Let's fire up some filaments! Enjoy!
My 1896 Edison Bulb - https://www.youtube.com/watch?v=jTsPQ9RGKt4
My 1900ish Shelby Bulb - https://www.youtube.com/watch?v=9m-ONh3C4kc
Join Team FranLab!!!! Become a patron and help support my YouTube Channel on Patreon: http://www.patreon.com/frantone
#franlab #bulb #vacuum
- Music by Fran Blanche -
Fran on Twitter - https://twitter.com/contourcorsets
Fran's Science Blog - http://www.frantone.com/designwritings/design_writings.html
FranArt Website - http://www.contourcorsets.com
My 1896 Edison Bulb - https://www.youtube.com/watch?v=jTsPQ9RGKt4
My 1900ish Shelby Bulb - https://www.youtube.com/watch?v=9m-ONh3C4kc
Join Team FranLab!!!! Become a patron and help support my YouTube Channel on Patreon: http://www.patreon.com/frantone
#franlab #bulb #vacuum
- Music by Fran Blanche -
Fran on Twitter - https://twitter.com/contourcorsets
Fran's Science Blog - http://www.frantone.com/designwritings/design_writings.html
FranArt Website - http://www.contourcorsets.com
I have an led bulb for 15y now. Still working
Wondering if the tungsten bulb you showed is banned along with most of the other E26 incandescents, or if they consider it exempt as a 'specialty' bulb? Anyway, I like the look, but it's crazy it lasts less than a year (major deal-breaker for me).
I think the Edison style LEDs make more sense for most people. They use way less energy and are supposed to last 10 years or more.
I have an antique lamp (was kerosene) that I use on a timer every evening. I put a diode in the socket, it dims down the bulb and it lasts for years. The bulb you're showing would be perfect for this lamp.
Tungsten is not a black body radiator (like carbon), that is why it is more yellow and not orange
the 1000 hours life is the perfect compromise between efficacy and life expectancy. Reducing the voltage extends the life, but it also reduces efficacy.
So is the coating of the carbon on the inside of carbon filiment bulb, graphene?
Back in the 70s before they moved it, the First Street fire house in Livermore where the old bulb was hanging was a pleasant place to burn a doobie and tip a beer and look at the bulb. I suppose I could have been the only person that was aware of that, but if there was a Pitch Drop experiment going on at a cool spot I could easily stare at one of those. Anyway I figured that the low lumens of that dim red bulb was a defective oversized filament and that was why it was maybe burning a little cooler than most. It was hanging about five from the ceiling so the wire absorbed vibrations from Earthquakes and whatnot. There is a plume of Tritium coming from one of the little reactors out there at Lawrence Lab that leaked for a week or so after one of those. Engineering is not easy for everyone.
If you operated that bulb at the yellow heat shown, 50V or so it would last practically forever, the gas fill in the lamp is low pressure argon and nitrogen and the temperature is low enough that sublimination of tungsten is negligible. There is one catch though, running too cool, about dim red heat, will cause the metal to become extremely brittle over time.
A number of years ago, "they" were selling doodads that would make an incandescent bulb a very long time. The doodads were round and thin like a Tums tablet and were put in the socket and the bulb would screw down like normal. It was a diode. The advertising for them never mentioned the resultant lesser light output.
All my LED’s are set at 50% power. Will last years more. Great video.
Oh yes, you tickle my mind. Thanks. Really interesting and great explaining
I wonder if a diode in series would be sufficient to reduce the brightness to a suitable level.
Run a diode in series that can handle 1 amp and 120 volts reverse voltage. I would never run this at full voltage. Get two and run them in series. Have Ron at Glasslinger make you some more bulbs. Very cool Fran, thanks for sharing!
What a bright idea! : – )
Hi Fran!
Neato!
I love the new Edison bulbs out there and the ones that are LED are super cool.