The Luxor Las Vegas Spotlight « on: October 03, 2020, 09:05:02 AM » Author: CEB1993
Hi all, I’ve always been interested in the brightest spotlight in the world, the spotlight in the top of the Luxor Las Vegas hotel. According to Wikipedia, is uses 39 individual xenon lamps and mirrors to create a tight, intense beam of light. This lighting installation was created in 1993 and apparently has not gone LED or utilized any other more energy efficient lighting technologies. Anyone have any other information on this amazing lighting sight? Are the xenon lamps used here the super high pressure xenon arc lamps often found in projectors? Any information is welcome and I’m excited to learn more
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	Re: The Luxor Las Vegas Spotlight « Reply #1 on: October 03, 2020, 11:47:12 AM » Author: dor123
This is a searchlight. All searchlights uses short-arc xenon.
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	Re: The Luxor Las Vegas Spotlight « Reply #2 on: October 03, 2020, 06:30:40 PM » Author: Medved
The Xenon short arc are the brightest (non laser) light source known, so for a very focused high intensity beam use it offers very high optical efficiency, so much the seemingly inefficient Xe discharge becomes the most efficient light source for this use. This is the reason the otherwise extremely problematic Xe short arc technology (safety, combination of 50+kV ignition voltage with 30V operating voltage making the ballast ridiculously complicated,...) were ever put into service.
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	Re: The Luxor Las Vegas Spotlight « Reply #4 on: October 04, 2020, 01:56:47 AM » Author: Medved
Quote from: tolivac on October 04, 2020, 01:18:00 AM ...xenon bulb gives way!-sometimes happens-often during a show. I bet it is within the the vey first few minutes the given projector is turned ON - extra stresses due to not exactly even warmup...
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	Re: The Luxor Las Vegas Spotlight « Reply #6 on: October 04, 2020, 12:11:14 PM » Author: wide-lite 1000
Video  :  https://www.youtube.com/watch?v=xBekDJIZFJw
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	Re: The Luxor Las Vegas Spotlight « Reply #8 on: October 05, 2020, 05:12:45 AM » Author: dor123
Why the xenon lamps in the Luxor searchlight flashing before staying on (I've seen this a lot with short-arc xenon lamps videos)?
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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 international date format (dd.mm.yyyy).

I lives in Israel, which is a 220-240V, 50hz country.

	Re: The Luxor Las Vegas Spotlight « Reply #9 on: October 05, 2020, 10:10:44 AM » Author: Medved
It takes few attempts for the ballast to ignite and stabilize the arc, in the meantime it uses to be unstable so flashing. Only once the cathode warms up, the arc becomes stable and so the flashing ceases.
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	Re: The Luxor Las Vegas Spotlight « Reply #10 on: October 05, 2020, 08:01:13 PM » Author: wide-lite 1000
Quote from: dor123 on October 05, 2020, 05:12:45 AM Why the xenon lamps in the Luxor searchlight flashing before staying on (I've seen this a lot with short-arc xenon lamps videos)?  At 2:27 in the video you can see banks of strobe lights in red housings . I believe that's the flashing in this case .
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	Re: The Luxor Las Vegas Spotlight « Reply #11 on: October 06, 2020, 05:56:06 PM » Author: Silverliner
I saw the Luxor Las Vegas and its spotlight in the flesh from a trip there two years ago. Suspected it was a xenon short arc lamp. I got a pic of it somewhere.
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	Re: The Luxor Las Vegas Spotlight « Reply #12 on: October 06, 2020, 09:51:33 PM » Author: dor123
It is strange that the ballast sends the HV pulses to the lamp slowly like low frequency pulse HPS ignitor, and not at HF like most HID ignitors. HF pulses means faster cathode warm up and better ionization.
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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 international date format (dd.mm.yyyy).

I lives in Israel, which is a 220-240V, 50hz country.

	Re: The Luxor Las Vegas Spotlight « Reply #13 on: October 07, 2020, 02:10:52 AM » Author: Lumex120
I have always wondered what would happen if you were standing on top of it when the lights were turned on. Aside from obvious eye damage I'd imagine those things are intense enough to start fires up close.
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	Re: The Luxor Las Vegas Spotlight « Reply #14 on: October 07, 2020, 02:32:40 AM » Author: Medved
Quote from: dor123 on October 06, 2020, 09:51:33 PM It is strange that the ballast sends the HV pulses to the lamp slowly like low frequency pulse HPS ignitor, and not at HF like most HID ignitors. HF pulses means faster cathode warm up and better ionization. It has to generate 50..80 kV, quite a few meters from the lamp (for thermal reasons). Becomes quite a problem on larger diostance and the high current wiring...
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