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

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Series Circuit: Ballast circuit in which the lamps connected to one ballast
operate as a group. If one lamp fails or is removed, then all lamps in the
circuit turn o� .
Series-Parallel Circuit: Ballast circuit in which the lamps connected to one
ballast operate both as a group and independently. If one lamp fails or is
removed in the series connected section, then all lamps in that section will
turn o� , but the lamps in the parallel circuit remain on.
Shroud: The quartz enclosure around the arc tube designed to prevent
bulb breakage of the outer jacket if the arc tube ruptures. Shrouded lamps
are typically used in place of an enclosed � xture.
SI Unit: The International System of Units universally abbreviated SI (from
the French Le Systeme d’Unites).
Soft Glass: Soft Glass or soda lime glass is easily melted and formed with
relatively low melting temperatures as compared to heat resistant glass.
Soft glass lamps may fracture when water hits a hot bulb.
Specialux: Medium wattage mogul base High Pressure Sodium lamps
with high CRI that produce a warm color light similar to incandescent.
Spectrum: A linear representation of the di� erent radiant electromagnet
wavelengths ranging from cosmic rays to radio waves.
Standard Universal: Basic Metal Halide in all commonly used wattages.
Steridian: The steridian is the solid angle which, having its vertex in the
center of a sphere, cuts o� an area of the sphere equal to that of a square
with sides of equal length equal to the radius of the sphere.
SUNLUX®: Basic High Pressure Sodium in all commonly used wattages.
SUNLUX® ES/EN: Energy-saving High Pressure Sodium designs. EPA, TCLP
compliant for non-hazardous waste.
Sunlux Power Ace EN: Converts a Mercury or Metal Halide system to
High Pressure Sodium by simply changing the lamp. Is TCLP compliant for
non-hazardous waste and saves energy.
Sunlux Super Ace®: High lumen output High Pressure Sodium lamp that
converts a Mercury or Metal Halide system to High Pressure Sodium by simply
changing the lamp.
Sunlux Ultra Ace EN: 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.
System E� cacy: Overall effi ciency of the lamp/ballast system. System
effi cacy = total lamp lumens / system wattage.
GLOSSARY OF TERMS
T12, T10, T8, T5: Industry standard naming for a fl uorescent lamp. (T =
Tubular and the numbers that follow represent the diameter in 1/8 inch
increments).
Thermal Protector: A self resetting switch that disconnects power to the
ballast if internal temperatures rise above the trip point – typically 105°C.
Third Harmonic: Third multiple of the fundamental frequency that will
add in the neutral wire of a three phase, 4 wire, Wye system and will cause
overheating of the neutral wire should it exceed 33 1/3%.
Call: 888-665-2677 • Fax: 800-811-7395 • e-mail: sales@eyelighting.com • web: www.eyelighting.com
T
Transients: High voltage and resultant high current surges through an
electrical system caused by lightning strikes to nearby transformers, overhead
lines or the ground. May also be caused by switching of large motors
or other electrical loads, as well as by short circuits or utility system switching.
Can lead to premature failure of ballasts or other electrical devices.
UL (Underwriters Laboratories): Underwriters Laboratories Inc. is
an independent, not-for-profit product safety testing and certification
organization. UL has tested products for public safety for more than a
century.
U
UV (Ultraviolet): Radiant energy within the wavelengths of 100-400nm. UV
energy is classifi ed by IEC in three categories: UVA - 315 to 400 nm (“Black
Light”), UVB - 280 to 315 nm (Bacterial Sterilization) and UVC - 100 to 280 nm
(Ozone Producing).
Universal Operating Base Position: Lamps that can be installed and
operated in any position. The letter U commonly designates universal
position operating lamps.
W
Warm Up Time: The time from the initial establishment of an arc to 90% of
the steady state full light output of the lamp.
Watt (W): A unit of power used to quantify the rate of doing work. In
electrical calculations, one watt is the power produced by a current of 1
ampere across a potential di� erence of one volt. In addition, the radiant
luminous � ux of a lamp is also expressed in watts.
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GLOSSARY
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