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Polychlorinated biphenyls, or PCBs, are a group of industrial chemicals that were widely used before 1979 as insulators in electrical equipment. Use and disposal of PCBs is federally regulated by the Environmental Protection Agency (EPA) under the Toxic Substances and Control Act (TSCA).
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The GE UltraMax ballast is different from other T8 ballasts, because of its built-in UL Type CC anti-arcing “Arc Guard” feature. The ballast has a Maintenance Mode operation that, by operation of the Arc Guard system, reduces the possibility of arcing at the lampholders or anywhere else in the lamp circuit.
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Power factor is defined as the ratio of real power in Watts to complex power in Volt-Amperes (VA). It is always a number between 0 and 1. Power factor is significant to power generating utilities because it is a measure of what they must generate in VA to what is actually consumed in Watts.
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T12 ballasts for 2-4ft 2-pin lamps are rapid start ballasts. They provide voltage to the lamp cathodes during starting that heats the cathodes prior to the ballast applying an open circuit voltage (OCV) to start the lamp. T12 ballasts for 4 through 8ft single pin lamps are instant start ballasts. They do not apply voltage to the cathodes during starting and therefore need to apply a higher OCV to the lamp in order to start the lamp.
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Electronic ballasts use power supply circuits that vary widely in frequency. Although they are not intentional radiators, lighting fixtures emit fields that can interact with other devices operating at the same frequency. The typical frequency of electronic ballasts may vary from 20 kHz to 100 kHz. This frequency range is a public domain and band widths are not licensed or managed by the FCC.
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GE analysis of internal and competitive HID lamps suggests that the most compatible driving waveform for an electronic ballast is a Low Frequency Square Wave (L.F.S.W.) with low higher order harmonic content. L.F.S.W. has been long established as a dependable method of ballasting low Wattage HID lamps with significant industry standards support, both U.S and international.
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The need to provide energy savings by operating metal halide lamps on dimming systems has typically resulted in less than desirable color performance with Quartz Metal Halide (QMH) lamps. This paper examines how the new CMH® lamp technology has significantly improved the lamp lumen maintenance, Color Rendering Index (CRI) and minimized color variability initially and throughout life for full wattage and reduced wattage operation.
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This document compares Quality-of-light characteristics such as lumen maintenance, lamp color-shift and spread, color rendering Index (CRI) and dimming capabilities of GE ConstantColor® CMH® Ceramic Metal Halide lamps with that of standard Quartz Metal Halide (QMH) lamps.
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This paper lists the operational guidelines to be followed when using dimming systems with GE HID lamps.
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