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Author Topic: Anyone use LTI xenons? Matt Hale Expert Film Handler Posts: 123 From: Vancouver, Canada Registered: Dec 2002 posted 02-03-2003 03:16 PM                        Its already removed, along with the lamphouse it was in. Unfortunatley I have none of the packaging or documentation or paperwork that came with it as the facility has changed hands at least 3 times over its life. I have no idea what its warranty period was. It is presently buried in about 8 inches of bubbble wrap and duct-taped into a double-thick cardboard box. Beyond that I'm not quite sure what to do with it. I will definitely be suggesting that we purchase all new bulbs for when we put this stuff back together - perhaps LTI? [subtle attempt to keep thread on-topic]  |  IP: Logged Brad Miller Administrator Posts: 17775 From: Plano, TX (36.2 miles NW of Rockwall) Registered: May 99 posted 02-03-2003 03:25 PM                     As has been stated a ton of times on the forums, you cannot beat the reliability, light and quantity of hours on a Christie/Ushio xenon bulb. Yes they are a little more expensive, but once you do the math it is easy to see that they are actually cheaper to operate.  |  IP: Logged Gordon McLeod Film God Posts: 9532 From: Toronto Ontario Canada Registered: Jun 99 posted 02-03-2003 06:02 PM                     Superior Quartz lamps are my recomendation  |  IP: Logged Dustin Mitchell Phenomenal Film Handler Posts: 1865 From: Mondovi, WI, USA Registered: Mar 2000 posted 02-03-2003 06:15 PM                     If you automaticaly change your lamps when they are 125% of warranty Christie or Osram are both acceptable. If you run your lamps until they begin to show signs of aging (envelope darkening or flicker) then if the choice is between Christie or Osram pick Christie. I can't speak for other brands unfortunately.  |  IP: Logged Peter Schoell Film Handler Posts: 47 From: Paynesville, MN, USA Registered: Jul 2001 posted 02-04-2003 10:22 PM                     I bought a 3 screen theatre a few years ago. When I opened the lamphouses all three had bulbs that were totaly black. Too black to see the anode and cathode. I had to keep using them for a few days, until new bulbs could be shipped. The old owner came for a movie one night and the manager mentioned we had changed the blubs. His reply. "Your supposed to change them?"  |  IP: Logged John Pytlak Film God Posts: 9987 From: Rochester, NY 14650-1922 Registered: Jan 2000 posted 02-05-2003 05:57 AM                        Peter Schoell wrote: quote: The old owner came for a movie one night and the manager mentioned we had changed the blubs. His reply. "Your supposed to change them? THX TAP and Kodak ScreenCheck surveys show most theatres do NOT have proper screen luminance: http://www.kodak.com/US/en/motion/newsletters/pytlak/spring98.shtml  |  IP: Logged Kenneth Wuepper Phenomenal Film Handler Posts: 1026 From: Saginaw, MI, USA Registered: Feb 2002 posted 02-05-2003 06:27 AM                     Gordon, What experience have you had with Superior? Number of lamps, etc.. We are running our first one here at the Court theatre and it was an immediate difference especially in the colors. We were running "Lilo and Stich" and the intensity of the colors was amazing. The original lamp was a P&E. I am especially impressed with their electrode supports as the focus remains constant throughout any rotation of the bulb. KEN  |  IP: Logged Dave Macaulay Film God Posts: 2321 From: Toronto, Canada Registered: Apr 2001 posted 02-05-2003 07:57 AM                     <quote> We are running our first one here at the Court theatre and it was an immediate difference especially in the colors. We were running "Lilo and Stich" and the intensity of the colors was amazing.</quote> Comparing a new "brand X" lamp to a new "brand Y" lamp in the same lamphouse? Otherwise the comparison is questionable - the worst case would be any new lamp compared to the end-of-life lamp just removed before the optics were cleaned...  |  IP: Logged Scott Norwood Film God Posts: 8146 From: Boston, MA. USA (1774.21 miles northeast of Dallas) Registered: Jun 99 posted 02-05-2003 08:00 AM                        John--have there been any surveys done since 1998 on screen brightness? Given all of the theater closures since that time (which seem to have mostly affected older multiplexes--i.e. the venues which are most likely to have illumination problems) and the fact that most newly constructed theatres seem to have adequate or more than adequate screen illumination, I would hope that the average screen illumination has improved significantly since then, although I am sure that it is still below standard.  |  IP: Logged John Pytlak Film God Posts: 9987 From: Rochester, NY 14650-1922 Registered: Jan 2000 posted 02-05-2003 08:25 AM                        While Ted Costas was still with THX, he had reported that average screen luminance had actually gone down even more since 1998. If I recall, the average was slightly over 10 footlamberts. Ted...? IMHO, the issue is the trend to some really large screens in some newer theatres (including the poor practice of trying to fill the full width of these huge screens with the less efficient 1.85:1 "flat" format), and a decline in maintenance when theatres had financial difficulties. Even here on Film-Tech, some take false pride in pushing lamps thousands of hours beyond their rated life, despite obvious blackening and electrode erosion.  |  IP: Logged Kenneth Wuepper Phenomenal Film Handler Posts: 1026 From: Saginaw, MI, USA Registered: Feb 2002 posted 02-05-2003 09:46 AM                     Dave, 200 hours VS new is not unreasonabe difference. Lamp optics cleaned before each new installation is SOP. Ken  |  IP: Logged Gordon McLeod Film God Posts: 9532 From: Toronto Ontario Canada Registered: Jun 99 posted 02-05-2003 01:14 PM                     Probably 1/4 of the theatres I deal with are using SPQ lamps 2000-4000 watts no complaints so far  |  IP: Logged Michael Rourke Expert Film Handler Posts: 159 From: San Luis Obispo, Central Coast of CA Registered: Feb 2002 posted 02-05-2003 06:35 PM                     Speaking of Superior Quartz, I tried a 3k in my Christie SLC lamphouse and with 1100 hours on it I checked the envelope and it had turned orange. That's a new one. I pulled an LTI today at 1300 hours because the envelope was darkening at the top. My Christies are performing very well, I have 2 that are over 1300 hours and have no envelope darkening at all. My bulbs don't go too far over warranty because of poor exhaust design, they were put in after all the other HVAC duct and none of the stacks are a straight shot, but back when I first started, our Osrams seemed like they went forever. If you can afford it, I recommend Osram bulbs , with Christie a close second , and ORC's are the bane of my existence  |  IP: Logged

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