ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
ShoutChat Box
Recent Posts
120/208 gives 240? please clarify
by JoeTestingEngr - 07/12/20 10:05 AM
Ceiling Fan Capacitor Question
by libellis - 07/11/20 01:45 PM
Questioning the electrical norms
by gfretwell - 07/09/20 04:35 PM
Blo breaker
by Admin - 07/07/20 02:42 PM
"Electric furnaces" and other odd American heaters
by gfretwell - 07/05/20 12:37 PM
New in the Gallery:
Facebook follies, bad wiring
FPE in Germany pt.2
Who's Online Now
1 registered members (JoeTestingEngr), 17 guests, and 10 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
Page 2 of 2 1 2
Re: 100 year old Light Bulb #151661 06/12/01 09:14 PM
Joined: Jun 2001
Posts: 5
Kilokat7 Offline
Junior Member
Originally posted by sparky66wv:
[B]Go to This Page about a 100 year old bulb that has burned more or less continuously since 1901...

Hello everyone,

Although I'm not in the electrical field I do have a strong interest in researching electrical lighting history. I heard my site mentioned above so I thought I'd jump in here. I agree with the reasons mentioned above about how and why this bulb has lasted this long. So instead of eating up more space I'll just pass a link on that you may be interested in. It seems this bulb has it's very own website and quite a fan club if you read the guestbook [Linked Image]

Regards from

Tim Tromp
Tools for Electricians:
Re: 100 year old Light Bulb #151662 06/12/01 10:16 PM
Joined: Oct 2000
Posts: 3,959
Bill Addiss Offline

Thanks for stopping by and sharing that with us. My Compliments on your interesting content and resource links. I put your site on my "Must Read" list as soon as I saw it. I hope that you'll come back and share with us again!


[Linked Image]

Re: 100 year old Light Bulb #151663 06/13/01 08:17 PM
Joined: Oct 2000
Posts: 5,389
sparky Offline
well this is something!

there is a bulb with it's own web site !
not a bulb manufacturer,
but a singular bulb!

[Linked Image]

Re: 100 year old Light Bulb #151664 06/13/01 09:55 PM
Joined: Nov 2000
Posts: 123
doc Offline
ok i'm going back 30 years or so here but i can remember a salesman coming along and selling my folks these little round green ceramic like pieces that went in the light fixture and then u screwed the bulb in.These gizmos were to make the lights burn for like ten to fifteen years or something like that they may have had to buy some special bulbs from ythis guy also i'm not sure,but some of the lights did last a long time and thinking back it seems the lights were kinda dim anyone remember these

Re: 100 year old Light Bulb #151665 06/14/01 01:13 AM
Joined: Nov 2000
Posts: 2,236
sparky66wv Offline OP

I remember these disc shaped things that rectified the power to DC and claimed longer life for bulbs. They were about 3mm thick and were sized for an Edison base, the ones I remember were blue, if that matters...

I think it was Popular Mechanics that I saw them in...

Residential/Commercial Inspector
5 Star Inspections
Member IAEI
Re: 100 year old Light Bulb #151666 06/14/01 01:04 PM
Joined: Dec 2000
Posts: 127
gpowellpec Offline
The disc shaped things were diodes. The cut off one half of the sine wave. You were getting half the power so the bulbs would be dimmer, create less heat and last longer. Also there was less amplitude in the vibration of the filiament, which also aided in longevity.

Re: 100 year old Light Bulb #151667 06/15/01 07:09 PM
Joined: Oct 2000
Posts: 3,959
Bill Addiss Offline
I've been in communication with members of the Livermore Heritage Guild and hopefully some more technical information will be coming.

So far the persons I've corresponded with are not aware of any special power source, only that a backup has existed for many years.

I forgot to say the filament is different.... I have heard both Carbon and Carbide used. It looks like it is quite heavy when the light is on... actually it is quite fine.


Re: 100 year old Light Bulb [Re: sparky66wv] #220207 08/17/19 11:44 AM
Joined: Oct 2000
Posts: 3,959
Bill Addiss Offline
I wouldn't normally raise a thread this old, but apparently this Bulb is still going strong after 118 years!

[Linked Image from]

[Linked Image from]

[Linked Image from]

You can see larger images Here:

more info:


Re: 100 year old Light Bulb [Re: sparky66wv] #220218 08/20/19 01:26 PM
Joined: Apr 2002
Posts: 7,181
HotLine1 Offline
OK, a old thread reseructed!! Darn, I saw names of members that have not been around in a while! Guess I should start looking at the dates of the posts.....smiley sad face....

Page 2 of 2 1 2


2020 National Electrical Code
2020 National Electrical
Code (NEC)

* * * * * * *

2017 Master Electrician Exam Preparation Combos
2017 NEC Electrician
Exam Prep Combos:
Master / Journeyman


Member Spotlight
Bakersfield, CA (Originally Orange Co.)
Posts: 1,432
Joined: February 2004
Show All Member Profiles 
Top Posters(30 Days)
Admin 8
Popular Topics(Views)
267,348 Are you busy
201,999 Re: Forum
190,598 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.7.3