William Sommerwerck wrote:


He didn't say where he got the 12th-power rule. Anybody know?

I don't know where it came from, or if it is accurate.
(I don't doubt or dispute it - I just don't know.)
But in 1978 I wired the 2 bulbs in the each of the EXIT
lights in the church in series. They were burning out in
3-4 months before that. Since I wired them in series, we
haven't had to replace a single bulb. The bulbs are lit
24x7, so they don't go through any on/off stress.

In wrote:

But in 1978 I wired the 2 bulbs in the each of the EXIT
lights in the church in series.

Congratulations, you probably bypassed a safety feature. If they're in
parallel, if one burns out the other keeps going. In series, if one
goes they're both out, and the exit sign is no longer visible.

nobody wrote:

In wrote:


But in 1978 I wired the 2 bulbs in the each of the EXIT
lights in the church in series.


Congratulations, you probably bypassed a safety feature. If they're in
parallel, if one burns out the other keeps going. In series, if one
goes they're both out, and the exit sign is no longer visible.

But if he'd have left them in parallel, they most certainly would have
both burned out long ago! :-p

Cheers,
Fred
--
+--------------------------------------------+
| Music: http://www3.telus.net/dogstarmusic/ |
| Projects: http://dogstar.dantimax.dk |
+--------------------------------------------+

A diode, ballast, or capacitor in series with each lamp would be
fairly good too. Ballast is best because it performs surge
suppression.

Stepan

On Tue, 02 Sep 2003 21:04:55 GMT, Fred Nachbaur
wrote:



nobody wrote:

In wrote:


But in 1978 I wired the 2 bulbs in the each of the EXIT
lights in the church in series.


Congratulations, you probably bypassed a safety feature. If they're in
parallel, if one burns out the other keeps going. In series, if one
goes they're both out, and the exit sign is no longer visible.

But if he'd have left them in parallel, they most certainly would have
both burned out long ago! :-p

Cheers,
Fred

In article , Stepan
Novotill wrote:

A diode, ballast, or capacitor in series with each lamp would be

That would have been the proper solution. There are these little
buttons you stick to the tip of the screw-base of the bulb.

You then screw this entire thing into the socket. It's called a "bulb
saver" and is essentially a tiny diode in series that chops the
voltage across the bulb in half.

I assume the bulb bases for these exit lights are much smaller than
Edison based household bulbs (intermediate base perhaps?) and the
bulb savers I've seen are only for Edison sockets.

I think some EXIT lamp manufacturers were also selling LED retrofit
kits for some of these lights.

Also, door slamming and vibration could have been a partial reason for
premature lamp failure.

But now we're getting WAAYYYYYY off topic here.

--
Sven Weil
New York City, U.S.A.

On Wed, 03 Sep 2003 02:28:32 GMT, the renowned (Sven
Franklyn Weil) wrote:

You then screw this entire thing into the socket. It's called a "bulb
saver" and is essentially a tiny diode in series that chops the
voltage across the bulb in half.
snip

The RMS voltage across the bulb is reduced by ~29%.

Best regards,
Spehro Pefhany
--
"it's the network..." "The Journey is the reward"
Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com

In article ,
mentioned...
On Wed, 03 Sep 2003 02:28:32 GMT, the renowned (Sven
Franklyn Weil) wrote:

You then screw this entire thing into the socket. It's called a "bulb
saver" and is essentially a tiny diode in series that chops the
voltage across the bulb in half.
snip

The RMS voltage across the bulb is reduced by ~29%.

Ooh, DejaVu, I think we've had this discussion before...

The bulb savers that I used back in the '70s were varistors. They
slowed down the turn-on of the light. They were low resistance when
warm, and high when cold. There was no diode.

Best regards,
Spehro Pefhany


--
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###Got a Question about ELECTRONICS? Check HERE First:###
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Don't be ripped off by the big book dealers. Go to the URL
that will give you a choice and save you money(up to half).
http://www.everybookstore.com You'll be glad you did!
Just when you thought you had all this figured out, the gov't
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@@t@h@e@@a@f@f@l@u@e@n@t@@m@e@e@t@@t@h@e@@E@f@f@l@ u@e@n@t@@

In article ,
mentioned...


nobody wrote:

In wrote:


But in 1978 I wired the 2 bulbs in the each of the EXIT
lights in the church in series.


Congratulations, you probably bypassed a safety feature. If they're in
parallel, if one burns out the other keeps going. In series, if one
goes they're both out, and the exit sign is no longer visible.

But if he'd have left them in parallel, they most certainly would have
both burned out long ago! :-p

Cheers,
Fred


I gotta tell you what happened at work last week. The head of
security came over and told us that someone had complained that one of
our tables was blocking the door (it's a temporary setup). The head
of registration told him that she put it there to keep the students
from leaving. The security guy says, but that's an emergency exit,
see that sign up there?

So she says, oh, ok. Well, then, can we move the sign?

:-)))


--
@@F@r@o@m@@O@r@a@n@g@e@@C@o@u@n@t@y@,@@C@a@l@,@@w@ h@e@r@e@@
###Got a Question about ELECTRONICS? Check HERE First:###
http://users.pandora.be/educypedia/e...s/databank.htm
My email address is whitelisted. *All* email sent to it
goes directly to the trash unless you add NOSPAM in the
Subject: line with other stuff. alondra101 at hotmail.com
Don't be ripped off by the big book dealers. Go to the URL
that will give you a choice and save you money(up to half).
http://www.everybookstore.com You'll be glad you did!
Just when you thought you had all this figured out, the gov't
changed it: http://physics.nist.gov/cuu/Units/binary.html
@@t@h@e@@a@f@f@l@u@e@n@t@@m@e@e@t@@t@h@e@@E@f@f@l@ u@e@n@t@@

On 3/9/03 20:27, in article ,
"Watt Sun Watson A.Name -" wrote:

I gotta tell you what happened at work last week. The head of
security came over and told us that someone had complained that one of
our tables was blocking the door (it's a temporary setup). The head
of registration told him that she put it there to keep the students
from leaving. The security guy says, but that's an emergency exit,
see that sign up there?

So she says, oh, ok. Well, then, can we move the sign?

Sounds like when I was going to Drexel - for 12 years!


--
Robert Morein.

Failed 50 year old loser student.
Failed Temple University
Ejected from Grad program after seven years
Ejected from Drexel University after dissertation judged "bull**** nonsense"
Sued Drexel and Lost
Even took it to the Supreme Court, but they laughed at me!
But I get even with studentsandthelaw.org my harassment site.
My poor jew mother Jane Morein died with a broken heart, watching this
poor twisted loser fail at everything I've ever done.
Daddy Sylvan Morein, who studied hard and became a fair to middlin' dentist,
is now stuck at home with his loser son; unwanted by life or any of the
relatives.
But I've discovered at last my calling: INTERNET WACKO!



Man, am I a Loser!

Watson A.Name - Watt Sun wrote:

In article ,
mentioned...


nobody wrote:


In wrote:



But in 1978 I wired the 2 bulbs in the each of the EXIT
lights in the church in series.


Congratulations, you probably bypassed a safety feature. If they're in
parallel, if one burns out the other keeps going. In series, if one
goes they're both out, and the exit sign is no longer visible.

But if he'd have left them in parallel, they most certainly would have
both burned out long ago! :-p

Cheers,
Fred



I gotta tell you what happened at work last week. The head of
security came over and told us that someone had complained that one of
our tables was blocking the door (it's a temporary setup). The head
of registration told him that she put it there to keep the students
from leaving. The security guy says, but that's an emergency exit,
see that sign up there?

So she says, oh, ok. Well, then, can we move the sign?

:-)))

LOL! But hey, makes sense to me. "If Mohammed won't go the the mountain,
the mountain will bloody well just have to come to Mohammed!"

Cheers,
Fred
--
+--------------------------------------------+
| Music: http://www3.telus.net/dogstarmusic/ |
| Projects: http://dogstar.dantimax.dk |
+--------------------------------------------+