Adapting white LEDs as festoon bulbs?
 

Where 5mm is the maximum dimension / available space of the original bulb so
you cannot turn aroud the LED. Would be useful for replacing awkward voltage
festoon bulbs.
The maximum beam of 5mm LEDs is axially but how to convert to transverse?
Grind an angle to the dome and melt on some mylar?
Wrap whole LED in mylar except for an axial slot?
Abraid the LED all round to make translucent rather than clear?

Then adapting AC or DC supply to suit

--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/

Adapting white LEDs as festoon bulbs?
 

In article ,
N Cook wrote:
Where 5mm is the maximum dimension / available space of the original
bulb so you cannot turn aroud the LED. Would be useful for replacing
awkward voltage festoon bulbs. The maximum beam of 5mm LEDs is axially
but how to convert to transverse? Grind an angle to the dome and melt on
some mylar? Wrap whole LED in mylar except for an axial slot? Abraid the
LED all round to make translucent rather than clear?

Are you restricted to 5mm types? There are also very short ones available.

Problem with LEDs is the diabolical 'colour' if used as a replacement for
tungsten. Which may not matter, of course.

--
*I'm pretty sure that sex is better than logic, but I can't prove it.

Dave Plowman London SW
To e-mail, change noise into sound.

Adapting white LEDs as festoon bulbs?
 

N Cook wrote:
Where 5mm is the maximum dimension / available space of the original bulb so
you cannot turn aroud the LED. Would be useful for replacing awkward voltage
festoon bulbs.
The maximum beam of 5mm LEDs is axially but how to convert to transverse?
Grind an angle to the dome and melt on some mylar?
Wrap whole LED in mylar except for an axial slot?
Abraid the LED all round to make translucent rather than clear?

Then adapting AC or DC supply to suit

You can buy 12v led festoon bulbs, Google for led car accessories.

Ron

Adapting white LEDs as festoon bulbs?
 

"N Cook" wrote in message
...
Where 5mm is the maximum dimension / available space of the original bulb
so
you cannot turn aroud the LED. Would be useful for replacing awkward
voltage
festoon bulbs.

**Nonsense. LEDs are available in a wide variety of shapes and sizes. Many
are much smaller than 5mm.

The maximum beam of 5mm LEDs is axially but how to convert to transverse?

**Again, wrong. Lumiled (and others) manufacture LEDs with a 120o (or more)
light spread.

Grind an angle to the dome and melt on some mylar?
Wrap whole LED in mylar except for an axial slot?
Abraid the LED all round to make translucent rather than clear?

Then adapting AC or DC supply to suit

**Try not to re-invent the wheel. Look at the alternatives. They are easy
enough to find.

Trevor Wilson

Adapting white LEDs as festoon bulbs?
 

"N Cook" wrote in message
...
Where 5mm is the maximum dimension / available space of the original bulb
so
you cannot turn aroud the LED. Would be useful for replacing awkward
voltage
festoon bulbs.
The maximum beam of 5mm LEDs is axially but how to convert to transverse?
Grind an angle to the dome and melt on some mylar?
Wrap whole LED in mylar except for an axial slot?
Abraid the LED all round to make translucent rather than clear?

Then adapting AC or DC supply to suit



While I've built LED replacements in a pinch, this is one of those things
where it makes more sense to buy a ready made LED retrofit lamp than to try
to build something, unless maybe you already have a bunch of LEDs you want
to put to use.

Adapting white LEDs as festoon bulbs?
 

James Sweet wrote in message
news:lJizj.3575$W%2.1259@trndny04...

"N Cook" wrote in message
...
Where 5mm is the maximum dimension / available space of the original
bulb
so
you cannot turn aroud the LED. Would be useful for replacing awkward
voltage
festoon bulbs.
The maximum beam of 5mm LEDs is axially but how to convert to
transverse?
Grind an angle to the dome and melt on some mylar?
Wrap whole LED in mylar except for an axial slot?
Abraid the LED all round to make translucent rather than clear?

Then adapting AC or DC supply to suit



While I've built LED replacements in a pinch, this is one of those things
where it makes more sense to buy a ready made LED retrofit lamp than to
try
to build something, unless maybe you already have a bunch of LEDs you want
to put to use.



I have 27 salvaged 35mA ,5mm white o/p LEDs and no 3mm, and every now and
then need a festoon bulb that is usually not 12V.

The bluishness can be compensated for to a certain extent by coating with
varnish with a tiny spot of red dye mixed in.

So far the best conversion seems to be 1.25 inch fuse glass barrel with ends
removed, scored and cut down to size , heated and pushed over an LED and an
oval of muylar glued into the open end, forming a 45 degree or so mirror.
Placing back the fuse ends for soldering to, with wires taken external to
the barrel..
Then a wash of vaguely red tinted varnish over the glass.

--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/

Adapting white LEDs as festoon bulbs?
 

"N Cook" wrote in message
...
Where 5mm is the maximum dimension / available space of the original bulb
so
you cannot turn aroud the LED. Would be useful for replacing awkward
voltage
festoon bulbs.
The maximum beam of 5mm LEDs is axially but how to convert to transverse?
Grind an angle to the dome and melt on some mylar?
Wrap whole LED in mylar except for an axial slot?
Abraid the LED all round to make translucent rather than clear?

Then adapting AC or DC supply to suit

--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/



Question...what the heck is a "festoon", and why does it need bulbs? Are we
talking outdoor lighting?

Adapting white LEDs as festoon bulbs?
 

Question...what the heck is a "festoon", and why does it need bulbs? Are
we
talking outdoor lighting?



Double ended tubular bulbs, I think it's primarily British terminology. Many
automotive dome lights use them.

Adapting white LEDs as festoon bulbs?
 

"James Sweet" wrote in message
news:yymzj.4901$oy2.1585@trndny07...


Question...what the heck is a "festoon", and why does it need bulbs? Are
we
talking outdoor lighting?



Double ended tubular bulbs, I think it's primarily British terminology.
Many automotive dome lights use them.


OH. Ok.. The dictonary wasn't helping because the defition for festoon is
either festive deocoration or feast.

Adapting white LEDs as festoon bulbs?
 

Michael Kennedy wrote in message
...

"James Sweet" wrote in message
news:yymzj.4901$oy2.1585@trndny07...


Question...what the heck is a "festoon", and why does it need bulbs?
Are
we
talking outdoor lighting?



Double ended tubular bulbs, I think it's primarily British terminology.
Many automotive dome lights use them.


OH. Ok.. The dictonary wasn't helping because the defition for festoon is
either festive deocoration or feast.




So what is the USA name for filament bulbs that look like 1.25 inch or 20mm
fuses, so I can add to my "translator" file
http://www.divdev.fsnet.co.uk/tool_terms.htm

--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/

Adapting white LEDs as festoon bulbs?
 

In article ,
Ron(UK) wrote:
N Cook wrote:
Where 5mm is the maximum dimension / available space of the original
bulb so you cannot turn aroud the LED. Would be useful for replacing
awkward voltage festoon bulbs. The maximum beam of 5mm LEDs is axially
but how to convert to transverse? Grind an angle to the dome and melt
on some mylar? Wrap whole LED in mylar except for an axial slot?
Abraid the LED all round to make translucent rather than clear?

Then adapting AC or DC supply to suit

You can buy 12v led festoon bulbs, Google for led car accessories.

The ones I've seen are of a larger diameter than a 6 watt festoon type.
10mm seems to be the common diameter - so a replacement for 10/18w types.
I suspect by the text it's the smaller one Mr Cook wants to replace -
meter lights etc?

--
*Funny, I don't remember being absent minded.

Dave Plowman London SW
To e-mail, change noise into sound.

Adapting white LEDs as festoon bulbs?
 

N Cook wrote:
James Sweet wrote in message
news:lJizj.3575$W%2.1259@trndny04...
"N Cook" wrote in message
...
Where 5mm is the maximum dimension / available space of the original
bulb
so
you cannot turn aroud the LED. Would be useful for replacing awkward
voltage
festoon bulbs.
The maximum beam of 5mm LEDs is axially but how to convert to
transverse?
Grind an angle to the dome and melt on some mylar?
Wrap whole LED in mylar except for an axial slot?
Abraid the LED all round to make translucent rather than clear?

Then adapting AC or DC supply to suit


While I've built LED replacements in a pinch, this is one of those things
where it makes more sense to buy a ready made LED retrofit lamp than to
try
to build something, unless maybe you already have a bunch of LEDs you want
to put to use.



I have 27 salvaged 35mA ,5mm white o/p LEDs and no 3mm, and every now and
then need a festoon bulb that is usually not 12V.

The bluishness can be compensated for to a certain extent by coating with
varnish with a tiny spot of red dye mixed in.

So far the best conversion seems to be 1.25 inch fuse glass barrel with ends
removed, scored and cut down to size , heated and pushed over an LED and an
oval of muylar glued into the open end, forming a 45 degree or so mirror.
Placing back the fuse ends for soldering to, with wires taken external to
the barrel..
Then a wash of vaguely red tinted varnish over the glass.


Or you could spend £1.99 and buy one with three white leds ready made.

Adapting white LEDs as festoon bulbs?
 

N Cook wrote:
Michael Kennedy wrote in message
...
"James Sweet" wrote in message
news:yymzj.4901$oy2.1585@trndny07...
Question...what the heck is a "festoon", and why does it need bulbs?
Are
we
talking outdoor lighting?


Double ended tubular bulbs, I think it's primarily British terminology.
Many automotive dome lights use them.

OH. Ok.. The dictonary wasn't helping because the defition for festoon is
either festive deocoration or feast.




So what is the USA name for filament bulbs that look like 1.25 inch or 20mm
fuses, so I can add to my "translator" file
http://www.divdev.fsnet.co.uk/tool_terms.htm

Domelight

Ron

Adapting white LEDs as festoon bulbs?
 

Dave Plowman (News) wrote in message
...
In article ,
Ron(UK) wrote:
N Cook wrote:
Where 5mm is the maximum dimension / available space of the original
bulb so you cannot turn aroud the LED. Would be useful for replacing
awkward voltage festoon bulbs. The maximum beam of 5mm LEDs is axially
but how to convert to transverse? Grind an angle to the dome and melt
on some mylar? Wrap whole LED in mylar except for an axial slot?
Abraid the LED all round to make translucent rather than clear?

Then adapting AC or DC supply to suit

You can buy 12v led festoon bulbs, Google for led car accessories.

The ones I've seen are of a larger diameter than a 6 watt festoon type.
10mm seems to be the common diameter - so a replacement for 10/18w types.
I suspect by the text it's the smaller one Mr Cook wants to replace -
meter lights etc?

--
*Funny, I don't remember being absent minded.

Dave Plowman London SW
To e-mail, change noise into sound.

With the larger ones there is no great problem finding some sort of filament
bulb to replace it with.
But small diameter , high wattage ones, like the those built into meters are
a different matter.
3mm LEDs, in there, would give a spot light which would not be distributed
by the white plastic housing, giving a very poor meter illumination

I've never tried melting an LED before , not that easy.

In the process I found that filling the glass barrel with translucent hot
melt glue gives quite a good linear diffused illumination.
Air entrained clear glue or plastic would probably be a bit better but
hot-melt is quite convenient.

Domelamp =USA= barrel filament bulb, or the automotive housing where they
are found ?


--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/

Adapting white LEDs as festoon bulbs?
 

The point of a festoon bulb, or the wire-ended ones, is you can put in a lot
of wattage, get out a lot of illumination, by using a package that is quite
large in one dimension, only, unlike having to expand all 3 dimensions of a
globe bulb.

--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/

Adapting white LEDs as festoon bulbs?
 

Comparison of 2 in series
http://home.graffiti.net/diverse:gra...estoon_LED.jpg
as original LED and then a half length, 1 1/4 inch fuse barrel filled with
hot-melt glue.

A bit more scientifically measuring the original transverse, at a given
distance over matt black carbon/foam , was about 30 lux, modified LED about
180 lux and for comparison a 12V 6W festoon lamp at the same distance about
1000 lux.

Comparison of illumination , by readable text, at a distance of a foot I
would say the modified LED was equivalent to the 12V bulb running at 0.1
amps rather than 0.2A.
So at least 2 such LEDs at 30mA to have any chance of equalling the
illumination of the festoon.
So a white LED at each end of a filled glass barrel , at least , needed to
equal.

The mylar mirror just gave 2 bright spots rather than an illuminator, but
"frosting" of the glass may still work


--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/

Adapting white LEDs as festoon bulbs?
 

Ron(UK) wrote:

N Cook wrote:


snip

So what is the USA name for filament bulbs that look like 1.25 inch or
20mm
fuses, so I can add to my "translator" file
http://www.divdev.fsnet.co.uk/tool_terms.htm


Domelight

Cartridge Lamp

Michael

Adapting white LEDs as festoon bulbs?
 

In article , "N Cook" wrote:
James Sweet wrote in message
news:lJizj.3575$W%2.1259@trndny04...

"N Cook" wrote in message
...
Where 5mm is the maximum dimension / available space of the original
bulb
so
you cannot turn aroud the LED. Would be useful for replacing awkward
voltage
festoon bulbs.
The maximum beam of 5mm LEDs is axially but how to convert to
transverse?
Grind an angle to the dome and melt on some mylar?
Wrap whole LED in mylar except for an axial slot?
Abraid the LED all round to make translucent rather than clear?

Then adapting AC or DC supply to suit



While I've built LED replacements in a pinch, this is one of those things
where it makes more sense to buy a ready made LED retrofit lamp than to
try
to build something, unless maybe you already have a bunch of LEDs you want
to put to use.



I have 27 salvaged 35mA ,5mm white o/p LEDs and no 3mm, and every now and
then need a festoon bulb that is usually not 12V.

The bluishness can be compensated for to a certain extent by coating with
varnish with a tiny spot of red dye mixed in.

I used to have the paints for coating lamps or glass from craft stores.
I'll have to try your mixture for led's. Warm white led's are becomming more
common, and are required for illumination of different things in the home.
My current need is making under cabinet kitchen lamps.

greg

Adapting white LEDs as festoon bulbs?
 

msg wrote in message
...
Ron(UK) wrote:

N Cook wrote:


snip

So what is the USA name for filament bulbs that look like 1.25 inch or
20mm
fuses, so I can add to my "translator" file
http://www.divdev.fsnet.co.uk/tool_terms.htm


Domelight

Cartridge Lamp

Michael

Not according to Goofle/images
"Cartridge Lamp"
79 hits , only 1 in first 2 pages that I would call a festoon bulb

put "festoon bulb", 477 hits
in google/images and first page is nearly full of them


--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/

Adapting white LEDs as festoon bulbs?
 

N Cook wrote:
msg wrote in message
...
Ron(UK) wrote:

N Cook wrote:

snip
So what is the USA name for filament bulbs that look like 1.25 inch or
20mm
fuses, so I can add to my "translator" file
http://www.divdev.fsnet.co.uk/tool_terms.htm

Domelight
Cartridge Lamp

Michael

Not according to Goofle/images
"Cartridge Lamp"
79 hits , only 1 in first 2 pages that I would call a festoon bulb

put "festoon bulb", 477 hits
in google/images and first page is nearly full of them

There`s plenty if you Google for Dome Light bulb I bet


I`ve always thought of a festoon lamp as having metal endcaps, we used
them a lot on slot machines back in the 60`s. I`ve never thought of
wire ended miniature tubular lamps as festoons.

There was at one time available a flexible strip containing lots of back
to back clips (like open fuseholders) specifically for making up
"festoons" of lighting - I`m going back to the days of the old
RadioSpares catalogue here. I always imagined that`s where the name
festoon lamp came from.

Ron(UK)

Adapting white LEDs as festoon bulbs?
 

N Cook wrote:
msg wrote in message
...
Ron(UK) wrote:

N Cook wrote:

snip
So what is the USA name for filament bulbs that look like 1.25 inch or
20mm
fuses, so I can add to my "translator" file
http://www.divdev.fsnet.co.uk/tool_terms.htm

Domelight
Cartridge Lamp

Michael

Not according to Goofle/images
"Cartridge Lamp"
79 hits , only 1 in first 2 pages that I would call a festoon bulb

put "festoon bulb", 477 hits
in google/images and first page is nearly full of them


--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/




I've heard them called cartridge lamps, or as commonly; 'fuse bulbs'.
The dome light moniker is simply an application, which may have taken on
some weight as a common description of the type.

But 'festoon' is not a term I've *ever* heard to describe them on this
side of the lake. Sounds vaguely silly...like 'pantaloons'.

Google does indeed provide many hits for 'festoon lamp'; but most hits
seem to reference the UK, with a few US distributers. Interestingly,
the first hit also references 'fuse lamp'; and many, many (the majority,
maybe) are for LED replacements.

jak

jak

Adapting white LEDs as festoon bulbs?
 

In article , GregS
wrote:
The bluishness can be compensated for to a certain extent by coating
with varnish with a tiny spot of red dye mixed in.

I used to have the paints for coating lamps or glass from craft stores.

There's a big difference between tinting tungsten etc and LED. Tungsten is
continuous spectrum so a coloured filter merely reduces the output at that
wavelength. Trouble with LED is parts of the spectrum are missing so you
can't reduce others to boost what isn't there.

I'll have to try your mixture for led's. Warm white led's are becomming
more common, and are required for illumination of different things in
the home. My current need is making under cabinet kitchen lamps.

The last warm white LEDs I tried a few months ago were a bilious 'shade'
of green. IMHO we're still a long way from LED being as 'kind' as tungsten
for domestic use.

--
*Give me ambiguity or give me something else.

Dave Plowman London SW
To e-mail, change noise into sound.

Adapting white LEDs as festoon bulbs?
 

The last warm white LEDs I tried a few months ago were a bilious 'shade'
of green. IMHO we're still a long way from LED being as 'kind' as tungsten
for domestic use.


White LEDs are blue emitting chips coated with a phosphor that converts some
of the blue light to other wavelengths. It's unlikely that LEDs will ever
have the smooth continuous spectrum that tungsten provides, but I do suspect
they will eventually reach the quality of better fluorescent lamps.

Adapting white LEDs as festoon bulbs?
 

White LEDs are blue emitting chips coated with a phosphor
that converts some of the blue light to other wavelengths.
It's unlikely LEDs will ever have the continuous spectrum
tungsten provides, but I suspect they will eventually reach
the quality of better fluorescent lamps.

That's a very high standard. The better CLs can be used with photographic
cameras -- film and digital -- and produce outstanding results. (I own
several Lowel ego lights.)

Adapting white LEDs as festoon bulbs?
 

In article , "Dave Plowman (News)" wrote:
In article , GregS
wrote:
The bluishness can be compensated for to a certain extent by coating
with varnish with a tiny spot of red dye mixed in.

I used to have the paints for coating lamps or glass from craft stores.

There's a big difference between tinting tungsten etc and LED. Tungsten is
continuous spectrum so a coloured filter merely reduces the output at that
wavelength. Trouble with LED is parts of the spectrum are missing so you
can't reduce others to boost what isn't there.

I'll have to try your mixture for led's. Warm white led's are becomming
more common, and are required for illumination of different things in
the home. My current need is making under cabinet kitchen lamps.

The last warm white LEDs I tried a few months ago were a bilious 'shade'
of green. IMHO we're still a long way from LED being as 'kind' as tungsten
for domestic use.


I last bought about 8- 3 watt Luxeon's for a lighting project. I decided i
didn't want a bluish tint, but I will try out some of the high powered warm
whites. Less lumens and harder to get.

greg

Adapting white LEDs as festoon bulbs?
 

I last bought about 8- 3 watt Luxeon's for a lighting project. I decided i
didn't want a bluish tint, but I will try out some of the high powered
warm
whites. Less lumens and harder to get.



I've seen two types of warm white LEDs. One looked pretty good, and another
had the icky tint another poster mentioned. I'm sure both depreciate towards
less desireable color as the phosphor ages but I have no long term
experience with the warm ones.

Adapting white LEDs as festoon bulbs?
 

In article ,
William Sommerwerck wrote:
White LEDs are blue emitting chips coated with a phosphor
that converts some of the blue light to other wavelengths.
It's unlikely LEDs will ever have the continuous spectrum
tungsten provides, but I suspect they will eventually reach
the quality of better fluorescent lamps.

That's a very high standard. The better CLs can be used with photographic
cameras -- film and digital -- and produce outstanding results. (I own
several Lowel ego lights.)

Yes - fluorescent soft lights are pretty popular for filming these days.
Have the added advantage of maintaining colour temperature pretty well
when dimmed.
Most simply don't realise the wide range of specialist tubes and base
their poor opinion on the commonly available ones.

--
*Husbands should come with instructions

Dave Plowman London SW
To e-mail, change noise into sound.

Adapting white LEDs as festoon bulbs?
 

On Tue, 4 Mar 2008 16:11:57 -0000, "N Cook" put
finger to keyboard and composed:

Where 5mm is the maximum dimension / available space of the original bulb so
you cannot turn aroud the LED. Would be useful for replacing awkward voltage
festoon bulbs.
The maximum beam of 5mm LEDs is axially but how to convert to transverse?

Adapt an LED from a solar garden light ???

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.