IWASAKI LIGHTING - EYE Lighting International of North America, Inc.

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GLOSSARY
M
Mercury Lamp: A High Intensity Discharge (HID) lamp in which the major
portion of the light is produced by radiation from Mercury vapor operating
at a partial pressure in excess of an atmosphere. Includes clear, phosphor
coated and Self-Ballasted lamps.
Metal Halide Lamp: A High Intensity Discharge (HID) lamp in which the
major portion of light is produced by radiation of Metal Halides and their
products of dissociation in combination with metallic vapors such as
Mercury. Includes clear and phosphor coated lamps.
Mogul Base: A large Edison Screw Base whose diameter is approximately
1.5 inches.
MOL (Maximum Overall Length): The largest outside dimension of a
lamp. Typically MOL is measured from the end of the lamp base to the top
of the outer jacket.
Multi-Metal: Metal halide lamps including U-Line, X-Line, Super X-Line
and reduced jacket.
Multi-Metal Ace: Retro� t Metal Halide lamps that operate on High
Pressure Sodium ballasts. Converts High Pressure Sodium CRI 25 � xtures to
Metal Halide CRI 65 � xtures by changing the lamp.
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NEC (National Electric Code®): A collection of electrical wiring speci� cations
and standards developed by the National Fire Protection Association (NFPA),
and adopted and used in all 50 states in the USA. This standard is accredited
by ANSI and CSA.
Nominal Beam Angle: That beam angle which is established as being
representative of a manufacturer’s production.
Normal Power Factor: Ballast in which the power factor is less than 0.80
(80%). These ballasts require about twice the line current of high power
factor ballasts.
Open Circuit Voltage (OCV): Voltage, as measured at the lamp socket
(HID or CFL) or across the lamp holders (fl uorescent) when the lamp is not
present, generated by the ballast needed to start a lamp when power is
turned on.
Operating Position: The speci� c physical orientation in which lamps are
designed to operate. (for example, Base Up = BU, Base Up or Down=BUD,
Base Up to Horizontal=BUH, Base Down = BD, Horizontal = HOR, etc.)
O
P
Parallel Circuit: Ballast circuit in which the lamps connected to one ballast
operate independently of one another – if one lamp fails, the rest remain lit.
Peak Intensity (lp): The highest value of light � ux intensity regardless of
whether or not it occurs on the beam axis. The unit of measure of Peak
Intensity is the Candela.
Peak-Lead Ballast: A ballast that produces a highly peaked open circuit
voltage wave shape, and has a capacitor in series with the lamp. CWA and
CWI ballasts are typically Peak-lead ballasts.
Phosphor: Material lining the interior of a � uorescent lamp which emits
light.
Preheat Ballast: Electromagnetic ballast that requires separate starter in
order to ignite the lamp.
GLOSSARY OF TERMS
Preheat Lamp: A � uorescent lamp in which the � laments must be heated
before the lamp ignites.
Potting: Compound used to completely surround and cover components
of some magnetic and electronic ballasts in order to protect components,
dampen sound, and dissipate heat.
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Power Ace: Converts a Mercury or Metal Halide system to High Pressure
Sodium by simply changing the lamp. Meets Federal EPA TCLP requirements
for non-hazardous waste and saves energy.
Power Factor (PF): The ratio of real power (watts) to apparent power VA
(volts x amps). HID ballast power factor is classifi ed in two categories, High
(Pf ≥0.90), and Normal or Low, (Pf