Metal halide lamp apparatus

A metal halide lamp apparatus comprises a reflector (9) and a metal halide lamp which is without an outer bulb and which has a reflecting/thermal insulating film (5) and a frosted portion (6) which is partially formed on the lamp outer surface within a predetermined range continued from the reflecti...

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Bibliographische Detailangaben
Hauptverfasser:	MASEKI, KYOICHI, KUROSAWA, KAZUTOSHI, URUSHIHARA, AKIRA
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	BASIC ELECTRIC ELEMENTS BLASTING ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS ELECTRICITY FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMSTHEREOF HEATING LIGHTING MECHANICAL ENGINEERING STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHERARTICLES, NOT OTHERWISE PROVIDED FOR WEAPONS
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Beschreibung
Zusammenfassung:	A metal halide lamp apparatus comprises a reflector (9) and a metal halide lamp which is without an outer bulb and which has a reflecting/thermal insulating film (5) and a frosted portion (6) which is partially formed on the lamp outer surface within a predetermined range continued from the reflecting/ thermal insulating film (5). This causes a reduction in an overall illuminance decrease and the attainment of a desired illuminance ratio and prevents the occurrence of irregularity in illuminance and colour. In addition, since electrodes (2a,2b) are asymmetrically disposed, it is possible to decrease the rate of devitrification of the luminous tube and make an attempt to increase the life of the luminous tube.