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| Science Forum Index » Engineering - Lighting Forum » Something new for CFL ceiling lighting?... |
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Message |
| Sarah Austin... |
 Posted: Wed Oct 14, 2009 8:46 pm |
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Guest
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We're switching over from incandescent to 27 watt dual 5100k or 5500k
CFL's in the various rooms of this modular house.
These CFL's specify that a fixture be open, though, so as not to have a
heat buildup, I suppose.
The fixtures we have now are like this:
http://images.become.com/imageserver/s0/376930170-175-150-5-0/
clear ribbed bowl lights, but closed.
We'd rather not have to buy all new fixtures for the whole house, so I was
wondering if there were clear ribbed glass plates that we could replace
the bowls with, that would make open fixtures out of the existing ones,
and would let as much of the light out, as possible, too?
Even if they had something like a clear glass plate with leafed patterns
on it, and a hole in the middle to mount under the CFL's, it would be
great, but I cant find anything like that.
Suggestions? |
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| Jeff Engel... |
| Posted: Thu Oct 15, 2009 6:05 am |
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Have you previewed the 5100K CFLs in the fixture that is currently
installed? Do you like the result? Most people would find 5100K to be
too cool. The CFLs are medium base screw in lamps? Every time you
replace this type of lamp, you replace the electronic ballast. With a
pin base CFL, the ballast is part of the fixture, not replaced each time
a lamp expires. Over time, this should be the cheaper option.
There's not much hope in replacing the glass, making it open. This
isn't an especially expensive fixture, so it's no great loss to start
with a dedicated CFL fixture. You are making a decision that will be a
constant contentment or an irritation. The cost isn't really the big
issue, it's how satisfied you are with the result. Shop at a lighting
showroom or distributor that sells to the building trades and
electricians. You'll get good advice and more options than the Home
Depot aisle can offer.
Sarah Austin wrote:
[quote:440ea270e3]We're switching over from incandescent to 27 watt dual 5100k or 5500k
CFL's in the various rooms of this modular house.
These CFL's specify that a fixture be open, though, so as not to have a
heat buildup, I suppose.
The fixtures we have now are like this:
http://images.become.com/imageserver/s0/376930170-175-150-5-0/
clear ribbed bowl lights, but closed.
We'd rather not have to buy all new fixtures for the whole house, so I was
wondering if there were clear ribbed glass plates that we could replace
the bowls with, that would make open fixtures out of the existing ones,
and would let as much of the light out, as possible, too?
Even if they had something like a clear glass plate with leafed patterns
on it, and a hole in the middle to mount under the CFL's, it would be
great, but I cant find anything like that.
Suggestions?
[/quote:440ea270e3] |
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| Victor Roberts... |
| Posted: Thu Oct 15, 2009 10:34 am |
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Guest
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On Wed, 14 Oct 2009 21:46:08 -0500, Sarah Austin
<SAustin at (no spam) pndfnospam.com> wrote:
[quote:999e2997e1]We're switching over from incandescent to 27 watt dual 5100k or 5500k
CFL's in the various rooms of this modular house.
These CFL's specify that a fixture be open, though, so as not to have a
heat buildup, I suppose.
The fixtures we have now are like this:
http://images.become.com/imageserver/s0/376930170-175-150-5-0/
clear ribbed bowl lights, but closed.
We'd rather not have to buy all new fixtures for the whole house, so I was
wondering if there were clear ribbed glass plates that we could replace
the bowls with, that would make open fixtures out of the existing ones,
and would let as much of the light out, as possible, too?
Even if they had something like a clear glass plate with leafed patterns
on it, and a hole in the middle to mount under the CFL's, it would be
great, but I cant find anything like that.
Suggestions?
[/quote:999e2997e1]
Why are you switching to 5100K or above? Is this a decision
you made after studying different color temperatures, or was
this suggested or mandated by someone else?
The incandescent lamps you are taking out have a color
temperature of about 2700K. 5100K is close to the color
temperature of the sun, and most people find that a lamp
this "blue" make skin tones look terrible.
As for the fixture, there are fixtures with "bowl" type
glass refractors on the bottom, that are still open at the
top. They might be an acceptable alternative to the fixture
you have.
--
Vic Roberts
http://www.RobertsResearchInc.com
http://www.cflfacts.com
To reply via e-mail:
replace xxx with vdr in the Reply to: address
or use e-mail address listed at the Web site.
This information is provided for educational purposes only.
It may not be used in any publication or posted on any Web
site without written permission. |
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| Wes... |
| Posted: Thu Oct 15, 2009 6:47 pm |
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Guest
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"Sarah Austin" <SAustin at (no spam) pndfnospam.com> wrote in message
news:Xns9CA4D3492C7D9SntzldfrdSntzldfrdco at (no spam) 216.196.97.142...
[quote:7905dcac3b]We're switching over from incandescent to 27 watt dual 5100k or 5500k
CFL's in the various rooms of this modular house.
These CFL's specify that a fixture be open, though, so as not to have a
heat buildup, I suppose.
The fixtures we have now are like this:
http://images.become.com/imageserver/s0/376930170-175-150-5-0/
clear ribbed bowl lights, but closed.
We'd rather not have to buy all new fixtures for the whole house, so I was
wondering if there were clear ribbed glass plates that we could replace
the bowls with, that would make open fixtures out of the existing ones,
and would let as much of the light out, as possible, too?
Even if they had something like a clear glass plate with leafed patterns
on it, and a hole in the middle to mount under the CFL's, it would be
great, but I cant find anything like that.
Suggestions?
[/quote:7905dcac3b]
Sarah:
I'm a sales rep in the lighting industry. Trust me when I tell you, you can
replace the fixtures for less that you could find replacement glass. And
actually, as far as the UL label is concerned (not that you would care) but
the fixture is NOT approved to use a different glass. (Yeah I know people
do that, but technically they shouldn't).
Personally I wouldn't be concerned about heat build up... 27 watts really
isn't anything compared to the heat the fixture would contain with
incandescent.
However, are you SURE you want to go to 5100K?
Honestly, 2700 or perhaps 3500, but that's going to be a very harsh blue
light....
Just my thoughts.
Wes |
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| TKM... |
| Posted: Thu Oct 15, 2009 7:07 pm |
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"Wes" <wesk at (no spam) prodigy.net> wrote in message
news:DaGdncThCtssX0rXnZ2dnUVZ_vydnZ2d at (no spam) giganews.com...
[quote:cb62c1067b]"Sarah Austin" <SAustin at (no spam) pndfnospam.com> wrote in message
news:Xns9CA4D3492C7D9SntzldfrdSntzldfrdco at (no spam) 216.196.97.142...
We're switching over from incandescent to 27 watt dual 5100k or 5500k
CFL's in the various rooms of this modular house.
These CFL's specify that a fixture be open, though, so as not to have a
heat buildup, I suppose.
The fixtures we have now are like this:
http://images.become.com/imageserver/s0/376930170-175-150-5-0/
clear ribbed bowl lights, but closed.
We'd rather not have to buy all new fixtures for the whole house, so I
was
wondering if there were clear ribbed glass plates that we could replace
the bowls with, that would make open fixtures out of the existing ones,
and would let as much of the light out, as possible, too?
Even if they had something like a clear glass plate with leafed patterns
on it, and a hole in the middle to mount under the CFL's, it would be
great, but I cant find anything like that.
Suggestions?
Sarah:
I'm a sales rep in the lighting industry. Trust me when I tell you, you
can replace the fixtures for less that you could find replacement glass.
And actually, as far as the UL label is concerned (not that you would
care) but the fixture is NOT approved to use a different glass. (Yeah I
know people do that, but technically they shouldn't).
Personally I wouldn't be concerned about heat build up... 27 watts really
isn't anything compared to the heat the fixture would contain with
incandescent.
However, are you SURE you want to go to 5100K?
Honestly, 2700 or perhaps 3500, but that's going to be a very harsh blue
light....
Just my thoughts.
Wes
[/quote:cb62c1067b]
Good advice from Wes. CFLs that are less heat tolerant are marked that they
have to be used in open fixtures. Most CFLs, however, are not marked and
they can be used in either enclosed or open fixtures. UL tests such CFLs
for electrical and fire safety in enclosures.
Your chances of getting a good CFL go up if you buy those marked as Energy
Star.
Terry McGowan |
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| Sarah Austin... |
| Posted: Thu Oct 15, 2009 11:05 pm |
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Victor Roberts <xxx at (no spam) lighting-research.com> wrote :
[quote:4cafd80439]On Wed, 14 Oct 2009 21:46:08 -0500, Sarah Austin
SAustin at (no spam) pndfnospam.com> wrote:
We're switching over from incandescent to 27 watt dual 5100k or 5500k
CFL's in the various rooms of this modular house.
These CFL's specify that a fixture be open, though, so as not to have
a heat buildup, I suppose.
The fixtures we have now are like this:
http://images.become.com/imageserver/s0/376930170-175-150-5-0/
clear ribbed bowl lights, but closed.
We'd rather not have to buy all new fixtures for the whole house, so
I was wondering if there were clear ribbed glass plates that we could
replace the bowls with, that would make open fixtures out of the
existing ones, and would let as much of the light out, as possible,
too?
Even if they had something like a clear glass plate with leafed
patterns on it, and a hole in the middle to mount under the CFL's, it
would be great, but I cant find anything like that.
Suggestions?
Why are you switching to 5100K or above? Is this a decision
you made after studying different color temperatures, or was
this suggested or mandated by someone else?
The incandescent lamps you are taking out have a color
temperature of about 2700K. 5100K is close to the color
temperature of the sun, and most people find that a lamp
this "blue" make skin tones look terrible.
[/quote:4cafd80439]
It's full spectrum though, right? Most natural?
[quote:4cafd80439]As for the fixture, there are fixtures with "bowl" type
glass refractors on the bottom, that are still open at the
top. They might be an acceptable alternative to the fixture
you have.
[/quote:4cafd80439] |
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| Sarah Austin... |
| Posted: Thu Oct 15, 2009 11:06 pm |
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Guest
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"Wes" <wesk at (no spam) prodigy.net> wrote :
[quote:20594c7f99]"Sarah Austin" <SAustin at (no spam) pndfnospam.com> wrote in message
news:Xns9CA4D3492C7D9SntzldfrdSntzldfrdco at (no spam) 216.196.97.142...
We're switching over from incandescent to 27 watt dual 5100k or
5500k CFL's in the various rooms of this modular house.
These CFL's specify that a fixture be open, though, so as not to
have a heat buildup, I suppose.
The fixtures we have now are like this:
http://images.become.com/imageserver/s0/376930170-175-150-5-0/
clear ribbed bowl lights, but closed.
We'd rather not have to buy all new fixtures for the whole house, so
I was wondering if there were clear ribbed glass plates that we
could replace the bowls with, that would make open fixtures out of
the existing ones, and would let as much of the light out, as
possible, too?
Even if they had something like a clear glass plate with leafed
patterns on it, and a hole in the middle to mount under the CFL's,
it would be great, but I cant find anything like that.
Suggestions?
Sarah:
I'm a sales rep in the lighting industry. Trust me when I tell you,
you can replace the fixtures for less that you could find replacement
glass. And actually, as far as the UL label is concerned (not that
you would care) but the fixture is NOT approved to use a different
glass. (Yeah I know people do that, but technically they shouldn't).
Personally I wouldn't be concerned about heat build up... 27 watts
really isn't anything compared to the heat the fixture would contain
with incandescent.
However, are you SURE you want to go to 5100K?
Honestly, 2700 or perhaps 3500, but that's going to be a very harsh
blue light....
Just my thoughts.
[/quote:20594c7f99]
I thought full spectrum was supposed to be best for people and animals. |
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| Rusty... |
| Posted: Fri Oct 16, 2009 12:51 am |
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Guest
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"Sarah Austin" <SAustin at (no spam) pndfnospam.com> wrote in message
news:Xns9CA5EB1C92643SntzldfrdSntzldfrdco at (no spam) 216.196.97.142...
[quote:35b54f97b2]"Wes" <wesk at (no spam) prodigy.net> wrote :
"Sarah Austin" <SAustin at (no spam) pndfnospam.com> wrote in message
news:Xns9CA4D3492C7D9SntzldfrdSntzldfrdco at (no spam) 216.196.97.142...
We're switching over from incandescent to 27 watt dual 5100k or
5500k CFL's in the various rooms of this modular house.
These CFL's specify that a fixture be open, though, so as not to
have a heat buildup, I suppose.
The fixtures we have now are like this:
http://images.become.com/imageserver/s0/376930170-175-150-5-0/
clear ribbed bowl lights, but closed.
We'd rather not have to buy all new fixtures for the whole house, so
I was wondering if there were clear ribbed glass plates that we
could replace the bowls with, that would make open fixtures out of
the existing ones, and would let as much of the light out, as
possible, too?
Even if they had something like a clear glass plate with leafed
patterns on it, and a hole in the middle to mount under the CFL's,
it would be great, but I cant find anything like that.
Suggestions?
Sarah:
I'm a sales rep in the lighting industry. Trust me when I tell you,
you can replace the fixtures for less that you could find replacement
glass. And actually, as far as the UL label is concerned (not that
you would care) but the fixture is NOT approved to use a different
glass. (Yeah I know people do that, but technically they shouldn't).
Personally I wouldn't be concerned about heat build up... 27 watts
really isn't anything compared to the heat the fixture would contain
with incandescent.
However, are you SURE you want to go to 5100K?
Honestly, 2700 or perhaps 3500, but that's going to be a very harsh
blue light....
Just my thoughts.
I thought full spectrum was supposed to be best for people and animals.
[/quote:35b54f97b2]
Ah-ha! Full spectrum is just a fancy marketing term. Search this group and
you will see past discussions on full spectrum.
Wikipedia also has a good summary:
http://en.wikipedia.org/wiki/Full-spectrum_light
A good CRI (Color Rendering Index,) is all that really matters. Those yucky
cheap cool white T12s fluorecents have a CRI around 65, whereas the best
tri-phosphor fluorescent lights get around 90ish CRI. A CRI of 100 would be
an incandescent/halogen light. |
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| JB... |
| Posted: Fri Oct 16, 2009 2:58 am |
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Guest
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"Sarah Austin" <SAustin at (no spam) pndfnospam.com> wrote in message
news:Xns9CA5EAEAE9AACSntzldfrdSntzldfrdco at (no spam) 216.196.97.142...
[quote:5423f96299]Victor Roberts <xxx at (no spam) lighting-research.com> wrote :
On Wed, 14 Oct 2009 21:46:08 -0500, Sarah Austin
SAustin at (no spam) pndfnospam.com> wrote:
We're switching over from incandescent to 27 watt dual 5100k or 5500k
CFL's in the various rooms of this modular house.
These CFL's specify that a fixture be open, though, so as not to have
a heat buildup, I suppose.
The fixtures we have now are like this:
http://images.become.com/imageserver/s0/376930170-175-150-5-0/
clear ribbed bowl lights, but closed.
We'd rather not have to buy all new fixtures for the whole house, so
I was wondering if there were clear ribbed glass plates that we could
replace the bowls with, that would make open fixtures out of the
existing ones, and would let as much of the light out, as possible,
too?
Even if they had something like a clear glass plate with leafed
patterns on it, and a hole in the middle to mount under the CFL's, it
would be great, but I cant find anything like that.
Suggestions?
Why are you switching to 5100K or above? Is this a decision
you made after studying different color temperatures, or was
this suggested or mandated by someone else?
The incandescent lamps you are taking out have a color
temperature of about 2700K. 5100K is close to the color
temperature of the sun, and most people find that a lamp
this "blue" make skin tones look terrible.
It's full spectrum though, right? Most natural?
Sadly they will be nothing remotely like 'full spectrum'. I do so hate that[/quote:5423f96299]
term when applied to fluorescents.
JB |
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| Joe... |
| Posted: Fri Oct 16, 2009 7:41 am |
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Guest
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On Fri, 16 Oct 2009 00:06:39 -0500, Sarah Austin
<SAustin at (no spam) pndfnospam.com> wrote:
[snip]
[quote:fc8da25970]
I thought full spectrum was supposed to be best for people and animals.
[/quote:fc8da25970]
Sarah,
I just want to expand on Rusty's good observation.
If you don't understand the full lighting picture, you can think of
sunlight as having a fairly even mix of all possible "colors" (with
some greater emphasis on the more blue end). Fluorescent lights, in
contrast, have a relatively few spikes of individual "color groups",
that blend together to give an appearance of white light. The problem
is that colors that do not occur in the aforementioned "color groups"
are not illuminated as well as other colors, and therefore seem
deficient to the observer. Skin tones, for example, are rather
complex, and are very difficult to illuminate evenly with many
fluorescents.
The CRI index is a figure that takes our human perception of colors
into account; that's why it is a much better gauge of how well a given
lamp will perform in your home.
And yeah, 5100K is way too blue for the inside of a house - and I say
that even with my individual preference for higher color temp lights,
especially in my shop.
Another comment on using compacts inside enclosed housings - my
(admittedly limited) experience is that most of the cheaper CFs cannot
tolerate even their own heat output without good air circulation. The
cheapest part - the ballast - is what fails. I'd like to know of some
brands that can be used inside closed fixtures other than ceiling
cans.
Joe
Please remember that the above comments are geared to a less
technically-inclined person, and are in no way the "real scientific
deal". |
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| Rusty... |
| Posted: Fri Oct 16, 2009 10:58 am |
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Guest
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"Rusty" <russjunkmail at (no spam) netscape.net> wrote in message
news:hb957f$h8g$1 at (no spam) aioe.org...
[quote:f44b37dcfd]
"Sarah Austin" <SAustin at (no spam) pndfnospam.com> wrote in message
news:Xns9CA5EB1C92643SntzldfrdSntzldfrdco at (no spam) 216.196.97.142...
"Wes" <wesk at (no spam) prodigy.net> wrote :
"Sarah Austin" <SAustin at (no spam) pndfnospam.com> wrote in message
news:Xns9CA4D3492C7D9SntzldfrdSntzldfrdco at (no spam) 216.196.97.142...
We're switching over from incandescent to 27 watt dual 5100k or
5500k CFL's in the various rooms of this modular house.
These CFL's specify that a fixture be open, though, so as not to
have a heat buildup, I suppose.
The fixtures we have now are like this:
http://images.become.com/imageserver/s0/376930170-175-150-5-0/
clear ribbed bowl lights, but closed.
We'd rather not have to buy all new fixtures for the whole house, so
I was wondering if there were clear ribbed glass plates that we
could replace the bowls with, that would make open fixtures out of
the existing ones, and would let as much of the light out, as
possible, too?
Even if they had something like a clear glass plate with leafed
patterns on it, and a hole in the middle to mount under the CFL's,
it would be great, but I cant find anything like that.
Suggestions?
Sarah:
I'm a sales rep in the lighting industry. Trust me when I tell you,
you can replace the fixtures for less that you could find replacement
glass. And actually, as far as the UL label is concerned (not that
you would care) but the fixture is NOT approved to use a different
glass. (Yeah I know people do that, but technically they shouldn't).
Personally I wouldn't be concerned about heat build up... 27 watts
really isn't anything compared to the heat the fixture would contain
with incandescent.
However, are you SURE you want to go to 5100K?
Honestly, 2700 or perhaps 3500, but that's going to be a very harsh
blue light....
Just my thoughts.
I thought full spectrum was supposed to be best for people and animals.
Ah-ha! Full spectrum is just a fancy marketing term. Search this group
and you will see past discussions on full spectrum.
Wikipedia also has a good summary:
http://en.wikipedia.org/wiki/Full-spectrum_light
A good CRI (Color Rendering Index,) is all that really matters. Those
yucky cheap cool white T12s fluorecents have a CRI around 65, whereas the
best tri-phosphor fluorescent lights get around 90ish CRI. A CRI of 100
would be an incandescent/halogen light.
Just to clarify my comments a bit further, "full spectrum" when applied to[/quote:f44b37dcfd]
fluorescent lighting is just a marketing gimmick that implies fluorescent
lights that approximates the feel of sunlight via a high color temp and
hopefully a high CRI. You would still need a high lux (brightness) and a
single point of light to get the true sunlight "feel", otherwise the high
color temp just seems "off" when used in a domestic situation.
Just as an example, I once had a dance teacher who operated a basement dance
studio that was lit entirely with cheap cool white (4100K at (no spam) 67CRI) T12
fluorescent tubes. It honestly felt like an old warehouse with a wooden
floor and mirrors. She said that she had heard of "Full Spectrum" lights
and wanted them installed.
I knew that those full spectrum lights would be way too expensive to replace
40 tubes, so I opted to replace the tubes with SPEC35 (3500K at (no spam) 85CRI)
tubes. The cost was only about twice as much compared to the old tubes. The
difference was like night and day, and she was very happy with the result. |
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| Joe... |
| Posted: Fri Oct 16, 2009 11:47 am |
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Guest
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On Fri, 16 Oct 2009 09:41:59 -0400, Joe <see_real_one at (no spam) sig.lin> wrote:
[quote:0b826f6340]On Fri, 16 Oct 2009 00:06:39 -0500, Sarah Austin
SAustin at (no spam) pndfnospam.com> wrote:
[snip]
I thought full spectrum was supposed to be best for people and animals.
Sarah,
I just want to expand on Rusty's good observation.
If you don't understand the full lighting picture, you can think of
sunlight as having a fairly even mix of all possible "colors" (with
some greater emphasis on the more blue end). Fluorescent lights, in
contrast, have a relatively few spikes of individual "color groups",
that blend together to give an appearance of white light. The problem
is that colors that do not occur in the aforementioned "color groups"
are not illuminated as well as other colors, and therefore seem
deficient to the observer. Skin tones, for example, are rather
complex, and are very difficult to illuminate evenly with many
fluorescents.
The CRI index is a figure that takes our human perception of colors
into account; that's why it is a much better gauge of how well a given
lamp will perform in your home.
And yeah, 5100K is way too blue for the inside of a house - and I say
that even with my individual preference for higher color temp lights,
especially in my shop.
Another comment on using compacts inside enclosed housings - my
(admittedly limited) experience is that most of the cheaper CFs cannot
tolerate even their own heat output without good air circulation. The
cheapest part - the ballast - is what fails. I'd like to know of some
brands that can be used inside closed fixtures other than ceiling
cans.
Joe
Please remember that the above comments are geared to a less
technically-inclined person, and are in no way the "real scientific
deal".
[/quote:0b826f6340]
OK, Rusty's reply to his post also made me want to clarify my own
comments:
In the studies I've seen, the "best" color temperature is dependant on
the overall level of light. The more blue cast of high CCT lamps looks
better (less bad?) in a brightly lit (really brightly lit)
environment. As the light level goes down - and interior lighting is
never as bright as sunlight on a sunny day - a warmer (lower) color
temperature appears more pleasing. All of this is within the photopic
range, too. So, for your application, you will need the high-CRI
lamps, and a lower color temperature, as well. Think of something less
than 3500K. You might want to compare a variety of CFs against a
halogen lamp of the same relative brightness to get an idea of the
color-rendering characteristics of your choices. Not real scientific,
but you stand a better chance of pleasing your own tastes. Hang some
artwork and put a person in the light for comparison.
Joe |
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| Sarah Austin... |
| Posted: Fri Oct 16, 2009 7:48 pm |
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Guest
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"JB" <nil at (no spam) spam.net> wrote :
[quote:5b5eff6cea]
"Sarah Austin" <SAustin at (no spam) pndfnospam.com> wrote in message
news:Xns9CA5EAEAE9AACSntzldfrdSntzldfrdco at (no spam) 216.196.97.142...
Victor Roberts <xxx at (no spam) lighting-research.com> wrote :
On Wed, 14 Oct 2009 21:46:08 -0500, Sarah Austin
SAustin at (no spam) pndfnospam.com> wrote:
We're switching over from incandescent to 27 watt dual 5100k or
5500k CFL's in the various rooms of this modular house.
These CFL's specify that a fixture be open, though, so as not to
have a heat buildup, I suppose.
The fixtures we have now are like this:
http://images.become.com/imageserver/s0/376930170-175-150-5-0/
clear ribbed bowl lights, but closed.
We'd rather not have to buy all new fixtures for the whole house,
so I was wondering if there were clear ribbed glass plates that we
could replace the bowls with, that would make open fixtures out of
the existing ones, and would let as much of the light out, as
possible, too?
Even if they had something like a clear glass plate with leafed
patterns on it, and a hole in the middle to mount under the CFL's,
it would be great, but I cant find anything like that.
Suggestions?
Why are you switching to 5100K or above? Is this a decision
you made after studying different color temperatures, or was
this suggested or mandated by someone else?
The incandescent lamps you are taking out have a color
temperature of about 2700K. 5100K is close to the color
temperature of the sun, and most people find that a lamp
this "blue" make skin tones look terrible.
It's full spectrum though, right? Most natural?
Sadly they will be nothing remotely like 'full spectrum'. I do so
hate that term when applied to fluorescents.
JB
[/quote:5b5eff6cea]
Even Vita-Lites? |
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| Sarah Austin... |
| Posted: Fri Oct 16, 2009 7:51 pm |
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Guest
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"Rusty" <russjunkmail at (no spam) netscape.net> wrote :
[quote:541e183641]
"Sarah Austin" <SAustin at (no spam) pndfnospam.com> wrote in message
news:Xns9CA5EB1C92643SntzldfrdSntzldfrdco at (no spam) 216.196.97.142...
"Wes" <wesk at (no spam) prodigy.net> wrote :
"Sarah Austin" <SAustin at (no spam) pndfnospam.com> wrote in message
news:Xns9CA4D3492C7D9SntzldfrdSntzldfrdco at (no spam) 216.196.97.142...
We're switching over from incandescent to 27 watt dual 5100k or
5500k CFL's in the various rooms of this modular house.
These CFL's specify that a fixture be open, though, so as not to
have a heat buildup, I suppose.
The fixtures we have now are like this:
http://images.become.com/imageserver/s0/376930170-175-150-5-0/
clear ribbed bowl lights, but closed.
We'd rather not have to buy all new fixtures for the whole house,
so I was wondering if there were clear ribbed glass plates that we
could replace the bowls with, that would make open fixtures out of
the existing ones, and would let as much of the light out, as
possible, too?
Even if they had something like a clear glass plate with leafed
patterns on it, and a hole in the middle to mount under the CFL's,
it would be great, but I cant find anything like that.
Suggestions?
Sarah:
I'm a sales rep in the lighting industry. Trust me when I tell
you, you can replace the fixtures for less that you could find
replacement glass. And actually, as far as the UL label is
concerned (not that you would care) but the fixture is NOT approved
to use a different glass. (Yeah I know people do that, but
technically they shouldn't).
Personally I wouldn't be concerned about heat build up... 27 watts
really isn't anything compared to the heat the fixture would
contain with incandescent.
However, are you SURE you want to go to 5100K?
Honestly, 2700 or perhaps 3500, but that's going to be a very harsh
blue light....
Just my thoughts.
I thought full spectrum was supposed to be best for people and
animals.
Ah-ha! Full spectrum is just a fancy marketing term. Search this
group and you will see past discussions on full spectrum.
Wikipedia also has a good summary:
http://en.wikipedia.org/wiki/Full-spectrum_light
A good CRI (Color Rendering Index,) is all that really matters.
Those yucky cheap cool white T12s fluorecents have a CRI around 65,
whereas the best tri-phosphor fluorescent lights get around 90ish
CRI. A CRI of 100 would be an incandescent/halogen light.
[/quote:541e183641]
http://www.amazon.com/Compact-Fluorescent-Spiral-Equivalent-
Spectrum/dp/B000NJAAQM
23 Watt Compact Fluorescent Spiral Light Bulb, 100 Watt Equivalent,
5500K Full Spectrum (High C.R.I.)
Product Features
* CRI: 90
* Average Life Hours: 10,000
* Base: Medium (Standard)
* Initial Lumens: 1200 |
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| Rusty... |
| Posted: Fri Oct 16, 2009 9:39 pm |
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Guest
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"Sarah Austin" <SAustin at (no spam) pndfnospam.com> wrote in message
news:Xns9CA4D3492C7D9SntzldfrdSntzldfrdco at (no spam) 216.196.97.142...
[quote:7925e56da7]We're switching over from incandescent to 27 watt dual 5100k or 5500k
CFL's in the various rooms of this modular house.
These CFL's specify that a fixture be open, though, so as not to have a
heat buildup, I suppose.
The fixtures we have now are like this:
http://images.become.com/imageserver/s0/376930170-175-150-5-0/
clear ribbed bowl lights, but closed.
We'd rather not have to buy all new fixtures for the whole house, so I was
wondering if there were clear ribbed glass plates that we could replace
the bowls with, that would make open fixtures out of the existing ones,
and would let as much of the light out, as possible, too?
Even if they had something like a clear glass plate with leafed patterns
on it, and a hole in the middle to mount under the CFL's, it would be
great, but I cant find anything like that.
Suggestions?
[/quote:7925e56da7]
Something occurred to me, you never really mentioned if the energy savings
was a factor.
If it's not, then might I suggest so=called daylight incandescent bulbs?
they achieve similar results by using slightly tinted glass. The bulbs are
a slight pinkish/purple/blue in color and supposedly filter out the yellow
hues associated with regular incadescent bulbs.
Brands to consider:
GE Reveal
Sylvania Daylight
Phillips Natural Light and Natural Light Plus
*some of the off brands refer to these daylight bulbs as 'full spectrum'
which is misused still, a regular incandescent bulb is already full
spectrum. |
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