Performance of electronic ballasts and lighting controllers with 34-W fluorescent lamps: Final report
This study has measured the performance of energy-saving 34-watt F40, T-12, rapid-start, lite white fluorescent lamps being operated by solid-state ballasts and lighting control equipment. The performances of these lamps are compared with those of 40-watt F40, T-12 rapid-start cool white fluorescent lamp systems studied in the prior phase of this project. With the 34-watt F40 lamps and various solid-state ballasts, system efficacy ranged from 67 to 84 lumens per watt and ballast factor from 0.756 to 0.908. Average system efficacy using the 34-watt lamps exceeded that of systems using 40-watt lamps and the same solid-state ballasts by only 1 percent even though the 34-watt lamps is about 6 percent more efficacious than the 40-watt lamp. This apparent discrepancy is due to increased ballast losses when operating the 34-watt lamps. However, the system efficacy of the 34-watt lamps used with a solid-state ballast exceeded that of a 34-watt, two-lamp system using the standard core-coil ballast by as much as 29 percent. A T-8 fluorescent lamp system with a smaller lamp diameter was also included in the study. Operating this lamp with a solid-state ballast produced a high system efficacy of 90 lumens per watt, a 39 percent improvement over the efficacy of a 40-watt F40 system using the standard core-coil ballast. The use of static controllers with 34-watt F40 lamps can result in excessive flickering (46 percent) and the generation of a second harmonic as high as 96 percent of the fundamental frequency. The dynamic controllers, when used to dim the 34-watt lamps generally cannot be dimmed as low as the 40-watt lamp system without flickering. In general, the 34-watt energy-saving lamps are appropriate as a retrofit to reduce illumination levels. However, for new construction, the 40-watt F40 argon filled lamps cost less, perform better, and provide a more reliable system. 5 refs., 27 figs., 9 tabs.
- Research Organization:
- Electric Power Research Inst., Palo Alto, CA (USA); Lawrence Berkeley Lab., CA (USA)
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 7225321
- Report Number(s):
- EPRI-EM-5888; ON: DE88012290
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
320106* -- Energy Conservation
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& Utilization-- Building Equipment-- (1987-)
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420800 -- Engineering-- Electronic Circuits & Devices-- (-1989)
BALLASTS
CONTROL EQUIPMENT
DATA
EFFICIENCY
ELECTRIC CONTROLLERS
ENERGY CONSERVATION
ENERGY EFFICIENCY
ENERGY MANAGEMENT
ENERGY SYSTEMS
EQUIPMENT
FLUORESCENT LAMPS
INFORMATION
LIGHT BULBS
LIGHTING SYSTEMS
MANAGEMENT
NUMERICAL DATA
PERFORMANCE TESTING
PLANNING
TESTING