I'd like to replace all the lamps/bulb in house with LED ones (mains
bayonett fittings).

I bought a couple the other day from Tesco £7 each - and I like the
colour - and the power saving :-) Is that price a reasonable one for
8W LED lamp?

I'd just like to ask if someone can recommend a site to buy such
lamps from? My 'friends' google and ebay has zillions, but don't want
to end up with a stack of fakes. A bit cynical but it adds up to quite
a sum to change them all. Seen a few comments saying Lidl/Aldi LED
lamps are good value and quality.Thanks for any info on this.

OT: Afaik the LED lamps really are LED arrays - so I guess there is
some arsenic toxicity risk in disposal? (Minute amounts). And CFL's
have Hg. Just mention this because Sains.s lamp recycling bin is
always crammed full of CFL's - many are smashed!

On 20/01/2017 13:08, dave wrote:
I'd like to replace all the lamps/bulb in house with LED ones (mains
bayonett fittings).

I bought a couple the other day from Tesco £7 each - and I like the
colour - and the power saving :-) Is that price a reasonable one for
8W LED lamp?

Not even close. You should be able to get 15W ones for that price. eg

https://www.amazon.co.uk/Philips-Bay...dp/B01KHIMDS6/

Or 2 packs of 8W ones.

https://www.amazon.co.uk/Philips-Bay...dp/B01KHILBV6/

Plenty of other brands are OK too. Dimmable ones are more expensive.

I'd just like to ask if someone can recommend a site to buy such
lamps from? My 'friends' google and ebay has zillions, but don't want
to end up with a stack of fakes. A bit cynical but it adds up to quite
a sum to change them all. Seen a few comments saying Lidl/Aldi LED
lamps are good value and quality.Thanks for any info on this.

Amazon have plenty of genuine ones. I have bought some specialist LED
bulbs direct from China on eBay and they were OK too - at least for what
I wanted them for. I suspect exposed bare LEDs isn't ideal if you are
putting them where small fingers might touch them.

--
Regards,
Martin Brown

In article ,
dave wrote:
I bought a couple the other day from Tesco £7 each - and I like the
colour - and the power saving :-) Is that price a reasonable one for
8W LED lamp?

Not an expert, but the LEDs in my local Tesco seem to be a lot more
expensive than the local ASDA. And the ASDA ones I've bought dim with a
normal dimmer too. The Tesco ones I looked at say 'not dimmable'.

But I've not used LEDs anywhere they matter yet. Same as CFL. OK for just
providing light of a sort - but until they are as good as halogen I'll
stick to them.

--
*INDECISION is the key to FLEXIBILITY *

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

Have you also checked to see what interference they can chuck out. some are
terrible, one assumes the dreaded switch mode psu.
Brian

--
----- -
This newsgroup posting comes to you directly from...
The Sofa of Brian Gaff...

Blind user, so no pictures please!
"dave" wrote in message
...
I'd like to replace all the lamps/bulb in house with LED ones (mains
bayonett fittings).

I bought a couple the other day from Tesco £7 each - and I like the
colour - and the power saving :-) Is that price a reasonable one for
8W LED lamp?

I'd just like to ask if someone can recommend a site to buy such
lamps from? My 'friends' google and ebay has zillions, but don't want
to end up with a stack of fakes. A bit cynical but it adds up to quite
a sum to change them all. Seen a few comments saying Lidl/Aldi LED
lamps are good value and quality.Thanks for any info on this.

OT: Afaik the LED lamps really are LED arrays - so I guess there is
some arsenic toxicity risk in disposal? (Minute amounts). And CFL's
have Hg. Just mention this because Sains.s lamp recycling bin is
always crammed full of CFL's - many are smashed!

I don't like halogen. gives me a headache even though I cannot see. I get
this spreading green yellow flashing haze when I go near Halogen lighting.
Goes to prove I guess that even blind eyes can give strange effects.
Brian

--
----- -
This newsgroup posting comes to you directly from...
The Sofa of Brian Gaff...

Blind user, so no pictures please!
"Dave Plowman (News)" wrote in message
...
In article ,
dave wrote:
I bought a couple the other day from Tesco £7 each - and I like the
colour - and the power saving :-) Is that price a reasonable one for
8W LED lamp?

Not an expert, but the LEDs in my local Tesco seem to be a lot more
expensive than the local ASDA. And the ASDA ones I've bought dim with a
normal dimmer too. The Tesco ones I looked at say 'not dimmable'.

But I've not used LEDs anywhere they matter yet. Same as CFL. OK for just
providing light of a sort - but until they are as good as halogen I'll
stick to them.

--
*INDECISION is the key to FLEXIBILITY *

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

On 20/01/2017 13:08, dave wrote:
I'd like to replace all the lamps/bulb in house with LED ones (mains
bayonett fittings).

I bought a couple the other day from Tesco £7 each - and I like the
colour - and the power saving :-) Is that price a reasonable one for
8W LED lamp?

I'd just like to ask if someone can recommend a site to buy such
lamps from? My 'friends' google and ebay has zillions, but don't want
to end up with a stack of fakes. A bit cynical but it adds up to quite
a sum to change them all. Seen a few comments saying Lidl/Aldi LED
lamps are good value and quality.Thanks for any info on this.

OT: Afaik the LED lamps really are LED arrays - so I guess there is
some arsenic toxicity risk in disposal? (Minute amounts). And CFL's
have Hg. Just mention this because Sains.s lamp recycling bin is
always crammed full of CFL's - many are smashed!

I have done the same as you using HomeBargains bulbs at £2.49 each. They
have them in 2 versions, cold or warm (or similar), and pretty much
every possible fitting.

On 20/01/2017 14:44, Brian Gaff wrote:
I don't like halogen. gives me a headache even though I cannot see. I get
this spreading green yellow flashing haze when I go near Halogen lighting.
Goes to prove I guess that even blind eyes can give strange effects.
Brian


The only difference between halogen and tungsten lights is the
temperature they run at.

Are you getting so close they burn?

On Friday, 20 January 2017 14:41:19 UTC, Brian Gaff wrote:
Have you also checked to see what interference they can chuck out. some are
terrible, one assumes the dreaded switch mode psu.

Are you saying those ones brought don't conform to EU regulations ?

On Friday, 20 January 2017 14:44:08 UTC, Brian Gaff wrote:
I don't like halogen. gives me a headache even though I cannot see. I get
this spreading green yellow flashing haze when I go near Halogen lighting..
Goes to prove I guess that even blind eyes can give strange effects.
Brian

Have you found out why, as our brains tell use what we think we see rather than what is there, so something in your brain is causing this rather than your eyes I would have thought. I wonder what sot of light halagen give out that no other light source including the sun gives out.

Interesting I think you need to be tied to a chair and experimnted on by shining differnt sorts of lights at you :-)

On 20/01/2017 15:34, whisky-dave wrote:
On Friday, 20 January 2017 14:41:19 UTC, Brian Gaff wrote:

Have you also checked to see what interference they can chuck out. some are
terrible, one assumes the dreaded switch mode psu.

Are you saying those ones brought don't conform to EU regulations ?

If you are into short wave radio then some of the dodgier Chinese
imports may lack the suppression capacitors but a properly designed
switched mode PSU has no reason to be electrically noisy.

--
Regards,
Martin Brown

On 20/01/2017 13:08, dave wrote:
I'd like to replace all the lamps/bulb in house with LED ones (mains
bayonett fittings).

I bought a couple the other day from Tesco £7 each - and I like the
colour - and the power saving :-) Is that price a reasonable one for
8W LED lamp?

Way too expensive. Philips branded bulbs can easily be obtained for half
that price

Places such as Screwfix have their own brand for around £10 for 5 (9W)



Seen a few comments saying Lidl/Aldi LED
lamps are good value and quality.Thanks for any info on this.

Often Philips brand but only re-stocked twice a year and when they are
gone they are gone.


OT: Afaik the LED lamps really are LED arrays - so I guess there is
some arsenic toxicity risk in disposal? (Minute amounts). And CFL's
have Hg. Just mention this because Sains.s lamp recycling bin is
always crammed full of CFL's - many are smashed!


Don't most people dispose of these type of bulb in the household rubbish
along with their used batteries?

--
mailto: news {at} admac {dot] myzen {dot} co {dot} uk

On 20/01/2017 13:08, dave wrote:
I'd like to replace all the lamps/bulb in house with LED ones (mains
bayonett fittings).

I bought a couple the other day from Tesco £7 each - and I like the
colour - and the power saving :-) Is that price a reasonable one for
8W LED lamp?

Screwfix sell five for a tenner. That's a reasonable price IMO. I'm
quite impressed by them, though it'll take a few years to find out if
they're really good.

On Fri, 20 Jan 2017 13:08:56 +0000, dave wrote:

I'd like to replace all the lamps/bulb in house with LED ones (mains
bayonett fittings).

I bought a couple the other day from Tesco £7 each - and I like the
colour - and the power saving :-) Is that price a reasonable one for
8W LED lamp?

Morrisons have 6W, 800lm, warm white ones for £5 and, bizarrely, 15W, 1520lm
for £4 (E27 only).
Home bargains has some at reasonable prices, but not such a wide range as
last year (in my local one at least).
Screwfix do 5x9W, 800lm, warm (~2800K) or cool(er) )~4500K) B22 for £10.

Also, have a look at Ledlam. Various offers and a discount on Ebay's prices
for going direct.
--
Peter.
The gods will stay away
whilst religions hold sway

On 20/01/2017 15:41, whisky-dave wrote:
On Friday, 20 January 2017 14:44:08 UTC, Brian Gaff wrote:
I don't like halogen. gives me a headache even though I cannot see.
I get this spreading green yellow flashing haze when I go near
Halogen lighting. Goes to prove I guess that even blind eyes can
give strange effects. Brian

Have you found out why, as our brains tell use what we think we see
rather than what is there, so something in your brain is causing this
rather than your eyes I would have thought. I wonder what sot of
light halagen give out that no other light source including the sun
gives out.

There is a more intense IR component cf filament lamps as well as a
slight UV component but I can't see how it could affect someone.

But to first order all incandescent lamps are basically black body
radiation with a characteristic temperature of 2700K, 3000K or 6000K for
classic, halogen and sun respectively.

The latter varying a fair amount with time of day and cloud cover.

Interesting I think you need to be tied to a chair and experimnted on
by shining differnt sorts of lights at you :-)

That sounds cruel.

--
Regards,
Martin Brown

On 20/01/2017 17:44, PeterC wrote:
On Fri, 20 Jan 2017 13:08:56 +0000, dave wrote:

I'd like to replace all the lamps/bulb in house with LED ones (mains
bayonett fittings).

I bought a couple the other day from Tesco £7 each - and I like the
colour - and the power saving :-) Is that price a reasonable one for
8W LED lamp?

Morrisons have 6W, 800lm, warm white ones for £5 and, bizarrely, 15W, 1520lm
for £4 (E27 only).

Thanks for the tip off.

1500lm E27 are perfect for the kitchen spotlights.

--
Regards,
Martin Brown

On Fri, 20 Jan 2017 13:08:56 +0000, dave wrote:

I'd like to replace all the lamps/bulb in house with LED ones (mains
bayonett fittings).

I bought a couple the other day from Tesco £7 each - and I like the
colour - and the power saving :-) Is that price a reasonable one for
8W LED lamp?

I'd just like to ask if someone can recommend a site to buy such
lamps from? My 'friends' google and ebay has zillions, but don't want
to end up with a stack of fakes. A bit cynical but it adds up to quite
a sum to change them all. Seen a few comments saying Lidl/Aldi LED
lamps are good value and quality.Thanks for any info on this.

OT: Afaik the LED lamps really are LED arrays - so I guess there is
some arsenic toxicity risk in disposal? (Minute amounts). And CFL's
have Hg. Just mention this because Sains.s lamp recycling bin is
always crammed full of CFL's - many are smashed!

There was a recent thread about this (which I started) and which you
may find it of interest.

Beware of electromagnetic interference as these devices can interfere
with radio, particularly DAB. It seems many do not comply with the EU
Electromagnetic Compatibility (EMC) Directive and some do. I have
tried both and even those that comply (Philips) still cause
significant interference.

Philips admit the problem but say mains voltage lamps are less prone
to this than 12V.

I would avoid LED Hut. They were helpful at first but now that I want
to return all the (non-compliant) lamps they are not replying to
emails. I think my report to Trading Standards probably got their
backs up.

I would ask any supplier to confirm that the lamps are EMC compliant.

On Fri, 20 Jan 2017 14:09:36 +0000, Martin Brown
wrote:

On 20/01/2017 13:08, dave wrote:
I'd like to replace all the lamps/bulb in house with LED ones (mains
bayonett fittings).

I bought a couple the other day from Tesco £7 each - and I like the
colour - and the power saving :-) Is that price a reasonable one for
8W LED lamp?

Not even close. You should be able to get 15W ones for that price. eg

https://www.amazon.co.uk/Philips-Bay...dp/B01KHIMDS6/

Or 2 packs of 8W ones.

https://www.amazon.co.uk/Philips-Bay...dp/B01KHILBV6/

Plenty of other brands are OK too. Dimmable ones are more expensive.

I'd just like to ask if someone can recommend a site to buy such
lamps from? My 'friends' google and ebay has zillions, but don't want
to end up with a stack of fakes. A bit cynical but it adds up to quite
a sum to change them all. Seen a few comments saying Lidl/Aldi LED
lamps are good value and quality.Thanks for any info on this.

Amazon have plenty of genuine ones. I have bought some specialist LED
bulbs direct from China on eBay and they were OK too - at least for what
I wanted them for. I suspect exposed bare LEDs isn't ideal if you are
putting them where small fingers might touch them.

When you say 'genuine' did you receive assurance that they are EMC
complaint?

On Fri, 20 Jan 2017 15:26:48 +0000, dennis@home
wrote:

On 20/01/2017 14:44, Brian Gaff wrote:
I don't like halogen. gives me a headache even though I cannot see. I get
this spreading green yellow flashing haze when I go near Halogen lighting.
Goes to prove I guess that even blind eyes can give strange effects.
Brian


The only difference between halogen and tungsten lights is the
temperature they run at.

Surely the temperature directly influences the frequency of the light
output?

On Fri, 20 Jan 2017 07:34:09 -0800 (PST), whisky-dave
wrote:

On Friday, 20 January 2017 14:41:19 UTC, Brian Gaff wrote:
Have you also checked to see what interference they can chuck out. some are
terrible, one assumes the dreaded switch mode psu.

Are you saying those ones brought don't conform to EU regulations ?

The ones I bought don't and the seller said they do not require to. I
am now in dispute over refund.

On Fri, 20 Jan 2017 15:42:42 +0000, Martin Brown
wrote:

On 20/01/2017 15:34, whisky-dave wrote:
On Friday, 20 January 2017 14:41:19 UTC, Brian Gaff wrote:

Have you also checked to see what interference they can chuck out. some are
terrible, one assumes the dreaded switch mode psu.

Are you saying those ones brought don't conform to EU regulations ?

If you are into short wave radio then some of the dodgier Chinese
imports may lack the suppression capacitors but a properly designed
switched mode PSU has no reason to be electrically noisy.

As I said earlier Philips EMC complaint bulbs (12V) significantly
intefere with my DAB radio. There may be 'no reason' but never let
the facts get in the way of a good story.

On Fri, 20 Jan 2017 16:00:03 +0000, alan_m
wrote:

On 20/01/2017 13:08, dave wrote:
I'd like to replace all the lamps/bulb in house with LED ones (mains
bayonett fittings).

I bought a couple the other day from Tesco £7 each - and I like the
colour - and the power saving :-) Is that price a reasonable one for
8W LED lamp?

Way too expensive. Philips branded bulbs can easily be obtained for half
that price

Places such as Screwfix have their own brand for around £10 for 5 (9W)



Seen a few comments saying Lidl/Aldi LED
lamps are good value and quality.Thanks for any info on this.

Often Philips brand but only re-stocked twice a year and when they are
gone they are gone.


OT: Afaik the LED lamps really are LED arrays - so I guess there is
some arsenic toxicity risk in disposal? (Minute amounts). And CFL's
have Hg. Just mention this because Sains.s lamp recycling bin is
always crammed full of CFL's - many are smashed!


Don't most people dispose of these type of bulb in the household rubbish
along with their used batteries?

And your point is, caller?

On Fri, 20 Jan 2017 19:35:04 +0000, Scott
wrote:

[snip]

There was a recent thread about this (which I started) and which you
may find it of interest.

PS I should have said it is to be found in uk.tech.digital-tv.

On 20/01/2017 19:38, Scott wrote:
On Fri, 20 Jan 2017 15:26:48 +0000, dennis@home
wrote:

On 20/01/2017 14:44, Brian Gaff wrote:
I don't like halogen. gives me a headache even though I cannot see. I get
this spreading green yellow flashing haze when I go near Halogen lighting.
Goes to prove I guess that even blind eyes can give strange effects.
Brian


The only difference between halogen and tungsten lights is the
temperature they run at.

Surely the temperature directly influences the frequency of the light
output?


It moves the peak of the curve slightly to the blue.
It doesn't make them emit any visible light that wasn't already visible.

On Fri, 20 Jan 2017 19:45:17 +0000, dennis@home
wrote:

On 20/01/2017 19:38, Scott wrote:
On Fri, 20 Jan 2017 15:26:48 +0000, dennis@home
wrote:

On 20/01/2017 14:44, Brian Gaff wrote:
I don't like halogen. gives me a headache even though I cannot see. I get
this spreading green yellow flashing haze when I go near Halogen lighting.
Goes to prove I guess that even blind eyes can give strange effects.
Brian


The only difference between halogen and tungsten lights is the
temperature they run at.

Surely the temperature directly influences the frequency of the light
output?


It moves the peak of the curve slightly to the blue.
It doesn't make them emit any visible light that wasn't already visible.

'Visible' is a not entirely relevant concept for someone who is blind.
If Brian is experiencing headaches with these particular lights could
it not be related to the colour temperature.

Scott wrote:
Amazon have plenty of genuine ones. I have bought some specialist LED
bulbs direct from China on eBay and they were OK too - at least for what
I wanted them for. I suspect exposed bare LEDs isn't ideal if you are
putting them where small fingers might touch them.

When you say 'genuine' did you receive assurance that they are EMC
complaint?

Well, one might complain about them I suppose but if they are
compliant you won't have a leg to stand on.

--
Chris Green
·

Scott wrote:
On Fri, 20 Jan 2017 15:42:42 +0000, Martin Brown
wrote:

On 20/01/2017 15:34, whisky-dave wrote:
On Friday, 20 January 2017 14:41:19 UTC, Brian Gaff wrote:

Have you also checked to see what interference they can chuck out. some are
terrible, one assumes the dreaded switch mode psu.

Are you saying those ones brought don't conform to EU regulations ?

If you are into short wave radio then some of the dodgier Chinese
imports may lack the suppression capacitors but a properly designed
switched mode PSU has no reason to be electrically noisy.

As I said earlier Philips EMC complaint bulbs (12V) significantly

Again! :-)

intefere with my DAB radio. There may be 'no reason' but never let
the facts get in the way of a good story.

--
Chris Green
·

On Fri, 20 Jan 2017 20:11:03 +0000, Chris Green wrote:

Scott wrote:
Amazon have plenty of genuine ones. I have bought some specialist LED
bulbs direct from China on eBay and they were OK too - at least for what
I wanted them for. I suspect exposed bare LEDs isn't ideal if you are
putting them where small fingers might touch them.

When you say 'genuine' did you receive assurance that they are EMC
complaint?

Well, one might complain about them I suppose but if they are
compliant you won't have a leg to stand on.

Very observant. I cannot even blame it on spellchecker in Usenet -
the human version of spellchecker I suppose.

The reason I ask is that I bought some that carried CE marking (which
I assumed to be genuine) and was told by the supplier they are not EMC
COMPLIANT.

On Fri, 20 Jan 2017 20:11:36 +0000, Chris Green wrote:

Scott wrote:
On Fri, 20 Jan 2017 15:42:42 +0000, Martin Brown
wrote:

On 20/01/2017 15:34, whisky-dave wrote:
On Friday, 20 January 2017 14:41:19 UTC, Brian Gaff wrote:

Have you also checked to see what interference they can chuck out. some are
terrible, one assumes the dreaded switch mode psu.

Are you saying those ones brought don't conform to EU regulations ?

If you are into short wave radio then some of the dodgier Chinese
imports may lack the suppression capacitors but a properly designed
switched mode PSU has no reason to be electrically noisy.

As I said earlier Philips EMC complaint bulbs (12V) significantly

Again! :-)

I was quoting myself this time :-)

On 20/01/2017 19:48, Scott wrote:
On Fri, 20 Jan 2017 19:45:17 +0000, dennis@home
wrote:

On 20/01/2017 19:38, Scott wrote:
On Fri, 20 Jan 2017 15:26:48 +0000, dennis@home
wrote:

On 20/01/2017 14:44, Brian Gaff wrote:
I don't like halogen. gives me a headache even though I cannot see. I get
this spreading green yellow flashing haze when I go near Halogen lighting.
Goes to prove I guess that even blind eyes can give strange effects.
Brian


The only difference between halogen and tungsten lights is the
temperature they run at.

Surely the temperature directly influences the frequency of the light
output?


It moves the peak of the curve slightly to the blue.
It doesn't make them emit any visible light that wasn't already visible.

'Visible' is a not entirely relevant concept for someone who is blind.
If Brian is experiencing headaches with these particular lights could
it not be related to the colour temperature.


I can't see why it should be.

The outlier is the conventional filament bulb. Halogen light is slightly
*more* like natural sunlight. You could get blue coated filament bulbs
to fakte 6000K daylight for photography in the old days.

Before modern auto white balance digital cameras film was very tetchy
about colour temperature with fluorescents being a green cast disaster.

--
Regards,
Martin Brown

In article ,
Martin Brown wrote:
Before modern auto white balance digital cameras film was very tetchy
about colour temperature with fluorescents being a green cast disaster.

There are fluorescent tubes designed specifically for photography, etc.

In exactly the same way as there were those 'blue' coated tungsten lamps
designed for photography.

In other words, use the wrong lighting and you'll likely get poor results.

--
*HOW IS IT POSSIBLE TO HAVE A CIVIL WAR?

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

On 21/01/2017 11:11, Huge wrote:
On 2017-01-20, Scott wrote:
On Fri, 20 Jan 2017 15:26:48 +0000, dennis@home
wrote:

On 20/01/2017 14:44, Brian Gaff wrote:
I don't like halogen. gives me a headache even though I cannot see. I get
this spreading green yellow flashing haze when I go near Halogen lighting.
Goes to prove I guess that even blind eyes can give strange effects.
Brian


The only difference between halogen and tungsten lights is the
temperature they run at.

Surely the temperature directly influences the frequency of the light
output?

It's dennis. He's wrong. He's always wrong. About everything.


It does not affect the frequency output in the visible bands, it just
moves the peak distribution towards the blue.
So you are wrong again huge.
You should learn the difference between a continuous spectrum like
tungsten and halogen lights and others with a line spectrum.
Then you won't look like a huge ****.

On 20/01/2017 14:41, Brian Gaff wrote:
Have you also checked to see what interference they can chuck out. some are
terrible, one assumes the dreaded switch mode psu.
Brian


Most of the more recent ones seem to be capacitive dropper...

On 21/01/2017 17:56, Lee wrote:
On 20/01/2017 14:41, Brian Gaff wrote:
Have you also checked to see what interference they can chuck out.
some are
terrible, one assumes the dreaded switch mode psu.
Brian


Most of the more recent ones seem to be capacitive dropper...

^^^^ "some" not "most"

On Sat, 21 Jan 2017 18:03:03 +0000, Lee
wrote:

On 21/01/2017 17:56, Lee wrote:
On 20/01/2017 14:41, Brian Gaff wrote:
Have you also checked to see what interference they can chuck out.
some are
terrible, one assumes the dreaded switch mode psu.
Brian


Most of the more recent ones seem to be capacitive dropper...

^^^^ "some" not "most"

As a matter of interest, why to the 12 Volt ones seem to be more
problematic than the mains ones?

On 21/01/2017 18:16, Scott wrote:

As a matter of interest, why to the 12 Volt ones seem to be more
problematic than the mains ones?


Current to be supplied?

10W from 220V, current to be supplied 0.045 Amps

10W from 12V, current to be supplied 0.833 Amps

The low supply voltage power supply is switching high currents.
The mains supply is switching low currents.


--
mailto: news {at} admac {dot] myzen {do1t} co {dot} uk

On Sat, 21 Jan 2017 18:33:42 +0000, alan_m
wrote:

On 21/01/2017 18:16, Scott wrote:

As a matter of interest, why to the 12 Volt ones seem to be more
problematic than the mains ones?


Current to be supplied?

10W from 220V, current to be supplied 0.045 Amps

10W from 12V, current to be supplied 0.833 Amps

The low supply voltage power supply is switching high currents.
The mains supply is switching low currents.

That makes sense. I had not thought of that.

I take it this 'switching' is what they used to call 'rectifying' when
I was at school? Would it be possible to fit a rectifier to the
output of the transformer then use DC bulbs? Would this solve the
problem?

Also, I see that the bulbs are AC or DC. Would be be possible to fit
a rectifier and use the same bulbs or would the circuitry continue to
cause problems?

Do you envisage technical developments resolving this or has the
balance shifted in favour of 230V so far as LED is concerned?

On Sat, 21 Jan 2017 19:29:42 +0000, Scott
wrote:

On Sat, 21 Jan 2017 18:33:42 +0000, alan_m
wrote:

On 21/01/2017 18:16, Scott wrote:

As a matter of interest, why to the 12 Volt ones seem to be more
problematic than the mains ones?


Current to be supplied?

10W from 220V, current to be supplied 0.045 Amps

10W from 12V, current to be supplied 0.833 Amps

The low supply voltage power supply is switching high currents.
The mains supply is switching low currents.

That makes sense. I had not thought of that.

I take it this 'switching' is what they used to call 'rectifying' when
I was at school? Would it be possible to fit a rectifier to the
output of the transformer then use DC bulbs? Would this solve the
problem?

Also, I see that the bulbs are AC or DC. Would be be possible to fit
a rectifier and use the same bulbs or would the circuitry continue to
cause problems?

Do you envisage technical developments resolving this or has the
balance shifted in favour of 230V so far as LED is concerned?

As a follow-up I see there are some EMI free bulbs advertised. I
won't post links as some might then question my motives. They seem to
be lower-powered and DC.

On 21/01/2017 20:44, Scott wrote:


As a follow-up I see there are some EMI free bulbs advertised. I
won't post links as some might then question my motives. They seem to
be lower-powered and DC.


Unless you are running them from a 12V DC source, say, on a boat,
caravan etc. you may just be moving the problem to the external power
supply you have to fit to drive the DC bulbs
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On Sat, 21 Jan 2017 19:29:42 +0000, Scott wrote:

On Sat, 21 Jan 2017 18:33:42 +0000, alan_m
wrote:

On 21/01/2017 18:16, Scott wrote:

As a matter of interest, why to the 12 Volt ones seem to be more
problematic than the mains ones?


Current to be supplied?

10W from 220V, current to be supplied 0.045 Amps

10W from 12V, current to be supplied 0.833 Amps

The low supply voltage power supply is switching high currents.
The mains supply is switching low currents.

That makes sense. I had not thought of that.

I take it this 'switching' is what they used to call 'rectifying' when I
was at school?

No.

https://en.wikipedia.org/wiki/Switch...e_power_supply




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"Scott" wrote in message
news
On Fri, 20 Jan 2017 20:11:36 +0000, Chris Green wrote:

Scott wrote:
On Fri, 20 Jan 2017 15:42:42 +0000, Martin Brown
wrote:

On 20/01/2017 15:34, whisky-dave wrote:
On Friday, 20 January 2017 14:41:19 UTC, Brian Gaff wrote:

Have you also checked to see what interference they can chuck out.
some are
terrible, one assumes the dreaded switch mode psu.

Are you saying those ones brought don't conform to EU regulations ?

If you are into short wave radio then some of the dodgier Chinese
imports may lack the suppression capacitors but a properly designed
switched mode PSU has no reason to be electrically noisy.

As I said earlier Philips EMC complaint bulbs (12V) significantly

Again! :-)

I was quoting myself this time :-)

I like the apt way you call them complaint bulbs.
--
Dave W