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Waht does pulse start mean?
- Thread starter Canada
- Start date
C&P from the Lithonia page:
http://www.lithonia.com/Energy/EnergyCa ... efault.htm
What is Pulse Start?:
A change in the lamp and ballast construction allows pulse start metal halide lamps to start using a high voltage ignitor in the ballast instead of a starting electrode (probe) in the lamp. The result is a "white light" system that challenges high pressure sodium’s long lamp life, high lumen output and quick starts capabilities.
Benefits of Pulse Start HID Ballast/Lamp System!
Longer lamp life
Better lumen maintenance
Reduced color shift
Superior color rendition to HPS
Improved lamp-to-lamp color consistency
Faster warm-up time
Faster restrike time
Colder starting temperatures
Less arc tube blackening
Lamp:
Probe Start Lamp
A traditional or probe start metal halide lamp has an internal starting electrode or probe. A high open circuit voltage from the ballast initiates an arc between the two starting electrodes at one end of the arc tube. Once the lamp reaches full output, a bi-metal switch closes to short out the probe and discontinues the staring arc.
Pulse Start Lamp
A pulse start lamp has an improved arc tube design and an increased fill pressure. An ignitor in the pulse start system delivers a high voltage pulse directly across the lamp’s operating electrodes to start the lamp, eliminating the probe and bi-metal switch needed in probe start lamps.
Ballast:
CWA – Constant Wattage Autotransformer (lead-type regulator), the most widely used HID ballast today, offers good ballast regulation and moderate ballast losses. Available for probe start metal halide and high-pressure sodium lamps.
Pulse Start Ballast - The pulse start system uses a dedicated ballast that includes an ignitor. This eliminates the need for the starting probe and bi-metal switch in the lamp. There are three designs of pulse start ballasts, each has it’s own characteristics. As in all ballast designs, the ballast must match the electrical requirements of each specific lamp. The American National Standards Institute (ANSI) has applied specific identification codes to each pulse start system.
SCWA – Super Constant Wattage Autotransformer, the pulse start version of the CWA ballast, offers good ballast regulation and moderate ballast losses. For pulse start metal halide lamps only.
LLSCWA – Low Loss Super Constant Wattage Autotransformer, this ballast has all the benefits of an SCWA ballast, but with reduced energy consumption. For pulse start metal halide lamps only.
LLRPSL – Linear Reactor, designed as an energy savings system, 277-volt only, is used in areas with very little line voltage variation. Auxiliary quartz options are not available. For pulse start metal halide lamps only.
RLB – Regulated Lag Ballast (LAG-type regulator, "reg-lag"), exhibits the best ballast regulation, is used in areas where excellent line dip tolerance is critical. For pulse start metal halide lamps only.
http://www.lithonia.com/Energy/EnergyCa ... efault.htm
What is Pulse Start?:
A change in the lamp and ballast construction allows pulse start metal halide lamps to start using a high voltage ignitor in the ballast instead of a starting electrode (probe) in the lamp. The result is a "white light" system that challenges high pressure sodium’s long lamp life, high lumen output and quick starts capabilities.
Benefits of Pulse Start HID Ballast/Lamp System!
Longer lamp life
Better lumen maintenance
Reduced color shift
Superior color rendition to HPS
Improved lamp-to-lamp color consistency
Faster warm-up time
Faster restrike time
Colder starting temperatures
Less arc tube blackening
Lamp:
Probe Start Lamp
A traditional or probe start metal halide lamp has an internal starting electrode or probe. A high open circuit voltage from the ballast initiates an arc between the two starting electrodes at one end of the arc tube. Once the lamp reaches full output, a bi-metal switch closes to short out the probe and discontinues the staring arc.
Pulse Start Lamp
A pulse start lamp has an improved arc tube design and an increased fill pressure. An ignitor in the pulse start system delivers a high voltage pulse directly across the lamp’s operating electrodes to start the lamp, eliminating the probe and bi-metal switch needed in probe start lamps.
Ballast:
CWA – Constant Wattage Autotransformer (lead-type regulator), the most widely used HID ballast today, offers good ballast regulation and moderate ballast losses. Available for probe start metal halide and high-pressure sodium lamps.
Pulse Start Ballast - The pulse start system uses a dedicated ballast that includes an ignitor. This eliminates the need for the starting probe and bi-metal switch in the lamp. There are three designs of pulse start ballasts, each has it’s own characteristics. As in all ballast designs, the ballast must match the electrical requirements of each specific lamp. The American National Standards Institute (ANSI) has applied specific identification codes to each pulse start system.
SCWA – Super Constant Wattage Autotransformer, the pulse start version of the CWA ballast, offers good ballast regulation and moderate ballast losses. For pulse start metal halide lamps only.
LLSCWA – Low Loss Super Constant Wattage Autotransformer, this ballast has all the benefits of an SCWA ballast, but with reduced energy consumption. For pulse start metal halide lamps only.
LLRPSL – Linear Reactor, designed as an energy savings system, 277-volt only, is used in areas with very little line voltage variation. Auxiliary quartz options are not available. For pulse start metal halide lamps only.
RLB – Regulated Lag Ballast (LAG-type regulator, "reg-lag"), exhibits the best ballast regulation, is used in areas where excellent line dip tolerance is critical. For pulse start metal halide lamps only.
On a practical note, most european/german bulbs don't have starting probes and are designed for pulse start ballasts. So it's not a bad idea to go with a pulse start ballast.
Pulse-start ballasts have an ANSI designation of M13X, the X being a varaible number depending on the wattage. "Regular" probe-start ballasts have an ANSI designation of M5X.
Pulse-start ballasts have an ANSI designation of M13X, the X being a varaible number depending on the wattage. "Regular" probe-start ballasts have an ANSI designation of M5X.
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