NDLI: A Metal Halide Lamp that Provides Unique Lightiig System Brightness and Uniformity Opportunities

Content Provider	IEEE Xplore Digital Library
Author	Beth Gotti, Mary Paugh, Ronald L.
Copyright Year	1972
Abstract	Typically, metal halide lamps exhibit a substantial loss in efricacy and reduction in life when operated horizontally. A novel lamp design is described that permits transverse mounting of the optimal arc tube design within an outer bulb. Combined with a prefocusing type mogul base, this lamp operates the arc tube vertically while the outer bulb is horizontal. Thus the high lamp efficacy, long life, and better lumen output maintenance throughout life previously only available in the vertical burning lamp is available in the horizontal burning type. From an application viewpoint, a lighting fixture designed to utilize a horizontal burning lamp intrudes less into the plenum area. Particularly in a new multifloor construction, a reduction in plenum height can reduce initial cost. In addition to possible reduced cost, this horizontal burning lamp controls the direction in which light is emitted from the lamp that can result in lighting distributions from typical luminaires that provide better lighting uniformity and a reduction in luminaire luminance when compared with typical lamps having the arc tube parallel to the lamp axis. This improved system performance has applications in both indoor and outdoor lighting systems in existing and new lighting luminaires.
Sponsorship	IEEE Industry Applications Society
Starting Page	1085
Ending Page	1088
Page Count	4
File Size	4515400
File Format	PDF
ISSN	00939994
Volume Number	IA-19
Issue Number	6
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1983-11-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Lamps Brightness Fixtures Photometry Costs Electron tubes Industry Applications Society Sockets Lighting control System performance
Content Type	Text
Resource Type	Article
Subject	Industrial and Manufacturing Engineering Control and Systems Engineering Electrical and Electronic Engineering

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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