The end of incandescent bulbs?

[Bill Bowden]

On May 3, 5:46 pm, "k...@att.bizzzzzzzzzzzz" <k...@att.bizzzzzzzzzzzz>
wrote:

On Thu, 03 May 2012 11:54:37 -0700, John Larkin

jlar...@highlandtechnology.com> wrote:
On Wed, 02 May 2012 16:04:17 -0400, dh@. wrote:

I heard that all incandescent bulbs will quit being produced and illegal to sell
in 2013. Is that true? I've also heard that some bulbs like the Par 38 outdoor
spots and floods might continue to be available. Is that true? Someone said they
thought pretty much all halogen bulbs will still be available... Can someone
there tell me what the truth actually is? What about entertainment bulbs, like
Par 64s and 56s, and aircraft landing lights...???

We just bought 500 each of 100, 75, and 60 watt bulbs. Maybe we should
buy more.


I have 100 100s and >200 60s.  That's stock for home use.

I saw some 71 watt incandescents for sale. They were energy saver
types, but I didn't buy any. Where do they come up with a number like
71 watts?

-Bill

 

[krw@att.bizzzzzzzzzzzz]

On Sat, 5 May 2012 18:06:29 -0700 (PDT), Bill Bowden
<bperryb@bowdenshobbycircuits.info> wrote:

On May 3, 5:46 pm, "k...@att.bizzzzzzzzzzzz" <k...@att.bizzzzzzzzzzzz
wrote:
On Thu, 03 May 2012 11:54:37 -0700, John Larkin

jlar...@highlandtechnology.com> wrote:
On Wed, 02 May 2012 16:04:17 -0400, dh@. wrote:

I heard that all incandescent bulbs will quit being produced and illegal to sell
in 2013. Is that true? I've also heard that some bulbs like the Par 38 outdoor
spots and floods might continue to be available. Is that true? Someone said they
thought pretty much all halogen bulbs will still be available... Can someone
there tell me what the truth actually is? What about entertainment bulbs, like
Par 64s and 56s, and aircraft landing lights...???

We just bought 500 each of 100, 75, and 60 watt bulbs. Maybe we should
buy more.


I have 100 100s and >200 60s.  That's stock for home use.

I saw some 71 watt incandescents for sale. They were energy saver
types, but I didn't buy any. Where do they come up with a number like
71 watts?

I've seen odd numbers like that with heavy service bulbs, and the like.
Basically, they have a heavier filament...

 

[William Sommerwerck]

I saw some 71 watt incandescents for sale. They were
energy-saver types, but I didn't buy any. Where do they
come up with a number like 71 watts?

There are such things as 75W bulbs, so replacing one with a 71W bulb will
save you 100Wh every 25 hours of operation. If the bulb is on all the time,
you'd save about $3.50 in electricity a year.

I've seen odd numbers like that with heavy service bulbs,
and the like. Basically, they have a heavier filament.

Actually, for a given light output (notice the qualification!!!), heavy-duty
bulbs (like the 130V bulbs installed in hard-to-get-to places, such as
garage-door openers) waste energy. The lower the temperature of the
filament, the less visible light is produced. (This is covered in just about
any physics book.) But the bulb lasts longer, as the life of an incandescent
bulb varies as the 12th power (!!!) of the applied voltage.

This is why tungsten-halogen bulbs produce more light than regular
incandescents. The bulb can run hotter, because the halogen cycle (which

requires<< the higher temperature) returns evaporated tungsten to the
filament.

The catch is that you have to leave the bulb on for a while for this to
occur -- you can't be constantly turning it on and off. And if you use a
dimmer, you can't dim the bulb "just a bit", because you'll halt the halogen
cycle, without meaningfully lowering the filament's temperature. (I've seen
this.) To paraphrase Pope... "A >>little<< dimming is a dangerous thing. Dim
>>deep<<, or enter not the power-saving stream."

 

[Ian Field]

"Bill Bowden" <bperryb@bowdenshobbycircuits.info> wrote in message
news:b9cf73f3-b065-4982-b9ad-01b125c1d304@sm6g2000pbc.googlegroups.com...
On May 3, 5:46 pm, "k...@att.bizzzzzzzzzzzz" <k...@att.bizzzzzzzzzzzz>
wrote:

On Thu, 03 May 2012 11:54:37 -0700, John Larkin

jlar...@highlandtechnology.com> wrote:
On Wed, 02 May 2012 16:04:17 -0400, dh@. wrote:

I heard that all incandescent bulbs will quit being produced and illegal
to sell
in 2013. Is that true? I've also heard that some bulbs like the Par 38
outdoor
spots and floods might continue to be available. Is that true? Someone
said they
thought pretty much all halogen bulbs will still be available... Can
someone
there tell me what the truth actually is? What about entertainment
bulbs, like
Par 64s and 56s, and aircraft landing lights...???

We just bought 500 each of 100, 75, and 60 watt bulbs. Maybe we should
buy more.


I have 100 100s and >200 60s. That's stock for home use.

I saw some 71 watt incandescents for sale. They were energy saver
types, but I didn't buy any. Where do they come up with a number like
71 watts?

-Bill
vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv

Maybe they were manufactured to a specification other than wattage rating -
and that's what they ended up as.

 

[Madness]

You can get 101 watt bulbs
http://www.servicelighting.com/Sylvania-13305-101A23-6M-120V-A23-Standard-Incandescent-Light-Bulb

cheers

I'd assume those would be classified as "specialty" bulbs. The MBTA
transit system in Boston used to use those "Street Railway" bulbs long
before all the fluorescent & HID lighting. There were made by Sylvania
(GTE) & also came in 56, 151 & 201 watts. Think I still have a few NIB
one's around from the 80s.