2 Any LED bulb can be safely dimmed with a trailing edge dimmer whether specified as being suitable for dimming or not?
Would I be right in assuming:-
1 So-called dimmable bulbs are designed to work with ordinary incandescent (i.e.
leading egde) dimmers?
2 Any LED bulb can be safely dimmed with a trailing edge dimmer whether specified as being suitable for dimming or not?
All of our LED bulbs were purchased as dimmable, but I found out that Screwfix
do trailing edge dimmers only a little more expensive than a standard dimmer so
I fitted those and have had no trouble at all.
On 09/11/2022 17:36, Woody wrote:
2 Any LED bulb can be safely dimmed with a trailing edge dimmer whetherNon dimmable LEDs are designed to give a constant light output over a wide range of input voltages, so as you dim them, they stay bright until you
specified as being suitable for dimming or not?
drop the voltage too low, when they tend to cut off.
--
Tciao for Now!
John.
That is right, to a degree. They contain a switch mode psu
Can anyone give me a <definitive> answer to this one please?
One can easily buy 'dimmable' LED bulbs, but there are many bulbs that
are stated to be non-dimmable.
Would I be right in assuming:-
1 So-called dimmable bulbs are designed to work with ordinary
incandescent (i.e. leading egde) dimmers?
2 Any LED bulb can be safely dimmed with a trailing edge dimmer whether specified as being suitable for dimming or not?
All of our LED bulbs were purchased as dimmable, but I found out that Screwfix do trailing edge dimmers only a little more expensive than a standard dimmer so I fitted those and have had no trouble at all.
Thoughts of the group would be much appreciated.
That is right, to a degree. They contain a switch mode psu, similar to the sort you get in those plug inusb power supplies. However though they are quite efficient they are dissipating more power on the higher voltages, but not as much as, say, an older type voltage regulator does.
I don't use lights much these days, but I have had friends complaiing at this sort of thing.
One day all lighting circuits will be low voltage DC. Then we can use
PWM dimmers and there won't be any problems. And with RGB LEDs we can
change the hue at will. And no-one will get a shock when they touch the >cables
On Thu, 10 Nov 2022 11:38:34 +0000, Max Demian
<max_demian@bigfoot.com> wrote:
One day all lighting circuits will be low voltage DC. Then we can use
PWM dimmers and there won't be any problems. And with RGB LEDs we can
change the hue at will. And no-one will get a shock when they touch the
cables
One day maybe, but which year?
On Fri, 11 Nov 2022 10:16:56 +0000, John Williamson ><johnwilliamson@btinternet.com> wrote:
On 11/11/2022 08:43, Roderick Stewart wrote:
On Thu, 10 Nov 2022 11:38:34 +0000, Max DemianIf you have grid power available, it's not worth the bother of
<max_demian@bigfoot.com> wrote:
One day all lighting circuits will be low voltage DC. Then we can use
PWM dimmers and there won't be any problems. And with RGB LEDs we can
change the hue at will. And no-one will get a shock when they touch the >>>> cables
One day maybe, but which year?
installing a low voltage supply circuit to do it, while for off grid
uses, it happened a while ago. I live on a boat, and all my 12 volt
lights got replaced by LED equivalents about five years ago.
My wife bought a new bulb yesterday. It's LED and works on our UK 240
volt mains supply. All the pessary electronics are built in to the
bulb holder. No separate parts are needed.
Steve
On 11/11/2022 08:43, Roderick Stewart wrote:
On Thu, 10 Nov 2022 11:38:34 +0000, Max DemianIf you have grid power available, it's not worth the bother of
<max_demian@bigfoot.com> wrote:
One day all lighting circuits will be low voltage DC. Then we can use
PWM dimmers and there won't be any problems. And with RGB LEDs we can
change the hue at will. And no-one will get a shock when they touch the
cables
One day maybe, but which year?
installing a low voltage supply circuit to do it, while for off grid
uses, it happened a while ago. I live on a boat, and all my 12 volt
lights got replaced by LED equivalents about five years ago.
On 11/11/2022 10:55, steve1001908@outlook.com wrote:
On Fri, 11 Nov 2022 10:16:56 +0000, John Williamson
My wife bought a new bulb yesterday. It's LED and works on our UK 240The problem with the cheaper types of those is that they emit a lot of
volt mains supply. All the pessary electronics are built in to the
bulb holder. No separate parts are needed.
RFI, which can wipe out weak AM signals on all the common wavebands.
I use 240 volt LED worklights, but I don't listen on AM and as I live in
a steel box anyway, the RFI doesn't affect the neighbours.
On Fri, 11 Nov 2022 10:16:56 +0000, John Williamson
My wife bought a new bulb yesterday. It's LED and works on our UK 240
volt mains supply. All the pessary electronics are built in to the
bulb holder. No separate parts are needed.
On 11/11/2022 10:55, steve1001908@outlook.com wrote:
On Fri, 11 Nov 2022 10:16:56 +0000, John Williamson
My wife bought a new bulb yesterday. It's LED and works on our UK 240The problem with the cheaper types of those is that they emit a lot of
volt mains supply. All the pessary electronics are built in to the
bulb holder. No separate parts are needed.
RFI, which can wipe out weak AM signals on all the common wavebands.
I use 240 volt LED worklights, but I don't listen on AM and as I live in a steel box anyway, the RFI doesn't affect the neighbours.
The problem with the cheaper types of those is that they emit a lot of
RFI, which can wipe out weak AM signals on all the common wavebands.
I use 240 volt LED worklights, but I don't listen on AM and as I live in
a steel box anyway, the RFI doesn't affect the neighbours.
Every light in my house is LED and they don't interfere with anything.
LEDs are practically standard now, and they consume about a tenth of
the power of incandescent bulbs, so why would anyone want to buy
anything else even if they could? Radio is FM in the car or internet
at home, some people listen to DAB, and youngsters listen to stuff on
their phones, but it's been many years since I heard anyone listen to anything on AM radio. I'm not even sure if you can still buy one.
I often speak to a guy on line who is a short wave listener, and he has really bad problems with neighbours' LED lighting blotting out the
weaker stations.
Reminds of a call on Jeremy Vine's programme a few days ago.
Someone was talking about the high cost of electricity and said they
were being very careful with their heating.
But they also said they were leaving all their lights off! Shows how
many have no appreciation of the cost difference between running a LED
light taking only a few watts and electric heating.
On Thu, 10 Nov 2022 11:08:14 +0000, MB <MB@nospam.net> wrote:
Reminds of a call on Jeremy Vine's programme a few days ago.
Someone was talking about the high cost of electricity and said they
were being very careful with their heating.
But they also said they were leaving all their lights off! Shows how
many have no appreciation of the cost difference between running a LED
light taking only a few watts and electric heating.
A friend of mine believes it is better to use a battery powered radio
(with Duracell batteries) to reduce use of mains electricity.
On 14/11/2022 10:12, Scott wrote:
On Thu, 10 Nov 2022 11:08:14 +0000, MB <MB@nospam.net> wrote:That doesn't even make sense if they are rechargeable.
Reminds of a call on Jeremy Vine's programme a few days ago.
Someone was talking about the high cost of electricity and said they
were being very careful with their heating.
But they also said they were leaving all their lights off! Shows how
many have no appreciation of the cost difference between running a LED
light taking only a few watts and electric heating.
A friend of mine believes it is better to use a battery powered radio
(with Duracell batteries) to reduce use of mains electricity.
Many even ignore the embedded CO2 and other pollution in Wind turbines
and the solar panels on their roofs.
On Mon, 14 Nov 2022 11:00:48 +0000, John Williamson <johnwilliamson@btinternet.com> wrote:
On 14/11/2022 10:12, Scott wrote:
A friend of mine believes it is better to use a battery powered radioThat doesn't even make sense if they are rechargeable.
(with Duracell batteries) to reduce use of mains electricity.
It doesn't makes sense if they're disposable batteries either because
it takes energy to manufacture them.
There definitely seems to be a widespread belief that NIMBY energy is equivalent to magic. Out of sight, out of mind.
On Mon, 14 Nov 2022 11:00:48 +0000, John Williamson ><johnwilliamson@btinternet.com> wrote:
On 14/11/2022 10:12, Scott wrote:
On Thu, 10 Nov 2022 11:08:14 +0000, MB <MB@nospam.net> wrote:That doesn't even make sense if they are rechargeable.
Reminds of a call on Jeremy Vine's programme a few days ago.
Someone was talking about the high cost of electricity and said they
were being very careful with their heating.
But they also said they were leaving all their lights off! Shows how
many have no appreciation of the cost difference between running a LED >>>> light taking only a few watts and electric heating.
A friend of mine believes it is better to use a battery powered radio
(with Duracell batteries) to reduce use of mains electricity.
It doesn't makes sense if they're disposable batteries either because
it takes energy to manufacture them.
There definitely seems to be a widespread belief that NIMBY energy is >equivalent to magic. Out of sight, out of mind.
On Mon, 14 Nov 2022 12:04:29 +0000, Roderick Stewart <rjfs@escapetime.myzen.co.uk> wrote:
There definitely seems to be a widespread belief that NIMBY energy isThe argument was on cost rather than environmental grounds. Running a
equivalent to magic. Out of sight, out of mind.
radio on the mains pushes up the electricity bill :-)
On 14/11/2022 13:02, Scott wrote:
On Mon, 14 Nov 2022 12:04:29 +0000, Roderick StewartEven at the current rip off rates, a pound's worth of battery holds much
<rjfs@escapetime.myzen.co.uk> wrote:
There definitely seems to be a widespread belief that NIMBY energy isThe argument was on cost rather than environmental grounds. Running a
equivalent to magic. Out of sight, out of mind.
radio on the mains pushes up the electricity bill :-)
less than a penny's worth of grid power. (Using high power AA cells, you
get about 3 watt hours per cell.)
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