Halarc MXR 32-Watt Compact Metal Halide

The 32W Halarc lamp was developed by GE in an attempt to bring discharge lighting indoors, as an energy-efficient alternative to incandescent lamps.

The arc tube was in fact developed as part of the Electronic Halarc project, in which a small metal halide light source was combined with a tungsten ballast filament, and electronic ignitor in the base, intended as a direct retrofit for GLS lamps. GE launched that product on the American market in 1981, but it was not a success and was quickly withdrawn. The very high sale price and technical complexity was a problem, especially in view of the fact that the Europeans developed, at the same time, the first self-ballasted compact fluorescent lamps. CFLs offered longer lifetime, better colour, higher efficacy, instant re-strike and all for a much lower cost. GE was thus forced to abandon the Electronic Halarc project. It was an unfortunate ending to a technically ambitious and otherwise successful project.

However to avoid wasting the tremendous amount of work that went into developing the low wattage arc tube, it was decided to market that alone, without the integrated ballast. The result is the lamp shown here. It was intended for use in professional applications to replace 100W incandescent lamps in ceiling downlighters, with only a remote ballast being required. To make the lamp suitable for open fixtures, a small quartz shroud is employed, affixed by a pair of molybdenum wires fused into the quartz. Unfortunately in the USA market where energy-efficiency was not an issue at the time, the lamp enjoyed little success. Following the USA's later energy crisis, the considerably more efficient 35W ceramic types became the general preference.
Manufacturer: General Electric Co. of U.S.A.
Lamp Power: 32 Watts
Lamp Current: 0.36 Amps DC Only
Lamp Voltage: 90 Volts DC Only
Cap: E27s/27 Ni Plated + Vitrite
Bulb Finish: Eu:YVO4 phosphor Leaded Borosilicate
Bulb Type: E-54 E-17 (in eighths/inch)
Overall Length: 136 mm 5 3/8 inches
Light Centre Length: 87 mm 3 7/16 inches
Electrodes: Anode : Tungsten bead Cathode : Tungsten wire
Atmosphere: Inner : Argon Outer : Vacuum
Luminous Flux: 2,500 lm @ 100 hours 1,823 lm @ 4000 hours
Luminous Efficacy: 78.1 lm/W @ 100 hours 57.0 lm/W @ 4000 hours
Colour Temperature & CRI: CCT: 3000K CRI: Ra 70
Chromaticity Co-ordinates: CCx: 0.437 CCy: 0.397
Burning Position Vertical cap up ±15°
Rated Life: 10,000 hours to 50% survival
Factory: Ravenna, Ohio U.S.A.
Date of Manufacture: October 1990
Original / Present Value: 57.25 (1991) 74.31 (2001)
References: 1) GE Lamp Catalogue, USA, 1989, p.70
2) GE Lamp Specification Bulletin 6371-121MV (April 1990).
3) GE-Tungsram UK Price List, 1991.