||The ColorArc line of metal halide lamps from Iwasaki exhibit the highest colour rendering properties of any commercially-available discharge lamp. With a CRI of 96 throughout the entire range, even at low colour temperatures, the quality of light they deliver is second to none. Optimised control of the chemical corrosion reactions occurring during life also mean that colour is kept within +/- 300K during life, almost as good as from ceramic metal halide products.
ColorArc lamps were introduced in the E27 tubular format and then a PAR38 reflector envelope followed, with dichroic coating to project forward a cool beam of light. Where an aluminium reflector is acceptable the lamp size has been reduced to the much more compact PAR36 style represented here. By mounting the arc tube horizontally in the shallow reflector, a very tight beam can be produced. The arc tube is surrounded by the usual heavy-walled quartz shroud to give the lamp its open fixture status.
Iwasaki is able to make a lamp as compact as this because it fuses the glass reflector and front lens together at the rim, making a gas-tight seal. The outer bulb is then evacuated and the bare arc tube can then run satisfactorily in the reflector. Western lamps use glued-on front lenses and because the seal is not vacuum tight, the arc tube has to be enclosed in its own outer jacket, which takes up space and requires a much deeper reflector.
In addition to the usual range of colour temperatures, the reflector lamps are offered in 'Mediterranean Blue' and 'Enhanced Fresh Pink' colours for special lighting effects in a wide variety of retail applications.