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GLS Arc

GLS Arc

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End of life arcing in a GLS lamp. This was produced artificially by firing a high voltage pulse across a burning lamp. The upward bow of the high current arc due to convection effects is clearly visible.

Incandescent_-_Photo_-_Sealed_Beam_-_Sylvania_DNF_Side.jpg Langmuir Sheath Demo.jpg GLS Arcing.jpg 3Waybulb2.jpg

Light Information

Light Information

Manufacturer:Sylvania
Lamp
Lamp Type:240/100 GLS
Filament/Radiator Type:CC-9
Base:B22d
Shape/Finish:PS-60

File information

File information

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Filename:GLS Arcing.jpg
Album name:James / Incandescent
Keywords:Lamps
File Size:31 KB
Date added:Nov 21, 2005
Dimensions:766 x 558 pixels
Displayed:702 times
URL:https://www.lighting-gallery.net/gallery/displayimage.php?pos=-2609
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Nov 21, 2005 at 04:28 PM Author:
Nice picture how high was the voltage that you sent through it
James
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Nov 21, 2005 at 04:55 PM Author: James
Just the ordinary 240V mains supply, with a kick start of around 750V to fuse the filament and start the arc.
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Jan 25, 2011 at 12:29 PM Author: TL8W
Amazing. Was arc continuous and did the glass envelope survive?

We do not have to agree on anything to be kind to one another. The ability to be civil is available to everyone on earth, for free.

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My idol is Mylene Farmer, deal with it.


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Apr 24, 2014 at 09:52 AM Author: vytautas_lamps
what is a GLS lamp? I live in Lithuania and I have NO clue what is a GLS lamp. please, explain me someone?

New lighting technologies is a pity fest everywhere you look. From LEDs that last only for two months, to a never-ending global starvation of t8 fluorescent tubes.
We shall reinforce ourselves with good old full mercury t12s and HIDs made to surpass one's life, and give them all the middle finger ;

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Apr 24, 2014 at 11:34 AM Author: dor123
GLS = General Lighting Service. Another name for incandescent lamps.

I"m don't speak English well, and rely on online translating to write in this site.
Please forgive me if my choice of my words looks like offensive, while that isn't my intention.

I only working with the European date format (dd.mm.yyyy).

I lives in Israel, which is a 230-240V, 50hz country.

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Apr 24, 2014 at 12:01 PM Author: Medved
It does not say directly incandescent, but really a lamp for the most common uses. But except last two decades, such lamp was over a century only an incandescent type.

No more selfballasted c***

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My idol is Mylene Farmer, deal with it.


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Apr 24, 2014 at 01:55 PM Author: vytautas_lamps
thank you all very much!

New lighting technologies is a pity fest everywhere you look. From LEDs that last only for two months, to a never-ending global starvation of t8 fluorescent tubes.
We shall reinforce ourselves with good old full mercury t12s and HIDs made to surpass one's life, and give them all the middle finger ;

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EYE H80 Mercury Vapour


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Apr 25, 2014 at 11:39 AM Author: BG101
Nice effect! I assume you were using a choke in series with this to provide the pulse and limit the current?


BG

Say NO to DICTATORSHIP in the form of bulb/tube/ballast bans !!

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Apr 25, 2014 at 11:53 AM Author: Medved
I would rather guess for a MOT, the arc can not hold at such low current with only mains voltage...

No more selfballasted c***

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Apr 25, 2014 at 12:34 PM Author: migette1
Good experiment James thanks!!!

Interested in the history of electric lighting and incandescent in particular and neon glow lamps.

James
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Apr 25, 2014 at 01:19 PM Author: James
If I remember rightly (it was a long time ago in 1996 when I took this photo!), it was done on the leakage reactance transformer for a 200W SLI/H lamp and a variac to turn down its open circuit voltage immediately after the arc struck. That was necessary to limit the current such that the fuses in the stem did not blow.
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Apr 25, 2014 at 01:24 PM Author: rjluna2
Hi James,

Did you ramp up the voltage via variac until the discharge struck, then you immediately turn it down? That must have a tricky shot here.

Pretty, please no more Chinese failure.

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Jan 14, 2019 at 10:09 PM Author: Globe Collector
How long did the arc burn for, James. On an SLI-H 200 Leak Transformer and Variac, I reckon you could get it to burn for a few seconds until the lead-ins melted back to the press.

I had wondered how you had done this picture. I should try this myself.

Would love to see a REAL E.O.L. arc with just the low source impedance of the mains behind it, catching in on camrea would be a real trick though.

There are two guys on You Tube..."The Slo-Mo-Guys"...they use super high speed cameras to catch all sorts of fleeting phenomena, but this is one they have not done.

I reckon, with "modern" N2/Ar filled lamps that there is more a chance of the arc shorting the lead-ins out when it is burned cap-up, that way the arc tends to bow up between the lead ins from the initial parting point of the filament ends and thus more likely to be drawn to them by the electric field and short them out.

Cap-Down the chance of arc-short-out is a lot lower, particularly if the filament parts somewhere "in the middle" so the arc has refactory tungsten to impinge on at each end. If the parting happens at one end, so the arc impinges on one lead-in, then melt-back of that lead-in in might lead to an arc-short or thermally shocked bulb.

Would love to see it all happen in ultra slo-mo!

Manufactured articles should be made to be used, not made to be sold!

Fee, Fye, Fow, Fum, A dead man's eye and a parrot's BUM!

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Jan 15, 2019 at 04:44 AM Author: migette1
This shows the shape of a real arc. Original the word was Arch as this was what was normally seen but was shortened to arc.....sorry just a bit of my useless information...LOL but its true goes back to Humphrey Davy.

Interested in the history of electric lighting and incandescent in particular and neon glow lamps.

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Jan 15, 2019 at 04:56 AM Author: Globe Collector
So Humphrey Davy called it an "Arch"...and over time the "h" got lost and it became "Arc", is that correct?

Manufactured articles should be made to be used, not made to be sold!

Fee, Fye, Fow, Fum, A dead man's eye and a parrot's BUM!

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Jan 15, 2019 at 05:16 AM Author: migette1

So Humphrey Davy called it an "Arch"...and over time the "h" got lost and it became "Arc", is that correct?



Yes that's right Andrew think I got the scientist right but think its in Wikipedia.

Interested in the history of electric lighting and incandescent in particular and neon glow lamps.

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Jan 15, 2019 at 05:21 AM Author: Globe Collector
Thanks, Interesting Story!

Manufactured articles should be made to be used, not made to be sold!

Fee, Fye, Fow, Fum, A dead man's eye and a parrot's BUM!

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in my house is not used led and if I can avoid it


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Jan 15, 2019 at 05:47 AM Author: Daniel f
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