Talk:Xenon arc lamp

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Edit conflicts

I accidentally removed Atlant's clarification edit explicitly labeling the anode / cathode in the photo. I tried to put it back in but it looks like we were both editing the page at the same time!

Thanks for letting me know. As you could see by my edit summary, I was wondering what happened. ;-)

Atlant 18:48, 6 March 2006 (UTC)[reply]

Stubs for further Development (moved out of article)

Stub: Supply Design

Stub: Series Injection Igniter

Stub: Typical Circuit

About the Intro

Shouldn't the section titled "Introduction" either be moved to the Introduction or be renamed? Patiwat 11:24, 2 November 2006 (UTC)[reply]

I retitled that section -- how's it look now?

Atlant 13:42, 2 November 2006 (UTC)[reply]

Sentence is garbled

The first phrase of the following sentence needs editing:"An O-ring seals of the tube, so that the naked electrodes do not get into contact with the water." I do not know what the author intends here; so, I will not attemps an edit.

It's been fixed...I was gonna do it but someone beat me to it.

Under-counter lighting

I recently purchased some xenon under-counter lighting. Reading the article here, it appears this is not what I purchased. Or maybe it is? Can someone explain? Maury 02:05, 1 December 2007 (UTC)[reply]

While I'm here... There's a sentence in the History section that I find really confusing... The white, continuous light generated with this arc is of daylight quality but plagued by a rather low efficiency in terms of lumens of visible light output per watt of input power Ok, what is this referring to? The sentence immediately before this is talking about carbon arcs. but this is an article about xenon arcs, so "this arc" could refer to either. Can someone fix? Maury 02:11, 1 December 2007 (UTC)[reply]

Perhaps you got some halogen lights? Not really similar, but those are often under the counter lights. KeepOnTruckin ^{Complain to me | my work here} 03:34, 2 December 2007 (UTC)[reply]

Maybe, but I doubt it. They look like little florescent lamps about 1/2 inch long, and the packaging stated they were a florescent-type system. Maury 14:00, 2 December 2007 (UTC)[reply]

Your under-counter lights are xenon-filled tubes, but they are not arc discharge lamps. They are outside the scope of this article. jhawkinson 18:00, 2 December 2007 (UTC)[reply]

Soooo, in what article are they within scope? Maury (talk) 23:07, 7 December 2007 (UTC)[reply]

It sounds like you have some really interesting counter lights there Maury!

It is unlikely the lamps are xenon arc-lamps or even contain xenon gas. Xenon has the rather annoying property of only efficiently producing light at extremely high current densities. That's why xenon arc lamps have to be run at such high current levels, and why the discharge space is so small. 15,000 watts drive power into a volume the size of a marble!

Many manufacturers have started using "xenon" to describe any lamp which emits a blue-white or "icy white" spectrum. The lamps in your counter light fixtures are most likely made of fused quartz, with a tungsten filament, and pressurized with halogen gas. They may have a coating on the lamp envelopes to filter the light and give it a blue tint. Search for "Quartz Halogen" or "Tungsten Halogen"

It is also possible, but less likely due to cost, that your lights use Compact Fluorescent technology. They would take the form of small "tubes" as you describe, but each fixture would need to include a miniature power supply for the lamp.

If you're feeling keen, disassemble one of the fixtures, take some photos, post them to the commons, and link them to the talk page. We can take a look at them and identify what you have.

HyperLight

Pressure

The article notes several times that the xenon is under pressure (a lot of pressure). How much pressure is typical?

Also, I don't see an explanation for exactly why high pressure is required for this application or at least practically beneficial, except that it is for "maximum efficiency". Does that mean to get the most visible light vs UV/IR? Or the most light vs heat? Or…? How relevant are spectral emission line-broadening effects? Would be good to state more specifically and in lay terms what the utility of it is here. DMacks (talk) 00:14, 31 January 2008 (UTC)[reply]

Film projection "advantageous"?

I don't think most film students would agree that xenon lamps "advantageously" replaced the older carbon arc lamps for theatrical projection. Quite the contrary, xenon projectors usually are considerably less bright than the old arc lamps, resulting in a conspicuously inferior image on the screen. This is especially true of classic Technicolor films. As time passes, of course, there are fewer and fewer people who remember the quality of carbon arc projection.