Posted by Eeyore on May 20, 2009, 8:03 pm
Ben Bradley wrote:
> In sci.electronics.design,alt.energy.homepower and
> alt.energy.renewable, On Mon, 18 May 2009 13:22:26 -0700 (PDT),
> >wrote:
> >> That's right, buy a double pack of 11 or 20W CFLs for 48 pence and get
> >> two packs free at my local supermarket.
> >>
> >> Cost per CFL = 8 pence or say 12 c US
> >
> >Good, but not completely unbeatable. Dollar store pencils, twenty to
> >a package, can be made into carbon arc rods, and the resulting
> >arc lamp:
> >(1) is brighter,
> >(2) generates more ozone
> >(3) does more damage to local RF reception
> >(4) is cheaper to re-lamp
> >
> >than even the best CFL lamp.
> >
> >Seriously, the CFL retrofit to AC lamp sockets intended for
> >incandescent lighting, even though it's the darling of the
> >green set, is a stopgap solution. In the long run, disposable
> >lamp-plus-electronics isn't the best technology.
> A certain consumer guru (http://clarkhoward.com ) says CFL's are a
> stopgap and the Next Big "Green" Thing will be LED lamps which last
> NUCH longer (maybe they'll socket the electrolytics) and not have any
> mercury or other bad substance that escapes when breaking. Dunno if I
> believe LED's will take over, new things usually do go down in price
> and up in volume, eventually upsetting older technology, but it
> doesn't always work out that way.
There are some very interesting new developments on the 'white' LED front.
Trouble is they have heatsinking problems too ( and life drops horribly when
they get too hot ), plus efficiency drops off at higher operating currents /
temperature ( normally not the quoted headline figure of course ) plus the
best efficiencies are at the blue end of the spectrum. Expect say 1/3 less
lumens at more 'normal' colour temps.
Having said that, OSRAM recently announced their latest 'TOPLED Plus' with an
efficiency ( parameters unspecified ) of 95 lumens / watt. That's quite good.
Graham
Posted by G on June 10, 2009, 4:45 pm
> wrote:
> > That's right, buy a double pack of 11 or20WCFLsfor 48penceand get
> > two packs free at my local supermarket.
> > Cost per CFL =8penceor say 12 c US
> Good, but not completely unbeatable. Dollar store pencils, twenty to
> a package,canbe made into carbon arc rods, and the resulting
> arc lamp:
> (1) is brighter,
> (2) generates more ozone
> (3) does more damage to local RF reception
> (4) is cheaper tore-lamp
> than even the best CFL lamp.
> Seriously, the CFL retrofit to AC lamp sockets intended for
> incandescent lighting, even though it's the darling of the
> green set, is a stopgap solution. In the long run, disposable
> lamp-plus-electronics isn't the best technology.
They now make a pop off glass top, separate from the base by grabbing
the coil. They have been doing that a long time in the elongated
socket types. I just put in an order today for some spots 9watts at 40
halogen equiv. I see many dimmable types now down to the $1 level.
There are companies making low mercury types. I also see up to 500
watt equivalent. Led replacements have come down in price. If you
limit the area degrees of light, they are great. Warm colors are now
common place.
Had to use Google to go back to the achieve. That's the only way I can
do it since my preferred reader does not save posts. Least here I got
spell checking, and I don't care who does not see this post.
greg
Posted by GregS on June 10, 2009, 4:53 pm
>> wrote:
>>
>> > That's right, buy a double pack of 11 or20WCFLsfor 48penceand get
>> > two packs free at my local supermarket.
>>
>> > Cost per CFL =8penceor say 12 c US
>>
>> Good, but not completely unbeatable. Dollar store pencils, twenty to
>> a package,canbe made into carbon arc rods, and the resulting
>> arc lamp:
>> (1) is brighter,
>> (2) generates more ozone
>> (3) does more damage to local RF reception
>> (4) is cheaper tore-lamp
>>
>> than even the best CFL lamp.
>>
>> Seriously, the CFL retrofit to AC lamp sockets intended for
>> incandescent lighting, even though it's the darling of the
>> green set, is a stopgap solution. In the long run, disposable
>> lamp-plus-electronics isn't the best technology.
>They now make a pop off glass top, separate from the base by grabbing
>the coil. They have been doing that a long time in the elongated
>socket types. I just put in an order today for some spots 9watts at 40
>halogen equiv. I see many dimmable types now down to the $1 level.
>There are companies making low mercury types. I also see up to 500
>watt equivalent. Led replacements have come down in price. If you
>limit the area degrees of light, they are great. Warm colors are now
>common place.
>Had to use Google to go back to the achieve. That's the only way I can
>do it since my preferred reader does not save posts. Least here I got
>spell checking, and I don't care who does not see this post.
I have not really seen a good "spot" out of a CFL. The spots
they sell are almost all floods. The glass flat front types are the best.
There is also that cold cathode type I forgot to mention.
greg
Posted by GregS on June 10, 2009, 4:57 pm
(GregS) wrote:
>>> wrote:
>>>
>>> > That's right, buy a double pack of 11 or20WCFLsfor 48penceand get
>>> > two packs free at my local supermarket.
>>>
>>> > Cost per CFL =8penceor say 12 c US
>>>
>>> Good, but not completely unbeatable. Dollar store pencils, twenty to
>>> a package,canbe made into carbon arc rods, and the resulting
>>> arc lamp:
>>> (1) is brighter,
>>> (2) generates more ozone
>>> (3) does more damage to local RF reception
>>> (4) is cheaper tore-lamp
>>>
>>> than even the best CFL lamp.
>>>
>>> Seriously, the CFL retrofit to AC lamp sockets intended for
>>> incandescent lighting, even though it's the darling of the
>>> green set, is a stopgap solution. In the long run, disposable
>>> lamp-plus-electronics isn't the best technology.
>>
>>They now make a pop off glass top, separate from the base by grabbing
>>the coil. They have been doing that a long time in the elongated
>>socket types. I just put in an order today for some spots 9watts at 40
>>halogen equiv. I see many dimmable types now down to the $1 level.
>>There are companies making low mercury types. I also see up to 500
>>watt equivalent. Led replacements have come down in price. If you
>>limit the area degrees of light, they are great. Warm colors are now
>>common place.
>>
>>Had to use Google to go back to the achieve. That's the only way I can
>>do it since my preferred reader does not save posts. Least here I got
>>spell checking, and I don't care who does not see this post.
>I have not really seen a good "spot" out of a CFL. The spots
>they sell are almost all floods. The glass flat front types are the best.
>There is also that cold cathode type I forgot to mention.
I'm not sure why even bother with CFL's allthough I like the less
heat factor. My electric bill last month was $0.
greg
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> alt.energy.renewable, On Mon, 18 May 2009 13:22:26 -0700 (PDT),
> >wrote:
> >> That's right, buy a double pack of 11 or 20W CFLs for 48 pence and get
> >> two packs free at my local supermarket.
> >>
> >> Cost per CFL = 8 pence or say 12 c US
> >
> >Good, but not completely unbeatable. Dollar store pencils, twenty to
> >a package, can be made into carbon arc rods, and the resulting
> >arc lamp:
> >(1) is brighter,
> >(2) generates more ozone
> >(3) does more damage to local RF reception
> >(4) is cheaper to re-lamp
> >
> >than even the best CFL lamp.
> >
> >Seriously, the CFL retrofit to AC lamp sockets intended for
> >incandescent lighting, even though it's the darling of the
> >green set, is a stopgap solution. In the long run, disposable
> >lamp-plus-electronics isn't the best technology.
> A certain consumer guru (http://clarkhoward.com ) says CFL's are a
> stopgap and the Next Big "Green" Thing will be LED lamps which last
> NUCH longer (maybe they'll socket the electrolytics) and not have any
> mercury or other bad substance that escapes when breaking. Dunno if I
> believe LED's will take over, new things usually do go down in price
> and up in volume, eventually upsetting older technology, but it
> doesn't always work out that way.