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Subject Author Date
CFL vs Incandescent bonnie 04-27-2008
| ---> Re: CFL vs Incandescent Percival P. Cas...05-06-2008
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Posted by ransley on April 27, 2008, 5:58 pm
> Given, CFL's are thought to be more energy efficient than incandescent
> bulbs. But I heard they use more energy to turn on.
>
> What if it is in a room that is used infrequently, a closet or guest
> room for instance. In other words a room in which you would go in and
> out of pretty quickly.
>
> How long would a CFL have to be left on to realize the net energy
> savings.
>
> thanks for your input,
> bonnie

There is no Thought on if cfls are more efficent, they are in fact
75-80 % more. Replace them first where you save the most.

AppliancePartsPros.com, Inc.
Posted by on April 27, 2008, 6:26 pm

>Given, CFL's are thought to be more energy efficient than incandescent
>bulbs. But I heard they use more energy to turn on.

The turn-on energy difference is miniscule, but each start removes about
6 minutes (0.1 hours) from a CF's typical 6000 hour lifetime at a typical
$2 cost, vs a bulb's typical 750 hour lifetime at a typical 50 cent cost.

>What if it is in a room that is used infrequently, a closet or guest
>room for instance. In other words a room in which you would go in and
>out of pretty quickly.
>
>How long would a CFL have to be left on to realize the net energy savings.

You might better ask "How long would the CFL have to be left on per start
to save money over an incandescent bulb, with 1/4 the power consumption,
at 10 cents/kWh?"

Nick


Posted by DGDevin on April 27, 2008, 7:23 pm
nicksanspam@ece.villanova.edu wrote:

> The turn-on energy difference is miniscule, but each start removes
> about 6 minutes (0.1 hours) from a CF's typical 6000 hour lifetime at
> a typical $2 cost, vs a bulb's typical 750 hour lifetime at a typical
> 50 cent cost.

We went with CFLs a few years ago and have been somewhat disappointed in how
many we've had to replace far sooner than expected. I assume that poor
quality control at the factory could kill some bulbs with unusual speed, if
so we seem to have quite a run of back luck in that respect with different
designs from different companies, including a porch-light bulb that only
gets turned on and off once a day respectively. Still, we immediately
noticed a big drop in our electric bill, so the occasional
prematurely-expired CFL doesn't even begin to erode that.



Posted by ransley on April 27, 2008, 7:40 pm
> nicksans...@ece.villanova.edu wrote:
> > The turn-on energy difference is miniscule, but each start removes
> > about 6 minutes (0.1 hours) from a CF's typical 6000 hour lifetime at
> > a typical $2 cost, vs a bulb's typical 750 hour lifetime at a typical
> > 50 cent cost.
>
> We went with CFLs a few years ago and have been somewhat disappointed in h=
ow
> many we've had to replace far sooner than expected. =A0I assume that poor
> quality control at the factory could kill some bulbs with unusual speed, i=
f
> so we seem to have quite a run of back luck in that respect with different=

> designs from different companies, including a porch-light bulb that only
> gets turned on and off once a day respectively. =A0Still, we immediately
> noticed a big drop in our electric bill, so the occasional
> prematurely-expired CFL doesn't even begin to erode that.

Look at HDs bulbs they have a 9 year warranty and are about 2$ each

Posted by Steve on April 27, 2008, 8:21 pm
> nicksans...@ece.villanova.edu wrote:

> We went with CFLs a few years ago and have been somewhat disappointed in h=
ow
> many we've had to replace far sooner than expected. =A0I assume that poor
> quality control at the factory could kill some bulbs with unusual speed, i=
f
> so we seem to have quite a run of back luck in that respect with different=

> designs from different companies, including a porch-light bulb that only
> gets turned on and off once a day respectively. =A0Still, we immediately
> noticed a big drop in our electric bill, so the occasional
> prematurely-expired CFL doesn't even begin to erode that.

So far we have had two of about 20 or so to quit working. We figured
these two were burn't out even though they were only a year or two
old. But instead of throwing them out right away, I held onto them
for awhile or until we could bring them to a recycling or collection
place. Then, for some reason, I tried both of them in another fixture
for one last try. At my amazement, they both worked again! I just
rubbed off the end that goes into the socket really good with a
cleaning rag and that's all it took. So before you throw one out that
has quit working, give it a good rub on the end and give it a last
try! :-)
Steve

Page 4 of 13       < 1 2 3 > last >>
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