Greetings, all. Been awhile.

My kitchen is presently lit by eight PAR38s, four on each of two
tracks. Presently, I'm running GE's HIR 60w 25° floods (1260 lm, 4700
cbcp, 4200 h, 2800K and obviously ~99 CRI; specs at http://tinyurl.com/48e6ok
). These provide acceptable illumination, but I'd like to cut down on
power consumption and unintended space heating, so I'm looking for
options.

One that occurs to me is Philips' integral-ballast E26-base CMH 25w
25° flood PAR38 (1275 lm, 5000 mbcp, 3000K and 87 CRI, specs at
http://tinyurl.com/3eanfb ). No life rating is given, though I'm
assuming it's quite long. This is a relatively costly lamp, around
$109/ea according to a quick web search. I am put off by the low CRI
and would probably also prefer a somewhat higher CCT. Is anyone else
making lamps along these lines?

I also haven't really looked into CFL options, though the last time I
checked (admittedly quite awhile ago) the photometrics were quite poor
from CFL PARs.

Suggestions and comments much appreciated.

-DS

On Tue, 17 Jun 2008 14:36:10 -0700 (PDT), "Daniel J. Stern"
dastern at (no spam) engin.umich.edu> wrote:

Greetings, all. Been awhile.

My kitchen is presently lit by eight PAR38s, four on each of two
tracks. Presently, I'm running GE's HIR 60w 25° floods (1260 lm, 4700
cbcp, 4200 h, 2800K and obviously ~99 CRI; specs at
http://tinyurl.com/48e6ok
). These provide acceptable illumination, but I'd like to cut down on
power consumption and unintended space heating, so I'm looking for
options.

One that occurs to me is Philips' integral-ballast E26-base CMH 25w
25° flood PAR38 (1275 lm, 5000 mbcp, 3000K and 87 CRI, specs at
http://tinyurl.com/3eanfb ). No life rating is given, though I'm
assuming it's quite long. This is a relatively costly lamp, around
$109/ea according to a quick web search. I am put off by the low CRI
and would probably also prefer a somewhat higher CCT. Is anyone else
making lamps along these lines?

If you're willing to spend $109 each, the CMH would seem to
be your best option. The CCT is higher than your present
incandescent lamps and I don't think that the lower CRI will
be an issue. (Unlike tri-phosphor fluorescent lamps, CMH
does not "game" the system, as they don't have the same SPD
design flexibility.

I also haven't really looked into CFL options, though the last time I
checked (admittedly quite awhile ago) the photometrics were quite poor
from CFL PARs.

The photometrics for CFL reflector lamps will always be
worse than incandescent reflector lamps due to the larger
source size of the CFL compared to an incandescent filament.
Suggestions and comments much appreciated.

-DS

You can take a look at the CREE LLF LR6 lamp. Based on DOE
data it beats the best CFL reflector lamp. The CRI is 92
and the CCT is 2700K or 3500K. However, the output is only
650 lumens, so you will be giving up half the light of your
incandescent lamps. It's also designed for 6" downlights
and may not fit into a fixture using a PAR38.

--
Vic Roberts
http://www.RobertsResearchInc.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.

"Victor Roberts" <xxx at (no spam) lighting-research.com> wrote in message
news:mbpg549kd2nf56qmeegd9r3o1hosmg52es at (no spam) 4ax.com...
On Tue, 17 Jun 2008 14:36:10 -0700 (PDT), "Daniel J. Stern"
dastern at (no spam) engin.umich.edu> wrote:

Greetings, all. Been awhile.

My kitchen is presently lit by eight PAR38s, four on each of two
tracks. Presently, I'm running GE's HIR 60w 25° floods (1260 lm, 4700
cbcp, 4200 h, 2800K and obviously ~99 CRI; specs at
http://tinyurl.com/48e6ok
). These provide acceptable illumination, but I'd like to cut down on
power consumption and unintended space heating, so I'm looking for
options.

One that occurs to me is Philips' integral-ballast E26-base CMH 25w
25° flood PAR38 (1275 lm, 5000 mbcp, 3000K and 87 CRI, specs at
http://tinyurl.com/3eanfb ). No life rating is given, though I'm
assuming it's quite long. This is a relatively costly lamp, around
$109/ea according to a quick web search. I am put off by the low CRI
and would probably also prefer a somewhat higher CCT. Is anyone else
making lamps along these lines?

If you're willing to spend $109 each, the CMH would seem to
be your best option. The CCT is higher than your present
incandescent lamps and I don't think that the lower CRI will
be an issue. (Unlike tri-phosphor fluorescent lamps, CMH
does not "game" the system, as they don't have the same SPD
design flexibility.

I also haven't really looked into CFL options, though the last time I
checked (admittedly quite awhile ago) the photometrics were quite poor
from CFL PARs.

The photometrics for CFL reflector lamps will always be
worse than incandescent reflector lamps due to the larger
source size of the CFL compared to an incandescent filament.
Suggestions and comments much appreciated.

-DS

You can take a look at the CREE LLF LR6 lamp. Based on DOE
data it beats the best CFL reflector lamp. The CRI is 92
and the CCT is 2700K or 3500K. However, the output is only
650 lumens, so you will be giving up half the light of your
incandescent lamps. It's also designed for 6" downlights
and may not fit into a fixture using a PAR38.

--
Vic Roberts
http://www.RobertsResearchInc.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.



The Cree LLF LR6 is not designed for this application. I don't expect to
see a true Par38 replacement product for at least a year.

the LR6 is designed to be held in place utilizing three metal fingers
(tension against the recessed housing), and the socket is not considered
weight bearing per se... honestly the overall size of the LR6 would most
likely prohibit using it within the confines of a track head.

Willy

Greetings, all. Been awhile.

My kitchen is presently lit by eight PAR38s, four on each of two
tracks. Presently, I'm running GE's HIR 60w 25° floods (1260 lm, 4700
cbcp, 4200 h, 2800K and obviously ~99 CRI; specs at
http://tinyurl.com/48e6ok ). These provide acceptable illumination,
but I'd like to cut down on
power consumption and unintended space heating, so I'm looking for
options.

One that occurs to me is Philips' integral-ballast E26-base CMH 25w
25° flood PAR38 (1275 lm, 5000 mbcp, 3000K and 87 CRI, specs at
http://tinyurl.com/3eanfb ). No life rating is given, though I'm
assuming it's quite long. This is a relatively costly lamp, around
$109/ea according to a quick web search. I am put off by the low CRI
and would probably also prefer a somewhat higher CCT. Is anyone else
making lamps along these lines?

I also haven't really looked into CFL options, though the last time I
checked (admittedly quite awhile ago) the photometrics were quite poor
from CFL PARs.

Suggestions and comments much appreciated.

-DS
--

I started out with seven 60-watt GE HIR PAR38s (...) I swapped them out for
Philip's 25-watt CDMs but found
the light to be a tad too purple/pink for my taste.

If you are concerned about power consumption, you can't do better
than warm bi-component triphosphor fluorescents at 2700K, which give
excellent results. I have installed four such lamps in my mother's
kitchen fan 2 years ago

(http://ioannis.virtualcomposer2000.com/spectroscope/figs/Lamps/col30.jpg)

and since seeing them, all her friends, have asked me to install
similar CFLs on their kitchen ceiling fans.

There was an article, long time ago in the TIME-LIFE encyclopedia
(volume: Light & Vision, which I don't own anymore), which concluded
that warmer colors are the colors preferred in kitchens, because
sources with high blue content tend to drive consumers away from
foods.

Hmm. Not a bad idea for a diet.

Daniel J. Stern wrote:
Greetings, all. Been awhile.

My kitchen is presently lit by eight PAR38s, four on each of two
tracks. Presently, I'm running GE's HIR 60w 25° floods (1260 lm, 4700
cbcp, 4200 h, 2800K and obviously ~99 CRI; specs at
http://tinyurl.com/48e6ok ). These provide acceptable illumination,
but I'd like to cut down on
power consumption and unintended space heating, so I'm looking for
options.

One that occurs to me is Philips' integral-ballast E26-base CMH 25w
25° flood PAR38 (1275 lm, 5000 mbcp, 3000K and 87 CRI, specs at
http://tinyurl.com/3eanfb ). No life rating is given, though I'm
assuming it's quite long. This is a relatively costly lamp, around
$109/ea according to a quick web search. I am put off by the low CRI
and would probably also prefer a somewhat higher CCT. Is anyone else
making lamps along these lines?

I also haven't really looked into CFL options, though the last time I
checked (admittedly quite awhile ago) the photometrics were quite poor
from CFL PARs.

Suggestions and comments much appreciated.

There was an article, long time ago in the TIME-LIFE encyclopedia (volume: Light
& Vision, which I don't own anymore), which concluded that warmer colors are the
colors preferred in kitchens, because sources with high blue content tend to
drive consumers away from foods.

On Jun 18, 5:02 pm, Paul M. Eldridge <paul.eldri... at (no spam) ns.sympatico.ca
wrote:

I started out with seven 60-watt GE HIR PAR38s (...) I swapped them out for
Philip's 25-watt CDMs but found
the light to be a tad too purple/pink for my taste.

Interesting. I was a little concerned about that. What kind of run-up/
startup behaviour did you see from the CDMs? How long to achieve full
intensity? Hot-restrike tolerance?

Thanks for the data points...