%0 Conference Paper
%A Rudolph R Verderber
%A Oliver C Morse
%A Francis M Rubinstein
%B Annual IEEE-IAS Conference
%C Toronto, Canada
%D 1985
%G eng
%L LBL-19779
%T Effect of Filament Power Removal on a Fluorescent Lamp System
%1 <p>Lighting Systems Group</p>
%2 LBL-19779
%8 10/1985
%X <p>Two techniques are used to measure the effect of removing the filament power from a two-lamp, F-40, rapid-start fluorescent lamp system. The changes are measured for a standard CBM core-coil ballast and for a solid-state ballast operating the lamp at high frequency. There is a 4 to 6% increase in system efficacy when the filament power is removed. Removal of filament power also decreases filament temperature from 1000 °C below 700 °C in lamps operated at 60 Hz, and from above 600 °C to 300 °C in lamps operated at high frequency. The study shows that the arc current and anode fall also determine filament temperature.</p>