my profile | my password | search | faq & rules | forum home

» Film-Tech Forum ARCHIVE   » Operations   » Film Handlers' Forum   » Efficienty of Xenon lamps

Author Topic: Efficienty of Xenon lamps Marin Zorica Jedi Master Film Handler Posts: 671 From: Biograd na Moru, Croatia Registered: May 2003 posted 08-15-2006 12:54 PM                     In mine neighborhood theatres using pretty much vertical lamps, often they are XBO1600/ofr and XBO2500/ofr by Osram. I'm wonder if we put 1600W lamp rated at 70A, and put 2500W lamp rated at same current, as it same condition in lamp house do 2500W lamp get more light at same current or more? Also where some current vs. light output chart can be found for Osram lamps? Because I've search on net and manuals and I can't find it. I'm asking this because in some places lamps are 1600W so I considering to put 2500W (because rectifier gonna hold as they good for 100A) because screen light isn't that good. Considering theatre with 8 meter width screen and 30 meters throw with 1600W vertical lamp?  |  IP: Logged Monte L Fullmer Film God Posts: 8367 From: Nampa, Idaho, USA Registered: Nov 2004 posted 08-15-2006 01:58 PM                     I would. Not going to hurt as long as the rectifier can handle the larger bulb. But, you have to make certain that a strong exhaust flow is available since you're almost doubling the size of the bulb in the lamphouse. With a 2.5Kw bulb going in, average amperage will be 80 to 90 amps for running a 2.5kw bulb at 75 amps will be too low for the size of the bulb and your efficency and life of the bulb will decrease.  |  IP: Logged Gordon McLeod Film God Posts: 9532 From: Toronto Ontario Canada Registered: Jun 99 posted 08-15-2006 02:10 PM                     Also check the lamphouse is designed for the larger lamp so that the internal wireing and ignitor can support the higher current Also the length of the lamps are different so can the holder be adjusted  |  IP: Logged Marin Zorica Jedi Master Film Handler Posts: 671 From: Biograd na Moru, Croatia Registered: May 2003 posted 08-15-2006 04:49 PM                     Yes, I'm aware of all things considering going from 1,6KW to 2,5KW. Lamp house is OK for 2,5KW because is same like is used in 1,6KW only lamp holders must be stretched because 2,5KW lamp is bigger.  |  IP: Logged Bruce Hansen Jedi Master Film Handler Posts: 847 From: Stone Mountain, GA, USA Registered: Dec 1999 posted 08-17-2006 05:22 PM                     The voltage across the 2.5K lamp may be higher than the 1.6K lamp. P=I*E; Power (watts) = current (amps) X volts. 21.3V X 75A = 1600W, 33.3V X 75A = 2500W.  |  IP: Logged

All times are Central (GMT -6:00)

Printer-friendly view of this topic

Hop To: Select a Forum: Category: Operations -------------------- Digital Cinema Forum Film Handlers' Forum Large Format Forum Ground Level Feature Info, Trailer Attachments & REAL Credit Offsets Category: Community -------------------- Film-Yak Film Handlers' Movie Reviews The Afterlife Bob Maar's Joke-A-Thon Category: Classified -------------------- Equipment and Supplies Wanted/For Sale Help Wanted/Seeking Employment Category: System -------------------- Software Beta Testing Forum

The Film-Tech Forums are designed for various members related to the cinema industry to express their opinions, viewpoints and testimonials on various products, services and events based upon speculation, personal knowledge and factual information through use, therefore all views represented here allow no liability upon the publishers of this web site and the owners of said views assume no liability for any ill will resulting from these postings. The posts made here are for educational as well as entertainment purposes and as such anyone viewing this portion of the website must accept these views as statements of the author of that opinion and agrees to release the authors from any and all liability.