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
Diversity, Equity, Inclusion and Respect (DEIR) Committee
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
Sustaining Member FAQs
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)
Speaker/Paper/Poster Submissions
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
Other Industry Events Calendar
Maritime Regional Conference
IES Events Photo Gallery
Standards
The Lighting Library®
Purchasing the Lighting Library
Lighting Library FAQs
The Interactive Illuminance Selector
Reference Retriever User Guide
IES Standards Cross-Reference
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)
Standards Errata & Addenda
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 Advisory Panel
Education Supporters
Speakers Directory
(Members Only)
Facilitator Directory
(Members Only)
Lighting Industry Certifications
Education FAQs, Forms & Guidelines
Educational Webinars
Register for Webinars
Archived Webinars
IES eLearning Portal
IES Video Series
Educational Podcasts
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
2021 Manufacturers Directory
diurnal
5 July 2018
July 5, 2018
Post navigation
[12.8.1.2] Pertaining to the
daylight
hours, as opposed to
nocturnal
.
« Back to Definitions Index
