JPS5318274A - High pressure sodium lamp - Google Patents

High pressure sodium lamp

Info

Publication number
JPS5318274A
JPS5318274A JP9136276A JP9136276A JPS5318274A JP S5318274 A JPS5318274 A JP S5318274A JP 9136276 A JP9136276 A JP 9136276A JP 9136276 A JP9136276 A JP 9136276A JP S5318274 A JPS5318274 A JP S5318274A
Authority
JP
Japan
Prior art keywords
high pressure
pressure sodium
sodium lamp
illuminating
coolest point
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP9136276A
Other languages
Japanese (ja)
Inventor
Kenichi Kawasumi
Taisuke Hirota
Taku Sakai
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP9136276A priority Critical patent/JPS5318274A/en
Publication of JPS5318274A publication Critical patent/JPS5318274A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To maintain a temperature of a coolest point of an illuminating tube and to provide an illuminating light source with a high illuminating efficiency, providing a circuit for controlling the temperature of the coolest point of a surroundings of the coolest point of the illuminating tube in addition to a resistance ballast of a high pressure sodium lamp.
COPYRIGHT: (C)1978,JPO&Japio
JP9136276A 1976-08-02 1976-08-02 High pressure sodium lamp Pending JPS5318274A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9136276A JPS5318274A (en) 1976-08-02 1976-08-02 High pressure sodium lamp

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9136276A JPS5318274A (en) 1976-08-02 1976-08-02 High pressure sodium lamp

Publications (1)

Publication Number Publication Date
JPS5318274A true JPS5318274A (en) 1978-02-20

Family

ID=14024259

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9136276A Pending JPS5318274A (en) 1976-08-02 1976-08-02 High pressure sodium lamp

Country Status (1)

Country Link
JP (1) JPS5318274A (en)

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