HQI-R 150W / FO Fibre Optic Source

Compact metal halide lamps came onto the lighting market at around about the same time that fibre optic systems were being trialled as a future general lighting method.Prior to this time, fibre optics had only been employed in highly specialised applications, for example medical endoscopy and microscope illumination. Short arc reflector lamps were the preference in these most demanding of applications, but the price of such lamps was far too high and their lifetimes too short to be of any interest in the general lighting sector.

The first general lighting fibre optic systems were thus developed around the considerably cheaper tungsten halogen lamps. This limited how much light could be injected into the fibres, since many are fabricated in plastic materials, which would overheat with high power halogen lamps.

This lamp was therefore developed as the first relatively low cost discharge lamp for fibre optic applications, and it was hoped that its high power and cool beam would push forward the possibilities for fibre optics in general lighting. The light source here is in fact a standard HQI-T single ended arc tube with quartz outer jacket, the whole being cemented into a dichroic coated hard glass reflector.

The light is efficiently collected and focussed down to a small spot a few centimetres in front of the lamp while infrared passes through the reflector coating. Lamps are mounted in the optical system by the rim, which ensures good reproducibility in position after replacement. Electrical connections are made at the end of the flexible cables.
Manufacturer: Osram GmbH
Lamp Power: 150 Watts
Lamp Current: 1.80 Amps
Lamp Voltage: 95 Volts
Cap: Plug on flying leads
Bulb Finish: Dichroic cold light reflector
Bulb Type: MR-95 borosilicate
Overall Length: 92 mm
Electrodes: Forward wound tungsten without shank
Inner / Outer Atmosphere: Inner: Ar | Hg Outer: Vacuum
Beam Lumens 5200lm in 25mm aperture 1850lm in 10mm aperture
Luminous Flux: 11,500 @ 100 hrs
Luminous Efficacy: 73 lm/W @ 100 hrs
Colour Temperature & CRI: CCT: 4200K CRI: Ra=80
Chromaticity Co-ordinates: CCx: CCy:
Burning Position: Beam horizontal ±15°
Rated Life: 6000 hours
Warm Up / Re-strike Time: 3 minutes 5 minutes
Factory: Spandau, Berlin Germany
Date of Manufacture: March 1997 q738
Original / Present Value:
References: 1) Osram Lamp Catalogue 2005.