Skip to content
Search for:
Join
Contact
My IES Portal
IES Bookstore
Sign In
MENU
MENU
MY IES
MY IES Portal
(Members Only)
MY IES Profile
MY IES Contacts
MY IES Communities
MY IES Discussion Posts
MY IES Blogs
MY IES Transactions, Registrations & CEUs
Community Help/FAQs
Video Tutorials
About
About the IES
Mission, Vision & Beliefs
History
Board of Directors
Governing Documents & Policies
Annual Reports
Press Releases
IES In the News
IES Staff
Careers at the IES
Contact Us
Membership
About Membership
Join the IES
Sustaining Members
Emerging Professionals
Renew Membership
IES Member Directory
(Members Only)
IES Manufacturer Directory
IES Progress Report
About Sections/Districts
Find a Section
Section/District Forms and Documents
(Members Only)
Section Communities
(Members Only)
Society Awards
Grants & Scholarships
Career Center
Events
IES Calendar of Events
Annual Conference (AC)
Registration
Speaker/Paper/Poster Submissions
Program
Hotel/Venue/Airfare
Exhibitors
Conference Sponsors
Conference EP Program
Committee/Contact
IES @ LIGHTFAIR
Street and Area Lighting Conference (SALC)
Registration
Program
Hotels/Venue/Airfare
Exhibitors
Committee/Contact
Roadway Lighting Committee Meeting
Teachers of Lighting Workshop (TOLW)
Illumination Awards (IA) & Gala
Submittal Procedures
[PDF 302KB]
Submission Tutorial
[PDF 489KB]
Online Judge Instructions
[PDF 179KB]
Score Sheets
[ZIP 185KB]
Frequently Asked Questions
[PDF 118KB]
Illumination Awards Recipients
Other Industry Events Calendar
Advanced Education Fly-in (AEFI)
Maritime Regional Conference
Standards
About IES Standards
List of Standards
(IES Lighting Library)
The Lighting Handbook
Nomenclature and Definitions
RP-16-17 (Free)
Jointly Published Standards
IES Standards in Public Review
Committees
About IES Committees
Join a Committee
Non-Technical Committees
My Non-Technical Committees
Technical Committees
Committees Resources
Open Committees
My Technical Committees
The Standards Committee
Advisory Panels
Research
About IES Research
Current Projects
Past Projects
Events
Research Symposia
Research Workshops
Annual Conference Paper and Poster Sessions
Portal Open Now
Publications
LEUKOS
100 Significant Papers
Symposium Proceedings
Annual Conference Proceedings
2016 Strategic Research Plan
FIRES Forum
Policies and Submission Information
Grants
Education
About IES Education
Educational Webinars
Register for Webinars
Archived Lighting Education Webinars
(Members Only)
Archived Lighting Standards Webinars
(Members Only)
Archived Section Webinars
(Members Only)
Face-to-Face Materials
Fundamentals of Lighting
Intermediate Seminars
Post-Fundamentals Courses
Educational Videos
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
Archived Conference Materials
Annual Conference Presentations
Progress Reports
Speakers Directory
(Members Only)
Facilitator Directory
(Members Only)
IES Lighting Ready Reference App
(Free Download)
Lighting Industry Certifications
LC Study Group
Education FAQs, Forms & Guidelines
Outreach
About IES Outreach
Alliances
Policy Briefs/Documents
Position Statements
Letters to Public Officials
Policy Updates/News
LD+A
About LD+A
Advertise
LD+A Editorial Calendar
LD+A Writer's Guidelines
Subscribe
Current & Back Issues
(Members Only)
Hot Topics
LD+A Featured Content
Trending Articles
Projects in Videos
Project Photo Gallery
IES in LD+A
Illumination Awards Recipients
The Emerging Professional
2018 Lightfair Wrap Up
2018 Progress Report
2019 Manufacturer 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
We use cookies to give you the best experience on our website. By continuing to browse the site, you are agreeing to our use of cookies.
You can change your cookie settings at any time but if you do, you may lose some functionality.
More information can be found in our
Cookie Policy
,
Terms and Conditions
and
Privacy Policy
pages.
Accept
Privacy & Cookies Policy
necessary
Always Enabled
non-necessary
