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