Skip to content
Search for:
Join
Donate
Contact
MY IES
IES Webstore
Sign In
MENU
MENU
About IES
About the IES
History
Mission, Vision & Beliefs
Board of Directors
IES Staff
Careers at the IES
Governing Documents & Policies
Annual Reports
Contact Us
Society Awards
About IES Local Sections
Find a Section
Section/District Forms and Documents
(Members Only)
IES Committees
Join a Committee
IES In the News
Press Releases
Other IES Resources/Programs
Illumination Awards
IES Progress Report
Grants & Scholarships
IES Manufacturer Directory
Career Center
Membership
Individual Membership Benefits
Sustaining Membership Benefits
University Membership Benefits
Join the IES
Code of Ethics and Standards of Professional Conduct
Emerging Professional Program
Events
IES Calendar of Events
Annual Conference (AC)
Program
Conference EP Program
IES Leadership Forum
Committee/Contact
Archived Presentations
(Members Only)
Progress Reports
(Members Only)
Street and Area Lighting Conference (SALC)
Registration
Program
Call for Presenters
Exhibitors
Committee/Contact
Light for Life – A Global Collaboration
Illumination Awards (IA) & Gala
IES @ LIGHTFAIR
IES Virtual Research Symposium
Other Industry Events Calendar
Maritime Regional Conference
IES Events Photo Gallery
US DOE Lighting R&D Workshop Co-sponsored by the IES
Student Poster and Design Competition
Standards
The Lighting Library
™
Purchasing the Lighting Library™
IES Standards Cross Reference
The Lighting Library™ FAQs
Reference Retriever User Guide
The Interactive Illuminance Selector
IES Standards Process
The Standards Committee
Advisory Panels
Technical Committees
Open Technical Committees
Committee Resources
IES Standards in Public Review
Nomenclature and Definitions
ANSI/IES LS-1-20 (Free)
Committee Reports
Research
About IES Research
Current Projects
Past Projects
Events
Research Symposia
Research Workshops
Publications
LEUKOS
100 Significant Papers
Symposium Proceedings
Annual Conference Proceedings
2016 Strategic Research Plan
FIRES Forum
Policies and Submission Information
Opportunities
Grants
Visionary Challenge
Education
About IES Education
Education Supporters
Speakers Directory
(Members Only)
Facilitator Directory
(Members Only)
Lighting Industry Certifications
Education FAQs, Forms & Guidelines
Educational Webinars
Register for Webinars
Archived Lighting Education Webinars
(Members Only)
Archived Lighting Standards Webinars
(Members Only)
Archived Section Webinars
(Members Only)
IES eLearning Portal
Educational Series
Indispensable Lighting Series
Lighting Education Facility Showcase
Trailblazers & Icons
(Members Only)
Vintage Recordings
Educational Podcasts
Forces of Change (with Mark Lien)
Lights of the Round
Architecture for Light
Trailblazers & Icons
FIRES Podcast Series
Face-to-Face Materials
Fundamentals of Lighting
Post-Fundamentals Courses
Intermediate Seminars
IES Lighting Ready Reference App
(Free Download)
Teachers of Lighting Workshop (TOLW)
LC Study Group
Outreach
About IES Outreach
Alliances
Policy Briefs/Documents
Position Statements
Letters to Public Officials
Outreach News
LD+A
About LD+A
Advertise
LD+A Editorial Calendar
LD+A Writer’s Guidelines
Subscribe as a Non-Member
Current & Back Issues
(Members Only)
LD+A Featured Content
Trending Articles
Hot Topics
Projects in Videos
Project Photo Gallery
IES in LD+A
Illumination Awards Recipients
The Emerging Professional
2019 Lightfair Wrap Up
2020 Progress Report
2019 Manufacturer Directory
constant lumen output
24 June 2020
October 8, 2020
Post navigation
[13.9]
[See
lumen maintenance control
.]
« Back to Definitions Index
