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Author Topic: power chart for xenon bulbs????? Dan Lyons Jedi Master Film Handler Posts: 698 From: Seal Beach, CA Registered: Sep 2002 posted 05-08-2004 01:04 PM                     Is there such a thing? I need to know what range of amps to run my Osram XBO 700w/hs at; the box doesn't tell me. I've been running at 29 amps, not sure if that's too low. danny  |  IP: Logged Darryl Spicer Film God Posts: 3250 From: Lexington, KY, USA Registered: Dec 2000 posted 05-08-2004 01:17 PM                    its volts X amps = wattage 24DCV X 29AMPS = 696 Watts If your DCV is running to low the 29 amps when multiplied with that number will not add up to the desired wattage of the bulb.  |  IP: Logged Dan Lyons Jedi Master Film Handler Posts: 698 From: Seal Beach, CA Registered: Sep 2002 posted 05-08-2004 01:33 PM                     nifty formula, thanks! danny  |  IP: Logged Gordon McLeod Film God Posts: 9532 From: Toronto Ontario Canada Registered: Jun 99 posted 05-08-2004 01:44 PM                     actaually it is va not watts. wattage is a unit of power and volts x amps would be true for DC but not ac for ac it is volts x amps x powerfactor this becomes an issue with reactive loads such as motors  |  IP: Logged Gordon Bachlund Jedi Master Film Handler Posts: 696 From: Monrovia, CA, USA Registered: Aug 1999 posted 05-08-2004 02:51 PM                        Dan, welcome to the wonderful world of Ohm's Law, DC and AC equipment and machinery, single- and poly-phase circuits, and similar high power intellectual pursuits.  |  IP: Logged Adam Martin I'm not even gonna point out the irony. Posts: 3686 From: Dallas, TX Registered: Nov 2000 posted 05-08-2004 05:19 PM                     According to this document from Osram, the lamp should operate optimally at 18 volts and 37 amps (range of 30-45 amps).  |  IP: Logged Phil Hill I love my cootie bug Posts: 7595 From: Hollywood, CA USA Registered: Mar 2000 posted 05-09-2004 03:41 PM                  Actually Gord M, since in a dc circuit the pf=1, watts would still be correct. >>> Phil  |  IP: Logged Gordon McLeod Film God Posts: 9532 From: Toronto Ontario Canada Registered: Jun 99 posted 05-09-2004 03:51 PM                     exactly the formula still has PF in it just in the case of DC it is 1 but an important factor to remember in AC issues especially around motors and transformers  |  IP: Logged Phil Hill I love my cootie bug Posts: 7595 From: Hollywood, CA USA Registered: Mar 2000 posted 05-09-2004 04:08 PM                  You're right McGord, I *ALWAYS* think about power factor whenever I walk by a motor or transformer...or even a capacitor. Am I over "reactance-ing"? Sorry, I don't have more "resistance" to such a lame pun. >>> Phil  |  IP: Logged

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