Toni Vucic Posted February 10, 2020 Share Posted February 10, 2020 Hi everyone! I was reading about line loss in Harry Box's Set Lighting Technician's Handbook when I noticed this: "a light operates at full efficiency only at its rated voltage. Operating at 108V (90% of its rated power), the 2k in fact produces only about 68% of its normal light output." But there was no data to back this up, so I was wondering how tungsten output scales with voltage drop. The loss in wattage (see attached picture) only brings us down to 79% power consumed. Couldn't find Harry's email either to ask. Hope you can help me! Best, Toni Link to comment Share on other sites More sharing options...
Ed Conley Posted February 10, 2020 Share Posted February 10, 2020 (edited) The data is in the formula. Edit- I see what you are saying now. Edited February 10, 2020 by Ed Conley Link to comment Share on other sites More sharing options...
Ed Conley Posted February 10, 2020 Share Posted February 10, 2020 I assume when he mentions Light Output he has switched to lumens terminology because the last paragraph starts with "The problem is compounded..." a change in voltage changes the Lumens but not linear Link to comment Share on other sites More sharing options...
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