Hi Gang.

I am replacing kitchen lighting with either Halogen or LED. This
raises the following Questions

1. Size for Size is does LED give the same output as Halogen?
2. If I go for Halogen lighting, how do you stop the heat build-up in
an enclosed roof space?
{the kitchen is a single story flat roof extension to the house.} I'm
also assuming that the roof space is insulated.

Any help is appreciated. I promise I won't quote you to SWMBO if it
all goes pearshaped. Although it's a good excuse.- (the boys told me)

Ronnie

ronnie wrote:
Hi Gang.

I am replacing kitchen lighting with either Halogen or LED. This
raises the following Questions

1. Size for Size is does LED give the same output as Halogen?
2. If I go for Halogen lighting, how do you stop the heat build-up in
an enclosed roof space?
{the kitchen is a single story flat roof extension to the house.} I'm
also assuming that the roof space is insulated.

Any help is appreciated. I promise I won't quote you to SWMBO if it
all goes pearshaped. Although it's a good excuse.- (the boys told me)

Ronnie
I assume you are talking downlighters. Look at this one which is low energy


http://www.tlc-direct.co.uk/Main_Ind...ving/index.htm

I am trying one and initial impressions are good

Malcolm

Malcolm wrote:
ronnie wrote:
Hi Gang.

I am replacing kitchen lighting with either Halogen or LED. This
raises the following Questions

1. Size for Size is does LED give the same output as Halogen?
2. If I go for Halogen lighting, how do you stop the heat build-up in
an enclosed roof space?
{the kitchen is a single story flat roof extension to the house.} I'm
also assuming that the roof space is insulated.

Any help is appreciated. I promise I won't quote you to SWMBO if it
all goes pearshaped. Although it's a good excuse.- (the boys told me)

Ronnie
I assume you are talking downlighters. Look at this one which is low
energy


http://www.tlc-direct.co.uk/Main_Ind...ving/index.htm


I am trying one and initial impressions are good

Malcolm

That link works better with an 'l' at the end (i.e. .html not .htm). :-)

--
Rod

Hypothyroidism is a seriously debilitating condition with an insidious
onset.
Although common it frequently goes undiagnosed.
www.thyromind.info www.thyroiduk.org www.altsupportthyroid.org

On 7 Feb, 09:51, ronnie wrote:
Hi Gang.

I am replacing kitchen lighting with either Halogen or LED. This
raises the following Questions

1. Size for Size is does LED give the same output as Halogen?

Yup, watt for watt , but LED is a lot more expensive to install to
obtain same brightness.

2. If I go for Halogen lighting, how do you stop the heat build-up in
an enclosed roof space?

Use fluro on top of cupboard units, LED strip below and in cupboards
and above kick plates.

GU10 for spotlighting possibly hob and sink , its aluminum reflector
and most of heat goes out trhe front.

GU10 fluoro is not good.

Adam
{the kitchen is a single story flat roof extension to the house.} I'm
also assuming that the roof space is insulated.

Any help is appreciated. I promise I won't quote you to SWMBO if it
all goes pearshaped. Although it's a good excuse.- (the boys told me)

Ronnie

ronnie wrote:
Hi Gang.

I am replacing kitchen lighting with either Halogen or LED. This
raises the following Questions

1. Size for Size is does LED give the same output as Halogen?

no.

2. If I go for Halogen lighting, how do you stop the heat build-up in
an enclosed roof space?

you dont. Choosing aluminium reflectors rather than dichroic will
help, but you still get heat buildup.

One option is to use LED downlighters, or better 5w halogens, to
create the effect of halogens, and fill in with concealed fluorescent
lighting to get the light level up. It'll save you thousands in run
costs.


NT

On Sun, 8 Feb 2009 08:33:36 +0000 (UTC) someone who may be
wrote this:-

Since when has lighting a room cost "thousands" (I assume you mean pounds,
not pennies)? Surely with normal use it would take a lifetime to cost
"thousands" in electricity, even to run conventional lighting.

The comparison was with halogen downlighters. So, let's do a quick
check.

10 x 50W downligters in a kitchen, 500W.

2 hours of these being on is 1 unit.

http://www.ebico.co.uk/html/e_rates.php# by eye averages around a
little over 14p per unit, say 14p.

These lamps don't last for ever. Taking the figures at
http://www.tlc-direct.co.uk/Products/LAX50GUF.html every 3000
hours we need to add the cost of 10 of these lamps, which costs over
£14 if one collects them from a branch, say £15.

3000 hours consumes 1500 units. At 14p per unit that is £210.

Adding on the replacement lamp cost that is £225 for 3000 hours.

A £1000 cost is thus roughly 13000 hours.

In a house where they are very sparing and these lamps are only on
for an average of 2 hours a day that is 6500 days, or 18 years.

On the other hand where these lamps are fitted people tend not to be
very sparing. If they are on for an average of 10 hours a day that
is roughly 3.5 years. 10 hours a day may seem ridiculous, but I have
seen houses where these things are turned on all day.




--
David Hansen, Edinburgh
I will *always* explain revoked encryption keys, unless RIP prevents me
http://www.opsi.gov.uk/acts/acts2000/00023--e.htm#54

wrote:
Thus spake ) unto the assembled multitudes:

One option is to use LED downlighters, or better 5w halogens, to
create the effect of halogens, and fill in with concealed fluorescent
lighting to get the light level up. It'll save you thousands in run
costs.

Since when has lighting a room cost "thousands" (I assume you mean pounds,
not pennies)? Surely with normal use it would take a lifetime to cost
"thousands" in electricity, even to run conventional lighting.

Since someone decided halogen downlighting was a great idea.

Lets say we run 400w of lighting in one main room - and its easy to
exceed this with halogen downlights.
6hrs a day @ 0.4kW = 2.4kWh/day = 29p
= £105 per yr

Now, we allow an equal amount for other rooms, bringing us to £210 pa.
Over a 25 yr product life that's £5,250.

I'll let you calculate for more efficient lighting, but suffice it to
say its thousands less.


NT

In article ,
David Hansen wrote:
Since when has lighting a room cost "thousands" (I assume you mean
pounds, not pennies)? Surely with normal use it would take a lifetime
to cost "thousands" in electricity, even to run conventional lighting.

The comparison was with halogen downlighters. So, let's do a quick
check.

10 x 50W downligters in a kitchen, 500W.

20 watt lamps are usually pretty ok for this sort of use. Subjectively the
light output isn't as reduced as you might think.

--
*It's lonely at the top, but you eat better.

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