GE SHOWBIZ - Manual (Page 46)

GE LIGHTING - SHOWBIZ™ ENTERTAINMENT LIGHTING CATALOGUE 86
CP Range of Lamps for Fresnel and Spotlight Fittings
As the result of extensive and sustained development work, much of it original, GE are able to offer a
comprehensive range of lamps of quartz construction, operating on the tungsten halogen principle for
all Television Studio, ‘motion picture’, and Theatre lighting purposes.
GE has been strongly supported by the television and film industries in its decision to discontinue glass
lamps for studio lighting purposes. This is because the industry has appreciated the financial
advantages of quartz halogen lamps, their reliability and virtually constant colour temperature.
The increase in the use of the lamps we now manufacture is due to the GE policy of exploiting the
important advantages of compact size offered by quartz halogen construction.
As a result GE are able to supply quartz halogen lamps for use in Fresnel and spotlight fittings from 300
watts to 24,000 watts. These lamps employ a wide range of commonly accepted bases. This gives
fittings manufacturers a comprehensive range of compact lamps and permits the construction of
smaller, lighter and more efficient luminaires.
GE LIGHTING - SHOWBIZ™ ENTERTAINMENT LIGHTING CATALOGUE 87
Glossary of basic product information
Rated Average Life
Average life ratings of Projection Lamps are based on closely controlled laboratory tests of
lamps, at their rated voltage, over a long period of production time. Rated Average Life is not
necessarily the same as service life; mechanical shock and vibration, voltage fluctuation,
temperature and other environmental factors may result in shorter service life. As with any
average value, some individual lamps may operate longer, and some may operate shorter,
than their Rated Average Life. (Supply voltage variation can significantly affect lamp life; see
comments under Lamp Life Ratings, page 107).
‘T’ Class Lamps for Theatre Spotlight Fittings
With this group of lamps GE are continuing their policy of developing quartz halogen
lamps.These lamps operate at a lower colour temperature than the CP range. An average life
of a remarkable 750 hours is achieved for most of the GE range. Similar cost savings to those
offered by quartz halogen CP lamps are now presented by the quartz halogen ‘T’ range.