Magazine article American Cinematographer

New Ecolam Hard Glass-Type Halogen Lamps

Magazine article American Cinematographer

New Ecolam Hard Glass-Type Halogen Lamps

Article excerpt

A line of unique new lamps which, by substituting hard glass for costly quartz, offer all of the advantages of tungsten-halogen, but at the low cost of incandescent lamps

When tungsten-halogen lamps (or "quartzHodine", as they were originally called) were introduced some years ago, they were justly hailed as a most significant breakthrough in lighting for still and motion picture photography - so important, in fact, that the Academy of Motion Picture Arts and Sciences has twice presented Scientific/Technical awards to developers of this type of equipment.

The advantages of tungsten-halogen lighting are obvious: small units that put out a great amount of light, and a considerably longer effective lamp life, due to the fact that they retain intensity and color temperature on a consistent level right up to burn-out.

The one disadvantage of these lamps up to now has been cost. They are expensive - considerably more so than incandescent units of identical wattage. As it turns out, the main factor responsible for the sizable increase in price is the expensive quartz envelope that is required to manufacture a tungsten-halogen lamp.

Many have made the statement that it would be ideal to develop a lamp with all the plus characteristics of tungstenhalogen, but with a price tag more like that of an equivalent incandescent lamp.

That is exactly what Ryudensha Co. Ltd. of Japan has done in designing and manufacturing its new ECOLAM Hard Glass Halogen lamps, introduced at Photokina '74.

The RDS ECOLAM is a revolutionary new alternative for stage or studio illumination, skillfully combining the advantages of halogen and ordinary incandescent lamps. The ECOLAM halogen-filled lamp is not constructed of quartz, as are conventional tungstenhalogen lamps. Instead, a highly purified hard glass (borosilicate) is utilized. The result: compact size (onehalf that of incandescent types), constant color temperature, and extraordinarily long life. …

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