PXA-80 Pulsed Xenon Arc Lamp

Pulsed Xenon Arc sources are employed principally within the Graphic Arts industry, being eminently suitable for the lighting of both horizontal and vertical copy boards. They are intended for use at normal AC mains frequencies and therefore pulse either 120 or 100 times per second. Since the lamps strike instantly and there is no delay in reaching full luminous flux, they are also suitable for use in stop-and-repeat document copying machines.

The lamps are based on a high power electric discharge taking place in an atmosphere of low pressure xenon. The spectral characteristics are a very close approximation to daylight, making them suitable for both colour and black-and-white reproduction work. Unlike short arc xenon lamps which are characterised by a continual degradation of luminous flux and a decreasing colour temperature as they age, due to electrode disintegration and the deposit of tungsten on the bulb wall, these long arc devices do not show such degradation. Their spectrum remains continuous and at full intensity throughout their entire useful life.

A quartz bulb is necessary to withstand the very high power dissipation, and although this is made from an ozone-free material, short wave ultraviolet is generated in quantity therefore adequate protection must be employed when these lamps are illuminated.

The original PXA lamps were created as long linear source of narrow diameter, this facilitating the design of slim and high efficiency reflector systems. Later models are often of the spiral type such as this example, to provide a compact source lamp for use in a conventional ellipsoidal reflector.

Manufacturer:	General Electric Co. of U.S.A.
Lamp Power:	8000 Watts
Lamp Current:	5.0 Amps
Lamp Voltage:	1600 Volts
Cap:	Ceramic	177.8mm flying leads
Bulb Finish:	Clear	Quartz
Bulb Type:	T-10.5, 60mm coil dia.	T-3 (in eighths/inch)
Overall Length:	118 mm
Cap Centre Spacings:	48 x 90mm
Electrodes:	Tungsten coil & shank
Atmosphere:	Xenon
Luminous Flux:	240,000 lm
Luminous Efficacy:	30 lm/W @ 100 hours
Colour Temperature & CRI:	CCT: 6000K	CRI:
Chromaticity Co-ordinates:	CCx:	CCy:
Burning Position	Universal
Rated Life:
Factory:	Bellevue, OH	U.S.A.
Date of Manufacture:	October 1990
Original Value:	GB £408.00 (2001)