to guess what wattage you'd need, anything LED should be a real
>>> >improvement. Current will still go through the ballast, but less, so
>>> >less likelihood of buzz.
>>> I've done this with several T8 pin tubes. Not seen a version for the
>>> older wide pin fitting.
>>
>> T8 & T12 have the same pins
>
> Indeed. I was simply warning that very old fittings may not suit LED
> replacements. I have a barn with about 20 twins fitted:-(
>
T8 and T12 have the same fittings - a G13.

The T refers to the fraction of an inch of the lamps diameter

T12s have a diameter of 12/12 and are one inch. T8 have a diameter of
8/12 inches (2/3 of an inch).

As long as you bypass the ballast an LED tube will work in either.

On 12/02/2023 12:26, ARW wrote:
> On 12/02/2023 11:09, Tim Lamb wrote:
>> In message <c80fd57f-544d-46ed-a80c-c7d71e90983dn@googlegroups.com>,
>> Animal <tabbypurr@gmail.com> writes
>>> On Saturday, 11 February 2023 at 10:08:48 UTC, Tim Lamb wrote:
>>>> In message <f92c4330-2e2d-4bcc...@googlegroups.com>,
>>>> Animal <tabb...@gmail.com> writes
>>>> >Brian, replacing the tube would be the best bet, unless you have
>>>> >someone that can replace the whole fitting for something that looks
>>>> >nicer.
>>>> >
>>>> >An old fat tube labelled warm white is likely to be halophosphate.
>>>> >These are less efficient & deteriorate faster than the later
>>>> >triphosphors. And warm white was one of the poorer performing tubes to
>>>> >begin with.
>>>> >
>>>> >Hard to guess what wattage you'd need, anything LED should be a real
>>>> >improvement. Current will still go through the ballast, but less, so
>>>> >less likelihood of buzz.
>>>> I've done this with several T8 pin tubes. Not seen a version for the
>>>> older wide pin fitting.
>>>
>>> T8 & T12 have the same pins
>>
>> Indeed. I was simply warning that very old fittings may not suit LED
>> replacements. I have a barn with about 20 twins fitted:-(
>>
> T8 and T12 have the same fittings - a G13.
>
> The T refers to the fraction of an inch of the lamps diameter
>
> T12s have a diameter of 12/12 and are one inch. T8 have a diameter of
> 8/12 inches (2/3 of an inch).
>
> As long as you bypass the ballast an LED tube will work in either.

All correct, except that the T numbers are in 1/8s of an inch, so T8 is
1" and T12 is 1.5".

In message <tsalth$1p45k$1@dont-email.me>, ARW
<adamwadsworth@blueyonder.co.uk> writes
>On 12/02/2023 11:09, Tim Lamb wrote:
>> In message <c80fd57f-544d-46ed-a80c-c7d71e90983dn@googlegroups.com>,
>>Animal <tabbypurr@gmail.com> writes
>>> On Saturday, 11 February 2023 at 10:08:48 UTC, Tim Lamb wrote:
>>>> In message <f92c4330-2e2d-4bcc...@googlegroups.com>,
>>>> Animal <tabb...@gmail.com> writes
>>>> >Brian, replacing the tube would be the best bet, unless you have
>>>> >someone that can replace the whole fitting for something that looks
>>>> >nicer.
>>>> >
>>>> >An old fat tube labelled warm white is likely to be halophosphate.
>>>> >These are less efficient & deteriorate faster than the later
>>>> >triphosphors. And warm white was one of the poorer performing tubes to
>>>> >begin with.
>>>> >
>>>> >Hard to guess what wattage you'd need, anything LED should be a real
>>>> >improvement. Current will still go through the ballast, but less, so
>>>> >less likelihood of buzz.
>>>> I've done this with several T8 pin tubes. Not seen a version for the
>>>> older wide pin fitting.
>>>
>>> T8 & T12 have the same pins
>> Indeed. I was simply warning that very old fittings may not suit LED
>>replacements. I have a barn with about 20 twins fitted:-(
>>
>T8 and T12 have the same fittings - a G13.
>
>The T refers to the fraction of an inch of the lamps diameter
>
>T12s have a diameter of 12/12 and are one inch. T8 have a diameter of
>8/12 inches (2/3 of an inch).
>
>As long as you bypass the ballast an LED tube will work in either.

Yes. The issue is the pin spacing on very old fittings.
>

--
Tim Lamb

On Sunday, 12 February 2023 at 13:47:35 UTC, Tim Lamb wrote:
> In message <tsalth$1p45k$1...@dont-email.me>, ARW
> <adamwa...@blueyonder.co.uk> writes
> >On 12/02/2023 11:09, Tim Lamb wrote:
> >> In message <c80fd57f-544d-46ed...@googlegroups.com>,
> >>Animal <tabb...@gmail.com> writes
> >>> On Saturday, 11 February 2023 at 10:08:48 UTC, Tim Lamb wrote:
> >>>> In message <f92c4330-2e2d-4bcc...@googlegroups.com>,
> >>>> Animal <tabb...@gmail.com> writes
> >>>> >Brian, replacing the tube would be the best bet, unless you have
> >>>> >someone that can replace the whole fitting for something that looks
> >>>> >nicer.
> >>>> >
> >>>> >An old fat tube labelled warm white is likely to be halophosphate.
> >>>> >These are less efficient & deteriorate faster than the later
> >>>> >triphosphors. And warm white was one of the poorer performing tubes to
> >>>> >begin with.
> >>>> >
> >>>> >Hard to guess what wattage you'd need, anything LED should be a real
> >>>> >improvement. Current will still go through the ballast, but less, so
> >>>> >less likelihood of buzz.
> >>>> I've done this with several T8 pin tubes. Not seen a version for the
> >>>> older wide pin fitting.
> >>>
> >>> T8 & T12 have the same pins
> >> Indeed. I was simply warning that very old fittings may not suit LED
> >>replacements. I have a barn with about 20 twins fitted:-(
> >>
> >T8 and T12 have the same fittings - a G13.
> >
> >The T refers to the fraction of an inch of the lamps diameter
> >
> >T12s have a diameter of 12/12 and are one inch. T8 have a diameter of
> >8/12 inches (2/3 of an inch).
> >
> >As long as you bypass the ballast an LED tube will work in either.
> Yes. The issue is the pin spacing on very old fittings.

I'm not aware of any different pin spacing used with T8 & T12. Even smaller tubes did use a different pin layout, but never T8, T12. T12 originally used BC caps, but hardly any of those fittings remain.

Assuming it's a T12 setup Brian is unlikely to run into trouble. If he does he might need to bypass the choke, or other ballast. I doubt there are any filament bulb ballasted luminaires left in the wild.