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Author Topic: Storing Xenon Bulbs Aaron Mehocic Jedi Master Film Handler Posts: 804 From: New Castle, PA, USA Registered: Jun 99 posted 10-01-2000 10:16 PM                     Just a quick question: Does it matter if a xenon bulb is stored in a vertical or horizontal position for long periods of time inside a locked cabinet? In other words, can devitrification occur faster if the bulb is in one stored position over another position? Thanks for your input, Aaron  |  IP: Logged Steve Guttag We forgot the crackers Gromit!!! Posts: 12814 From: Annapolis, MD Registered: Dec 1999 posted 10-01-2000 10:52 PM                     It is wise to store larger lamps vertically with the postivie end down but I don't have the stats... If you get Christie xenon lamps they will have an arrow as to which end is up for storage. STeve ------------------ "Old projectionists never die, they just changeover!"  |  IP: Logged John Walsh Film God Posts: 2490 From: Connecticut, USA, Earth, Milky Way Registered: Oct 1999 posted 10-02-2000 04:45 PM                     Storing them vertically is what we do, too. The reason (I heard) is the heavy tungsten piece inside might bend down over time. What is (de)vitrification with a xenon bulb? My dictionary says: "vitrify: to change into glass or into a glassy substance by heat and fusion."  |  IP: Logged Gordon McLeod Film God Posts: 9532 From: Toronto Ontario Canada Registered: Jun 99 posted 10-02-2000 05:18 PM                     It is the breakdown of the quartz to glass seal  |  IP: Logged Randy Stankey Film God Posts: 6539 From: Erie, Pennsylvania Registered: Jun 99 posted 10-02-2000 07:25 PM                     Xenon bulbs are installed into lamphouses either horizontally or with the large electrode up and it doesn't hurt them. If you look on the Christie box, it says that the arrow goes up for shipping.  |  IP: Logged Richard Hamilton Phenomenal Film Handler Posts: 1341 From: Evansville, Indiana Registered: Jan 2000 posted 10-02-2000 07:35 PM                     If you go by the arrows on the outside of the box, that means you can't take the bulb out and inspect it when you receive it.  |  IP: Logged John Pytlak Film God Posts: 9987 From: Rochester, NY 14650-1922 Registered: Jan 2000 posted 10-03-2000 11:37 AM                        I doubt that "electrode sag" is much of an issue with storage of cold xenon lamps. Horizontal lamps are rotated to even out any blackening of the bulb, and to overcome the slight "sag" over time of the hot electrodes. The arrows on lamp cases probably indicate the optimum direction to minimize the risk of lamp breakage during shipping, if the case is accidently dropped. I prefer storing individual cased lamps on their side, only because if stored vertically, the cases could more easily tip over and fall out of the cabinet. ------------------ John P. Pytlak, Senior Technical Specialist Worldwide Technical Services, Entertainment Imaging Eastman Kodak Company Research Labs, Building 69, Room 7419 Rochester, New York, 14650-1922 USA Tel: 716-477-5325 Fax: 716-722-7243 E-Mail: john.pytlak@kodak.com  |  IP: Logged

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