Two techniques are used to measure the effects 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 tp 6% increase in system efficacy when the filament power is removed. Removal of filament power also decreases filament temperature from 1000C to below 700C in lamps operated at 60 Hz, and from above 600C to 300C in lamps operated at high frequency. The study shows that the arc current and anode fall also determine filament temperature.
NASA STI/Recon Technical Report N
- Pub Date:
- July 1985
- Solid State;
- Electronics and Electrical Engineering