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Metalarc 100W Halide

Metalarc 100W Halide

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This hot lamp shows the internal one legged device glowing while failing to strike. The lamp was running with an electronic ballast. I just wondered, if instead of a starting aid, it is to suppress internal voltage stress.

MAv250.jpg LUCALOX_400.jpg metalarc.jpg son_400.jpg

Light Information

Light Information

Manufacturer:Sylvania
Lamp
Lamp Type:Halide
Electrical
Wattage:100

File information

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Filename:metalarc.jpg
Album name:tuopeek / High Pressure Lamps
Keywords:Lamps
File Size:71 KB
Date added:Dec 06, 2015
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Date Time:2015:12:06 17:27:39
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Solanaceae
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Dec 06, 2015 at 05:14 PM Author: Solanaceae
It's an ultraviolet light source which helps starting the arc.

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tuopeek 111967450636623837217 tuopeek1 77334065@N05/
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Dec 06, 2015 at 05:30 PM Author: tuopeek
Interesting, I remember working with an old difficult to start mercury lamp that would fire up if I put the fluorescent lights on in the room. Good old Photo-electric effect.
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Dec 06, 2015 at 06:16 PM Author: Globe Collector
I recently discovered, (with the help of a borrowed Ocean Optics Spectrophotometer) that the deep purple afterglow seen in some High Pressure Sodium Lamp arc tubes (and similar in appearance to the glow in the arc tube of this lamp) is actually a very intense 330nm U.V. glow and all we see is the "tail of the bell curve" above 400nm.

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

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Dec 06, 2015 at 09:08 PM Author: ManofHID
Interesting! Can definitley see the purple of the UV from it!

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Dec 07, 2015 at 01:14 AM Author: dor123
I've seen this glow in the Osram NAV-TS Excellence 150W/NDL of my hostel on an Eltam magnetic ballast and either Eltam or another crappy superimposd ignitor, and my Sylvania HSI-TD 70W/D UVS Rx7s on a Philips Primavision electronic ballast (Ignites the lamp continuously), during their hot restrike. The Osram lamp, have this glow after about two mins, then it settle in an intermediate arc for about 6 mins, before reaching to full discharge. My Sylvania lamp shows this glow and the main discharge intermittently like in this video .
Btw tuopeek: Which brand of electronic ballast u used to operate this lamp here?

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 hope that LED won't replace all forms of other light

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tuopeek 111967450636623837217 tuopeek1 77334065@N05/
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Dec 07, 2015 at 04:40 AM Author: tuopeek
I was using a Philips electronic ballast too.

Very interesting about the after glow on HPS arc tube. I can feel some experiments needing to be done.
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Dec 07, 2015 at 05:12 AM Author: dor123
If the afterglow of the ceramic arctube after a brief turning on, would peak in the visible light, it would be much brighter.

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 hope that LED won't replace all forms of other light

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Dec 07, 2015 at 05:40 AM Author: Globe Collector
Dor, yes that's the same conclusion I came to immediately after seeing the bell shaped peak from the spectrophotomter, "geez this would be QUITE BRIGHT if we could see it all"!

Tuopeek, I was thinking of laying the arc tube in question, (it has been removed from the lamp) onto or near a Yttrium Orthovanadate screen, (made from YtVO4 taken from old mercury lamps) or simply a piece of A4 office paper with luminol in it, these should be excited by the 330nm phosphorescence and make it MUCH MORE visible.
Fluorscein, (that orange by transmission but green by fluorescence dye plumbers use to locate pipe leaks) is another interesting compound which fluoresces under this UVA part of the spectrum. I thought of giving the arc tube a brief flash by possibly discharging a capacitor through it, then quickly dropping it into a jar of fluorescein solution.

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

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Dec 07, 2015 at 06:09 AM Author: tuopeek
My thinking too. I have various things that will fluoresce to try beside an inner tube. A quick pulse from a hv powersupply may be a bit safer than a capacitor but I guess it may glow brighter with some current behind it.
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Dec 07, 2015 at 06:26 AM Author: rjluna2
Nice Argon glow on the main arc tube and the enhancer glow bottle

Pretty, please no more Chinese failure.

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Dec 07, 2015 at 07:03 AM Author: dor123
The corona discharge takes place mainly on mercury, as it is still too hot to be taken place in the starting gas. The mercury may produces different color and spectra during the corona discharge, cold cathode discharge and hot cathode discharge.
I don't think that the gas inside the UV enhancer, is argon, as it produce mainly in the short-wave UV and argon glow discharge produces mainly in the long wave UV.

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 hope that LED won't replace all forms of other light

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Dec 07, 2015 at 08:55 AM Author: dor123
I did analysed the spectrum of the corona discharge of my Sylvania HSI-TD 70W/D, during its hot restrike, with my CD-R. The emission was mainly mercury lines, but the blue mercury line was strong, while the green and the yellow doublet were barely visible.

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 hope that LED won't replace all forms of other light

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tuopeek 111967450636623837217 tuopeek1 77334065@N05/
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Dec 07, 2015 at 01:19 PM Author: tuopeek
I found it difficult to get enough light to see the spectrum from the starter so could not guess the internal gas.
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Dec 07, 2015 at 01:30 PM Author: dor123
I meaned the corona inside the arctube.

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 hope that LED won't replace all forms of other light

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Dec 07, 2015 at 08:59 PM Author: Globe Collector
Many of the "Inert Gasses" in Group VIII on the periodic table from diatomic molecules....BUT, there is a catch, it does not happen if the two atoms are in the neutral or ground state....one, or possibly both, atoms must be in a particular excited state for the diatomic species to appear (their orbitals are antibonding in the ground state but become bonding in the excited state.)
These molecular species are not very long lived and soon de-excite (and decompose back to the atomic state) with the emission of a broad molecular band. They are called "Excited-Dimers" or "Eximers". Each...Xe2*, Kr2*, Ar2* radiate in the mid to far U.V. with a broad peak about 30nm wide. The Xe2* peak centeres at 171nm, the lighter gasses emit at even shorter wavelengths and higher energies.
Probably the best known eximer lamp is the Duterium Lamp.

I reckon this "starter" is some sort of capacitively coupled or localized field activated eximer lamp.

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 26, 2018 at 06:16 AM Author: dor123
I've done an hot restrike experiment with my Osram HQI-TS 70W/WDL Excellence in my tracklight and a troll doll with a fluorescent orange hair, to see if the glow discharge inside the arctube (Which produces mainly in the UV) can causes it to fluorescence. The hair of the troll doll, didn't fluorescence, but slightly burned from the heat of the lamp and the floodlight reflector.
Video will follow.

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 hope that LED won't replace all forms of other light

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