Mazda Metal Halide MAIH 1000W TP 220V

The French manufacturer Compagnie des Lampes was one of the early pioneers in the development of metal halide lamps, but only ever made high power versions of 400W to 2000W. Metal halide technology becomes progressively more difficult to master at lower powers, and the company sourced in such products from Philips, with whom it had a technical affiliation for many years.

The Mazda MAI-series employs the same chemistry as GE's original metal halides, being dosed with the iodides of sodium, indium and thallium plus lithium as an impurity from the quartz. The influence from Philips is evidenced by the unusual neon-argon filled arc tubes, and neon-nitrogen filled outer envelopes, which facilitates ignition at lower voltages. Owing to the high thermal conductivity of neon, the arc tube is unusually small for its power rating. Sodium loss by the photoelectric effect is reduced by another Philips concept, using a steatite tube around the arc tube support frame.

This particular lamp is an unusual design unique to CdL. Whereas most manufacturers have a rather large aspect ratio for their 1000W arc tubes, CdL simply departed from its 2000W 380V arc tube and reduced the length to lower lamp voltage while operating at similar current. This has the advantage of allowing universal burning, but presumably at the expense of reduced lifetime. The arc tube has been fabricated from three pieces of quartz, and the outer bulb employs a zirconium-aluminium hydrogen getter. The cap is of a high quality design with porcelain insulator to better withstand the high ignition voltages. Following Philips' 1982 takeover of CdL-Mazda, this unusual lamp was phased out and replaced by the 1000W HPI-T long arc version.
Manufacturer: Compagnie des Lampes
Lamp Power: 1000 Watts
Lamp Current: 8.1 Amps
Lamp Voltage: 135 Volts
Cap Type: E40s/45 Ni plated brass + porcelain
Bulb Type: ED-120 ED-37 in eighths/inch
Bulb Finish: Clear borosilicate glass
Electrodes: Backwound coil Thoriated tungsten
Arc Length:
Atmosphere: (NaInTl)Ix, Hg | NeAr Outer: Nitrogen-Neon
Luminous Flux: 84,000 lm @ 100h
Luminous Efficacy: 84.0 lm/W @ 100h
Colour Temperature & CRI: 4000-4800K Ra 56-68
Chromaticity Co-ordinates: CCx: CCy:
Rated Lifetime: 10,000 hours to 50% survival
Warm-up & Re-strike Time:
Burning Position: Universal
Overall Length: 290 mm 117/16 inches
Light Centre Length:
Factory: Chalon-sur-SaƓne France
Date of Manufacture: March 1979 Date Code: 9C
Original Value: Unknown
 
References: 1) Compagnie des Lampes Mazda Catalogue, France, 1982 pp.128-129