Lighting question
 

I'm going to fit two lights in the same room. The problem is they don't
have line and neutral marked. If I get one the wrong way round will they
be in antiphase, and will this make the room get darker when I turn the
light on?

This is UK-DIY isn't it? I posted this message earlier but it didn't appear.

Bill

Lighting question
 

"Bill Wright" wrote in message
...
I'm going to fit two lights in the same room. The problem is
they don't have line and neutral marked. If I get one the wrong
way round will they be in antiphase, and will this make the
room get darker when I turn the light on?

This is UK-DIY isn't it? I posted this message earlier but it
didn't appear.

Bill



There is no polarity in normal lighting, other than it is the
live line that is switched, and there is no such thing as phasing
with lights as the element (incandescent) or phosphor (PLC) will
glow much longer than the mains frequency and as such will appear
continuous.

What may be confusing you is that modern wiring is a ring around
the fittings with a single (twin+earth) wire going to the switch.
There will be three reds (live) connected together - that is two
reds from the ring and one to the switch, two blacks (neutral)
from the ring connected together, and a single black return from
the switch (switched live) which may or may not be sleeved with a
different colour. The light connects between the single switched
live (now black or sleeved) and the two black neutrals that are
connected together. If any bare earths are present (there should
be three) they should be sleeved green/yellow and connected
together in the separate earth point.

Most modern ceiling roses will have three connectors fixed in
them: the three-hole connector at one end is for the lives (red,)
the three-hole connector in the middle is for neutral, and the
two-hole connector at the other end is for the switched live.


--
Woody

harrogate three at ntlworld dot com

Lighting question
 

"Woody" wrote in message
...
"Bill Wright" wrote in message
...
I'm going to fit two lights in the same room. The problem is
they don't have line and neutral marked. If I get one the
wrong way round will they be in antiphase, and will this make
the room get darker when I turn the light on?

This is UK-DIY isn't it? I posted this message earlier but it
didn't appear.

Bill



There is no polarity in normal lighting, other than it is the
live line that is switched, and there is no such thing as
phasing with lights as the element (incandescent) or phosphor
(PLC) will glow much longer than the mains frequency and as
such will appear continuous.

What may be confusing you is that modern wiring is a ring
around the fittings with a single (twin+earth) wire going to
the switch. There will be three reds (live) connected
together - that is two reds from the ring and one to the
switch, two blacks (neutral) from the ring connected together,
and a single black return from the switch (switched live) which
may or may not be sleeved with a different colour. The light
connects between the single switched live (now black or
sleeved) and the two black neutrals that are connected
together. If any bare earths are present (there should be
three) they should be sleeved green/yellow and connected
together in the separate earth point.

Most modern ceiling roses will have three connectors fixed in
them: the three-hole connector at one end is for the lives
(red,) the three-hole connector in the middle is for neutral,
and the two-hole connector at the other end is for the switched
live.


--
Woody

harrogate three at ntlworld dot com





Begger. I fell into that trap, didn't I?


--
Woody

harrogate three at ntlworld dot com

Lighting question
 

In article , Woody
scribeth thus
"Woody" wrote in message
...
"Bill Wright" wrote in message
...
I'm going to fit two lights in the same room. The problem is
they don't have line and neutral marked. If I get one the
wrong way round will they be in antiphase, and will this make
the room get darker when I turn the light on?

This is UK-DIY isn't it? I posted this message earlier but it
didn't appear.

Bill



There is no polarity in normal lighting, other than it is the
live line that is switched, and there is no such thing as
phasing with lights as the element (incandescent) or phosphor
(PLC) will glow much longer than the mains frequency and as
such will appear continuous.

What may be confusing you is that modern wiring is a ring
around the fittings with a single (twin+earth) wire going to
the switch. There will be three reds (live) connected
together - that is two reds from the ring and one to the
switch, two blacks (neutral) from the ring connected together,
and a single black return from the switch (switched live) which
may or may not be sleeved with a different colour. The light
connects between the single switched live (now black or
sleeved) and the two black neutrals that are connected
together. If any bare earths are present (there should be
three) they should be sleeved green/yellow and connected
together in the separate earth point.

Most modern ceiling roses will have three connectors fixed in
them: the three-hole connector at one end is for the lives
(red,) the three-hole connector in the middle is for neutral,
and the two-hole connector at the other end is for the switched
live.


--
Woody

harrogate three at ntlworld dot com





Begger. I fell into that trap, didn't I?


Yus!, Hook phase and neutral;)..
--
Tony Sayer

Lighting question
 

"Bill Wright" wrote in message ...
I'm going to fit two lights in the same room. The problem is they don't have line and neutral marked. If I get one the wrong way
round will they be in antiphase, and will this make the room get darker when I turn the light on?

This is UK-DIY isn't it? I posted this message earlier but it didn't appear.

Bill


Tesco were doing an offer of 11W CFL candle bulbs for 10p, so I got a basket full
for the hall chandeliers here at Graham Mansions.
I kid you not, when you turn them on the room gets darker!

It takes three full minutes for the brightness to approach that of those
that are already warmed up.
There's no good reason to keep Hg out of our children's brains if they
are going to die from falling down the stairs due light-bulbs deficient of same...

....And another thing, why do people say things like three full minutes, I mean if they
were half minutes that would have added up to 1½ minutes and I would have said so.



--
Graham.

%Profound_observation%

Lighting question
 

In message , Graham.
wrote

There's no good reason to keep Hg out of our children's brains if they
are going to die from falling down the stairs due light-bulbs deficient
of same...

Millions of people in the past have died falling down stairs because
they only had 1 candle power technology!
--
Alan
news2009 {at} admac {dot} myzen {dot} co {dot} uk

Lighting question
 

In message , Bill Wright
wrote
I'm going to fit two lights in the same room. The problem is they don't
have line and neutral marked. If I get one the wrong way round will
they be in antiphase, and will this make the room get darker when I
turn the light on?

Many people don't realise that when they fit three bulbs two can be in
phase and one can be out of phase. Simply by swapping the phase of the
one bulb they could get 66% more light.

--
Alan
news2009 {at} admac {dot} myzen {dot} co {dot} uk

Lighting question
 

In article ,
Bill Wright wrote:
I'm going to fit two lights in the same room. The problem is they don't
have line and neutral marked. If I get one the wrong way round will they
be in antiphase, and will this make the room get darker when I turn the
light on?

Best to fit Aldi CFLs. You won't then notice any difference when they're
on or off. Tesco ones automatically phase themselves in after about 5
minutes or so. This is why they appear to get brighter.

This is UK-DIY isn't it? I posted this message earlier but it didn't
appear.

They're very picky who they let post. Jamie got his arse kicked after his
first post.

--
*I believe five out of four people have trouble with fractions. *

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

Lighting question
 

"Graham." wrote in message
...
"Bill Wright" wrote in message
...
I'm going to fit two lights in the same room. The problem is they don't
have line and neutral marked. If I get one the wrong way round will they
be in antiphase, and will this make the room get darker when I turn the
light on?

This is UK-DIY isn't it? I posted this message earlier but it didn't
appear.
Bill

Tesco were doing an offer of 11W CFL candle bulbs for 10p, so I got a
basket full
for the hall chandeliers here at Graham Mansions.
I kid you not, when you turn them on the room gets darker!

It takes three full minutes for the brightness to approach that of those
that are already warmed up.
There's no good reason to keep Hg out of our children's brains if they
are going to die from falling down the stairs due light-bulbs deficient of
same...

...And another thing, why do people say things like three full minutes, I
mean if they
were half minutes that would have added up to 1½ minutes and I would have
said so.
Graham.


You'll be binning them soon when LED bulbs get cheaper,
CFL bulbs are a dead technology.

LED Such as:
http://www.dealextreme.com/details.dx/sku.37161

Steve Terry
--
"I would like to plead for my right to investigate natural phenomena
without having guns pointed at me.
I also ask for the right to be wrong without being hanged for it."
- Wilhelm Reich, November 1947

Lighting question
 

"Dave Plowman (News)" wrote in message
...

They're very picky who they let post. Jamie got his arse kicked after his
first post.

In your dreams, Plowfool.
(he's very bitter because I made a fool out of him).

jamie.
--

Lighting question
 

"Alan" wrote in message
...

Many people don't realise that when they fit three bulbs two can be in phase
and one can be out of phase. Simply by swapping the phase of the one bulb they
could get 66% more light.

ha ha etc...
On a vaguely-related note though, in the utility room at my parents' house the
mains hum from the fluorescent light used to cancel out the mains hum from the
central heating pump, to the point where the room became virtually silent when
both were operating.

jamie.
--

Lighting question
 

On Oct 8, 8:24*pm, "Woody" wrote:
"Woody" wrote in message

...





"Bill Wright" wrote in message
...
I'm going to fit two lights in the same room. The problem is
they don't have line and neutral marked. If I get one the
wrong way round will they be in antiphase, and will this make
the room get darker when I turn the light on?

This is UK-DIY isn't it? I posted this message earlier but it
didn't appear.

Bill

There is no polarity in normal lighting, other than it is the
live line that is switched, and there is no such thing as
phasing with lights as the element (incandescent) or phosphor
(PLC) will glow much longer than the mains frequency and as
such will appear continuous.

What may be confusing you is that modern wiring is a ring
around the fittings with a single (twin+earth) wire going to
the switch. There will be three reds (live) connected
together - that is two reds from the ring and one to the
switch, two blacks (neutral) from the ring connected together,
and a single black return from the switch (switched live) which
may or may not be sleeved with a different colour. The light
connects between the single switched live (now black or
sleeved) and the two black neutrals that are connected
together. If any bare earths are present (there should be
three) they should be sleeved green/yellow and connected
together in the separate earth point.

Most modern ceiling roses will have three connectors fixed in
them: the three-hole connector at one end is for the lives
(red,) the three-hole connector in the middle is for neutral,
and the two-hole connector at the other end is for the switched
live.

--
Woody

harrogate three at ntlworld dot com

Begger. I fell into that trap, didn't I?

Oh I'm sorry Woody! Good fun though!

Bill

Lighting question
 

" wrote in
message
...
On Oct 8, 8:24 pm, "Woody" wrote:
"Woody" wrote in message

...





"Bill Wright" wrote in message
...
I'm going to fit two lights in the same room. The problem is
they don't have line and neutral marked. If I get one the
wrong way round will they be in antiphase, and will this
make
the room get darker when I turn the light on?

This is UK-DIY isn't it? I posted this message earlier but
it
didn't appear.

Bill

There is no polarity in normal lighting, other than it is the
live line that is switched, and there is no such thing as
phasing with lights as the element (incandescent) or phosphor
(PLC) will glow much longer than the mains frequency and as
such will appear continuous.

What may be confusing you is that modern wiring is a ring
around the fittings with a single (twin+earth) wire going to
the switch. There will be three reds (live) connected
together - that is two reds from the ring and one to the
switch, two blacks (neutral) from the ring connected
together,
and a single black return from the switch (switched live)
which
may or may not be sleeved with a different colour. The light
connects between the single switched live (now black or
sleeved) and the two black neutrals that are connected
together. If any bare earths are present (there should be
three) they should be sleeved green/yellow and connected
together in the separate earth point.

Most modern ceiling roses will have three connectors fixed in
them: the three-hole connector at one end is for the lives
(red,) the three-hole connector in the middle is for neutral,
and the two-hole connector at the other end is for the
switched
live.

--
Woody

harrogate three at ntlworld dot com

Begger. I fell into that trap, didn't I?

Oh I'm sorry Woody! Good fun though!

Bill



Don't worry Wrighty, I'll get even ................... one day!


--
Woody

harrogate three at ntlworld dot com

Lighting question
 

"Graham." wrote in message
...


"Bill Wright" wrote in message
...
I'm going to fit two lights in the same room. The problem is they don't
have line and neutral marked. If I get one the wrong way round will they
be in antiphase, and will this make the room get darker when I turn the
light on?

This is UK-DIY isn't it? I posted this message earlier but it didn't
appear.

Bill


Tesco were doing an offer of 11W CFL candle bulbs for 10p, so I got a
basket full
for the hall chandeliers here at Graham Mansions.
I kid you not, when you turn them on the room gets darker!

It takes three full minutes for the brightness to approach that of those
that are already warmed up.
There's no good reason to keep Hg out of our children's brains if they
are going to die from falling down the stairs due light-bulbs deficient of
same...

I bought some Tesco CFL replacements for the 40 watt 50mm spot bulbs in the
kids playroom and they were the same, truly dire warm up and too long for
the fittings.
However, the curly CFLs in 8,12 and 20 watt versions made for Tesco by GE
Lighting are excellent. Nice colour, quick start up and good light output.
CFLs seem to be a black art - certainly while they're warming up in some
cases!

Lighting question
 

Well I guess as there are now so many repeats on the tv, its only wright
that we get them here as well.
Another question, if the house has power line internet adaptors, do the
lights actually flicker as you download?

Brian

--
Brian Gaff -
Note:- In order to reduce spam, any email without 'Brian Gaff'
in the display name may be lost.
Blind user, so no pictures please!
"Bill Wright" wrote in message
...
I'm going to fit two lights in the same room. The problem is they don't
have line and neutral marked. If I get one the wrong way round will they
be in antiphase, and will this make the room get darker when I turn the
light on?

This is UK-DIY isn't it? I posted this message earlier but it didn't
appear.

Bill

Lighting question
 

In article ,
Steve Terry wrote:
You'll be binning them soon when LED bulbs get cheaper,
CFL bulbs are a dead technology.

LED Such as:
http://www.dealextreme.com/details.dx/sku.37161

I wouldn't be too certain if you wish the same sort of light quality you
get from tungsten halogen. This is possible with fluorescents, but
attempting it with LED results in reduced efficiency and life.

--
*Learn from your parents' mistakes - use birth control

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

Lighting question
 

In article ,
j r powell wrote:

"Dave Plowman (News)" wrote in message
...

They're very picky who they let post. Jamie got his arse kicked after
his first post.

In your dreams, Plowfool.
(he's very bitter because I made a fool out of him).

Still in denial, pet?

--
*If a mute swears, does his mother wash his hands with soap?

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

Lighting question
 

Martin wrote:

According to a Dutch CA test report Ikea's CFL are both best and cheapest.

Got them in our house, they're certainly the most attractive (read 'female
friendly' ! )

--
Mark
Please replace invalid and invalid with gmx and net to reply.

www.paras.org.uk

Lighting question
 

In message , Steve Terry
wrote

You'll be binning them soon when LED bulbs get cheaper,
CFL bulbs are a dead technology.

LED Such as:
http://www.dealextreme.com/details.dx/sku.37161

In my experience these higher power LEDs only have a working life of a
few thousand hours unless you can keep the semiconductor junction
temperature cool. The average light fitting will not allow them to run
cool.

--
Alan
news2009 {at} admac {dot} myzen {dot} co {dot} uk

Lighting question
 

"Graham." wrote in message
...
"Bill Wright" wrote in message
...
I'm going to fit two lights in the same room. The problem is they don't
have line and neutral marked. If I get one the wrong way round will they
be in antiphase, and will this make the room get darker when I turn the
light on?

This is UK-DIY isn't it? I posted this message earlier but it didn't
appear.

Tesco were doing an offer of 11W CFL candle bulbs for 10p, so I got a
basket full
for the hall chandeliers here at Graham Mansions.
I kid you not, when you turn them on the room gets darker!

It takes three full minutes for the brightness to approach that of those
that are already warmed up.
There's no good reason to keep Hg out of our children's brains if they
are going to die from falling down the stairs due light-bulbs deficient of
same...

You've got it the wrong way round. It's CFLs that contain mercury (and if
one blows up you are supposed to abandon the house and call in a
decontamination team).

I don't think there's much harmful in ordinary light bulbs. (Some people eat
them.)

--
Max Demian

Lighting question
 

In message , Graham.
writes


"Bill Wright" wrote in message
...
I'm going to fit two lights in the same room. The problem is they
don't have line and neutral marked. If I get one the wrong way
round will they be in antiphase, and will this make the room get
darker when I turn the light on?

This is UK-DIY isn't it? I posted this message earlier but it didn't appear.

Bill


Tesco were doing an offer of 11W CFL candle bulbs for 10p, so I got a
basket full
for the hall chandeliers here at Graham Mansions.
I kid you not, when you turn them on the room gets darker!

Some time ago, works colleague of mine came up with the theory that
lights actually worked by sucking in the darkness. [I've recently seen a
similar explanation on the internet, so it must be true.]

It is a well-known fact that CFL lamps don't work as well as
incandescent. As the Americans might say "CFL sucks" - but obviously not
hard enough.
--
Ian

Lighting question
 

"j r powell" wrote in message ...

"Alan" wrote in message ...

Many people don't realise that when they fit three bulbs two can be in phase and one can be out of phase. Simply by swapping the
phase of the one bulb they could get 66% more light.

ha ha etc...
On a vaguely-related note though, in the utility room at my parents' house the mains hum from the fluorescent light used to cancel
out the mains hum from the central heating pump, to the point where the room became virtually silent when both were operating.

Does it work for wifes??

--
Graham.

%Profound_observation%

Lighting question
 

On 08/10/2010 23:00, Alan wrote:
In message , Bill Wright
wrote
I'm going to fit two lights in the same room. The problem is they
don't have line and neutral marked. If I get one the wrong way round
will they be in antiphase, and will this make the room get darker when
I turn the light on?

Many people don't realise that when they fit three bulbs two can be in
phase and one can be out of phase. Simply by swapping the phase of the
one bulb they could get 66% more light.


Be a good wheeze to send that one around the greenwash facts
distribution network and then publicly ridicule the first council that
places a large order for step ladders and ladder safety courses.

Could provide employment though ...

--
Adrian C

Lighting question
 

On a vaguely-related note though, in the utility room at my parents'
house the mains hum from the fluorescent light used to cancel
out the mains hum from the central heating pump, to the point where the
room became virtually silent when both were operating.

Does it work for wifes??


It might, but you need both turn-on in the same room

O.G.

Lighting question
 

On Sat, 09 Oct 2010 12:02:53 +0200, Martin wrote:
On Sat, 09 Oct 2010 10:17:37 +0100, Mark Carver
wrote:

Martin wrote:

According to a Dutch CA test report Ikea's CFL are both best and cheapest.

Got them in our house, they're certainly the most attractive (read 'female
friendly' ! )

The sort that take minutes to warm up seem to be obsolete junk that somebody is
dumping in UK.

Considering the relative costs of CFLs in Britain (from 10p a pop) with
the cost in France / Spain etc (€3+, no discounts) if I was going to
sell a load off, I'd do it elsewhere for €2, rather than try and dump
them in a country where the price is already very low.

--
http://www.thisreallyismyhost.99k.or...0943457284.php

Lighting question
 

Max Demian wrote:

You've got it the wrong way round. It's CFLs that contain mercury (and if
one blows up you are supposed to abandon the house and call in a
decontamination team).

Remind me how long fluorescent tubes have been in use domestically in the UK ?


--
Mark
Please replace invalid and invalid with gmx and net to reply.

www.paras.org.uk

Lighting question
 

Ah, I've been meaning to ask a question about these sell your surplus
electric back to the grid ideas. I wonder if you put a patch lead between
two properties and put up some fake solar panels and wind turbines if both
houses could sell each others back to different bill constructors and save
oodles of dosh?

Brian

--
Brian Gaff -
Note:- In order to reduce spam, any email without 'Brian Gaff'
in the display name may be lost.
Blind user, so no pictures please!
"Martin" wrote in message
...
On Sat, 9 Oct 2010 09:35:11 +0100, "Brian Gaff"
wrote:

Well I guess as there are now so many repeats on the tv, its only wright
that we get them here as well.
Another question, if the house has power line internet adaptors, do the
lights actually flicker as you download?

Only when SWMBO mother in the attic bedroom doesn't pedal fast enough
--

Martin

Lighting question
 

On Sat, 9 Oct 2010 14:10:25 +0100, "Brian Gaff"
wrote:

Ah, I've been meaning to ask a question about these sell your surplus
electric back to the grid ideas. I wonder if you put a patch lead between
two properties and put up some fake solar panels and wind turbines if both
houses could sell each others back to different bill constructors and save
oodles of dosh?

I suspect that there might be a meter measuring not just the current but
the direction of the current to and from a house.

--
Peter Duncanson
(in uk.tech.digital-tv)

Lighting question
 

Alan wrote:

In my experience these higher power LEDs only have a working life of a
few thousand hours unless you can keep the semiconductor junction
temperature cool. The average light fitting will not allow them to run
cool.

But a few thousand hours is a long time, compared with the 1000 hours
of a typical tungsten lamp, and the oft-claimed but rarely achieved
8000 hours of a CFL.

There are 8760 hours in a year, so you're probably looking at - what,
eight years? - for a bulb lit for two hours per day in the summer and
six hours per day in the winter.

I guess it all depends on the initial purchase cost as to whether
that's an acceptable lifespan.

SteveT

Lighting question
 

In message , Mark Carver
writes
Max Demian wrote:

You've got it the wrong way round. It's CFLs that contain mercury
(and if one blows up you are supposed to abandon the house and call
in a decontamination team).

Remind me how long fluorescent tubes have been in use domestically in the UK ?

I first started using CFLs four or five (?) years ago. Most of the
lights in the house (those which can be CFLs) are now CFLs. I've never
had to replace one.
--
Ian

Lighting question
 

In article ,
Steve Thackery wrote:
Alan wrote:

In my experience these higher power LEDs only have a working life of a
few thousand hours unless you can keep the semiconductor junction
temperature cool. The average light fitting will not allow them to run
cool.

But a few thousand hours is a long time, compared with the 1000 hours
of a typical tungsten lamp, and the oft-claimed but rarely achieved
8000 hours of a CFL.

There are 8760 hours in a year, so you're probably looking at - what,
eight years? - for a bulb lit for two hours per day in the summer and
six hours per day in the winter.

but, in a shop window displya, they may be on for 24 hours a day. 1000
hours is about 6 weeks - so a few thousand hours might be a year - if you
are lucky.

--
From KT24

Using a RISC OS computer running v5.16

Lighting question
 

On Sat, 9 Oct 2010 15:49:50 +0100, Ian Jackson
wrote:

I first started using CFLs four or five (?) years ago. Most of the
lights in the house (those which can be CFLs) are now CFLs. I've never
had to replace one.

I started using CFLs 1987 and some of them still working.

Lighting question
 

Ian Jackson wrote:
In message , Mark Carver
writes
Max Demian wrote:

You've got it the wrong way round. It's CFLs that contain mercury
(and if one blows up you are supposed to abandon the house and call
in a decontamination team).

Remind me how long fluorescent tubes have been in use domestically in
the UK ?

I first started using CFLs four or five (?) years ago. Most of the
lights in the house (those which can be CFLs) are now CFLs. I've never
had to replace one.

That's not answering my question Ian :-)

--
Mark
Please replace invalid and invalid with gmx and net to reply.

www.paras.org.uk

Lighting question
 

"Dave Plowfool" wrote in message
...
In article ,
j r powell wrote:

"Dave Plowman (News)" wrote in message
...

They're very picky who they let post. Jamie got his arse kicked after
his first post.

In your dreams, Plowfool.
(he's very bitter because I made a fool out of him).

Still in denial, pet?

You're the one in denial, Plowfool.

I sailed on the Nile last August though, which, given your low IQ, might be
close enough to make you feel inappropriately smug.

jamie.
--

Lighting question
 

On Sat, 09 Oct 2010 16:21:36 +0100, Mark Carver
wrote:

Ian Jackson wrote:
In message , Mark Carver
writes
Max Demian wrote:

You've got it the wrong way round. It's CFLs that contain mercury
(and if one blows up you are supposed to abandon the house and call
in a decontamination team).

Remind me how long fluorescent tubes have been in use domestically in
the UK ?

I first started using CFLs four or five (?) years ago. Most of the
lights in the house (those which can be CFLs) are now CFLs. I've never
had to replace one.

That's not answering my question Ian :-)

T depends what you mean by "domestically". When I bought this house in
1973 the garage was lit by fluorescent tubes (it still is). There was
nothing unusual about that.

Some people had fluorescent tubes in their kitchens at that time.

--
Peter Duncanson
(in uk.tech.digital-tv)

Lighting question
 

Peter Duncanson wrote:
On Sat, 09 Oct 2010 16:21:36 +0100, Mark Carver
wrote:

Ian Jackson wrote:
In message , Mark Carver
writes
Max Demian wrote:

You've got it the wrong way round. It's CFLs that contain mercury
(and if one blows up you are supposed to abandon the house and call
in a decontamination team).
Remind me how long fluorescent tubes have been in use domestically in
the UK ?

I first started using CFLs four or five (?) years ago. Most of the
lights in the house (those which can be CFLs) are now CFLs. I've never
had to replace one.
That's not answering my question Ian :-)

T depends what you mean by "domestically". When I bought this house in
1973 the garage was lit by fluorescent tubes (it still is). There was
nothing unusual about that.

Some people had fluorescent tubes in their kitchens at that time.

Indeed, my parents had them in use in their house from new in 1966, I'm too
young to remember their house before that. Anyway, I don't recall any safety
fears about broken tubes from the last century, it's all started up in recent
'nanny state' years, and CFLs are no more hazardous than good old fluorescent
tubes ?


--
Mark
Please replace invalid and invalid with gmx and net to reply.

www.paras.org.uk

Lighting question
 

In article ,
Mark Carver wrote:


Indeed, my parents had them in use in their house from new in 1966, I'm
too young to remember their house before that. Anyway, I don't recall
any safety fears about broken tubes from the last century, it's all
started up in recent 'nanny state' years, and CFLs are no more hazardous
than good old fluorescent tubes ?


I put a fluorescent fitting in the kitchen of our first house in 1964 and
they weren't particularly new at that time.

But I don't think it's all 'nanny state'. There were materials we used
like "Rawlplastic" (asbestos fibres) - for plugging screw holes in walls
-that nobody considered dangerous at the time. I can remember when BBC RD
had an open bath of mercury in one of the labs which was used as a variable
delay line.

--
From KT24

Using a RISC OS computer running v5.16

Lighting question
 

charles wrote:

but, in a shop window displya, they may be on for 24 hours a day. 1000
hours is about 6 weeks - so a few thousand hours might be a year - if you
are lucky.

Good point about the show window display. But of course that applies
to whatever type of light you are using. I understand a traditional
fluorescent tube will last around 20,000 hours if left on continuously.
Does that seem right?

My point was that a LED life of "a few thousand hours" is very
comparable with existing light sources such as CFL and fluorescents,
and somewhat better than tungsten.

SteveT

Lighting question
 

On Sat, 09 Oct 2010 11:19:36 +0100, Ian Jackson wrote:

As the Americans might say "CFL sucks"

Because in the CFL they always punt on the 3rd down? ;)

Lighting question
 

"Alan" wrote in message
...
In message , Steve Terry
wrote

You'll be binning them soon when LED bulbs get cheaper,
CFL bulbs are a dead technology.

LED Such as:
http://www.dealextreme.com/details.dx/sku.37161

In my experience these higher power LEDs only have a working life of a few
thousand hours unless you can keep the semiconductor junction temperature
cool. The average light fitting will not allow them to run cool.
Alan


But it's very early days, give it ten years LED's be refined and cheap

Steve Terry
--
"I would like to plead for my right to investigate natural phenomena
without having guns pointed at me.
I also ask for the right to be wrong without being hanged for it."
- Wilhelm Reich, November 1947