Does anyone have any idea if an LED bulb will work in a dawn till dusk lantern?

Light is off during the day. Light lights at about 1/3 brightness at dusk and stays that way unless triggered by the motion sensor at which point it is fully lit.
Googled this to death and cannot find an answer. Contacted numerous led bulb shops via email but all seam to forget to read the question and point me to an led that is obviously useless for the situation.

In article ,
wrote:
Does anyone have any idea if an LED bulb will work in a dawn till dusk
lantern?

Light is off during the day. Light lights at about 1/3 brightness at
dusk and stays that way unless triggered by the motion sensor at which
point it is fully lit. Googled this to death and cannot find an answer.
Contacted numerous led bulb shops via email but all seam to forget to
read the question and point me to an led that is obviously useless for
the situation.

Impossible to say without knowing how the existing lamp dims. There are
LEDs which dim with a standard (trailing edge) mains dimmer these days.

--
*If at first you do succeed, try not to look too astonished.

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

Maybe the answer is something as simple as two bulbs, on when its dark, the
dimmer of the two, the other more like a flood is triggered by the pir?
Brian

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"Dave Plowman (News)" wrote in message
...
In article ,
wrote:
Does anyone have any idea if an LED bulb will work in a dawn till dusk
lantern?

Light is off during the day. Light lights at about 1/3 brightness at
dusk and stays that way unless triggered by the motion sensor at which
point it is fully lit. Googled this to death and cannot find an answer.
Contacted numerous led bulb shops via email but all seam to forget to
read the question and point me to an led that is obviously useless for
the situation.

Impossible to say without knowing how the existing lamp dims. There are
LEDs which dim with a standard (trailing edge) mains dimmer these days.

--
*If at first you do succeed, try not to look too astonished.

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

wrote in message
...
Does anyone have any idea if an LED bulb will work in a dawn till dusk
lantern?

Light is off during the day. Light lights at about 1/3 brightness at dusk
and stays that way unless triggered by the motion sensor at which point it
is fully lit.
Googled this to death and cannot find an answer. Contacted numerous led
bulb shops via email but all seam to forget to read the question and point
me to an led that is obviously useless for the situation.

I'd be interested in this also. Mine takes 60W ES.
I know it dims using a FET but that's all I know.

bm wrote:
I know it dims using a FET but that's all I know.

Are you sure? very strange to use an FET in an AC power circuit.

"Bob Minchin" wrote in message
...
bm wrote:
I know it dims using a FET but that's all I know.

Are you sure? very strange to use an FET in an AC power circuit.

I should correct that, Bob. MINE uses a FET
Leastways, that's what I replace every time the bulb kills it.
IRF 840

bm wrote:
"Bob Minchin" wrote in message
...
bm wrote:
I know it dims using a FET but that's all I know.

Are you sure? very strange to use an FET in an AC power circuit.

I should correct that, Bob. MINE uses a FET
Leastways, that's what I replace every time the bulb kills it.
IRF 840



OK fairy-nuff
Bob

"Bob Minchin" wrote in message
...
bm wrote:
"Bob Minchin" wrote in message
...
bm wrote:
I know it dims using a FET but that's all I know.

Are you sure? very strange to use an FET in an AC power circuit.

I should correct that, Bob. MINE uses a FET
Leastways, that's what I replace every time the bulb kills it.
IRF 840



OK fairy-nuff
Bob

Acherley, when it finally goes tits up, I can't see a replacement.
It activates between dusk and dawn at variable settable brightness and comes
on full tilt via PIR for a settable time.
Got it from B&Q ~8 years back, can't see one now.

On Wednesday, 26 October 2016 18:24:23 UTC+1, bm wrote:
"Bob Minchin" wrote in message
...
bm wrote:
I know it dims using a FET but that's all I know.

Are you sure? very strange to use an FET in an AC power circuit.

I should correct that, Bob. MINE uses a FET
Leastways, that's what I replace every time the bulb kills it.
IRF 840

That's what I couldn't understand when DP said when my dimmer blew I should replace the traics as a DIY job, but if I did they'd blow again within 5 mins of turning the lights back on again, I even said I didn;t want to get in to a casuality loop.
SO I decided to buy a new dimmer of the correct type to dim LEDs rather than keep repairing the one that doesnlt work.
Aslso LEDs really only work on DC.

In article ,
whisky-dave wrote:
On Wednesday, 26 October 2016 18:24:23 UTC+1, bm wrote:
"Bob Minchin" wrote in message
...
bm wrote:
I know it dims using a FET but that's all I know.

Are you sure? very strange to use an FET in an AC power circuit.

I should correct that, Bob. MINE uses a FET
Leastways, that's what I replace every time the bulb kills it.
IRF 840

That's what I couldn't understand when DP said when my dimmer blew I
should replace the traics as a DIY job, but if I did they'd blow again
within 5 mins of turning the lights back on again, I even said I didn;t
want to get in to a casuality loop. SO I decided to buy a new dimmer of
the correct type to dim LEDs rather than keep repairing the one that
doesnlt work. Aslso LEDs really only work on DC.

As usual you've made half of that lot up.

I actually said that it's quite common for a dimmer to fail when a
tungsten bulb blows. They short circuit momentarily. And even if the MCB
trips, the dimmer can be toast.
Hence replacing the triac. No reason at all that triac will fail in 5
minutes unless another bulb blows. And not every bulb will fail in this
way anyway.

--
*After the game, the King and the pawn go into the same box.

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

On 26/10/2016 14:41, wrote:
Does anyone have any idea if an LED bulb will work in a dawn till dusk lantern?

A truly dimmable one ought to, but a bog standard one will not.

The bog standard ones will draw ever more current to deliver near
constant light output when you try to dim them until something breaks.

Light is off during the day. Light lights at about 1/3 brightness at dusk and
stays that way unless triggered by the motion sensor at which point
it is fully lit.
Googled this to death and cannot find an answer. Contacted numerous led bulb shops
via email but all seam to forget to read the question and point me to
an led that
is obviously useless for the situation.



--
Regards,
Martin Brown

On Wednesday, 26 October 2016 14:41:03 UTC+1, wrote:
Does anyone have any idea if an LED bulb will work in a dawn till dusk lantern?

Light is off during the day. Light lights at about 1/3 brightness at dusk and stays that way unless triggered by the motion sensor at which point it is fully lit.
Googled this to death and cannot find an answer. Contacted numerous led bulb shops via email but all seam to forget to read the question and point me to an led that is obviously useless for the situation.

depends on the LED's PSU type, the dimming method and the PIR.


NT

wrote in
:

On Wednesday, 26 October 2016 14:41:03 UTC+1,
wrote:
Does anyone have any idea if an LED bulb will work in a dawn till
dusk lantern?

Light is off during the day. Light lights at about 1/3 brightness at
dusk and stays that way unless triggered by the motion sensor at
which point it is fully lit. Googled this to death and cannot find an
answer. Contacted numerous led bulb shops via email but all seam to
forget to read the question and point me to an led that is obviously
useless for the situation.

depends on the LED's PSU type, the dimming method and the PIR.


NT


I would give up - it is an oddity that never made it to mass market.
Unfortunately I can only suggest you replace it with 2 fittings - a Dusk to
Dawn lamp and a PIR Flood.

DerbyBorn wrote:

I would give up - it is an oddity that never made it to mass market.

Not that odd, I bought a combined PIR/dusk sensor from screwfix about
ten years ago, IIRC it specified incandescent lamp only for the
dusk-to-dawn output which I presumed was half-wave rectified while the
PIR output was full mains ... anyway UV weakened the plastic lens and
water got in and killed it.

On Thursday, 27 October 2016 09:44:20 UTC+1, DerbyBorn wrote:
tabbypurr wrote in
:

On Wednesday, 26 October 2016 14:41:03 UTC+1,
wrote:
Does anyone have any idea if an LED bulb will work in a dawn till
dusk lantern?

Light is off during the day. Light lights at about 1/3 brightness at
dusk and stays that way unless triggered by the motion sensor at
which point it is fully lit. Googled this to death and cannot find an
answer. Contacted numerous led bulb shops via email but all seam to
forget to read the question and point me to an led that is obviously
useless for the situation.

depends on the LED's PSU type, the dimming method and the PIR.

I would give up - it is an oddity that never made it to mass market.
Unfortunately I can only suggest you replace it with 2 fittings - a Dusk to
Dawn lamp and a PIR Flood.

There are other ways too.


NT

On Thu, 27 Oct 2016 08:44:18 GMT, DerbyBorn wrote:

wrote in
:

On Wednesday, 26 October 2016 14:41:03 UTC+1,
wrote:
Does anyone have any idea if an LED bulb will work in a dawn till
dusk lantern?

Light is off during the day. Light lights at about 1/3 brightness at
dusk and stays that way unless triggered by the motion sensor at
which point it is fully lit. Googled this to death and cannot find an
answer. Contacted numerous led bulb shops via email but all seam to
forget to read the question and point me to an led that is obviously
useless for the situation.

depends on the LED's PSU type, the dimming method and the PIR.

NT


I would give up - it is an oddity that never made it to mass market.
Unfortunately I can only suggest you replace it with 2 fittings - a Dusk to
Dawn lamp and a PIR Flood.

Don't know if this would work with a dimmer: use a dimmable LED set on a
dimmer to the level you want. Use the PIR to bypass the dimmer, i.e. the
PIR, when on, puts full voltage onto the output of the dimmer.
If this would kill the dimmer it could be an expensive experiment.
--
Peter.
The gods will stay away
whilst religions hold sway