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I would add that some sites that use ETC Sensor Dimming will set the output regulation to 115V or so and then use 120V lamps. (A little less bright but longer lamp life) To answer your question directly: In a perfect world, 2 lamps with only a difference in voltage rating will give the same performance...
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Hi - This might be as much socket related as lamp base related. The old TP22 - the Source Four socket for the last 200 years - will wear out eventually and not do a great job holding the lamp in the PAR socket. In the last 2-3 years, we have gone to using either a Bender & Worth socket or a new Sylvania...
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My S4, year 4/1999, was build for the 575W HPL lamps ( the new HPL 750W came out around year 2000). Does someone know if it is possible to use the newer HPL 750 lamps on this elder S4 model that is certainlynot so different from to the newer ones with the HPL 750W lamps. Many thanks for any reply! GE...