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Light for Life® Virtual Symposium: Sustainability
IES25 The Lighting Conference
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About
Our Organization
About The IES
Diversity & Inclusion
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Administration
IES Staff
IES Board
IES Committees
Information
Newsroom
Annual Report
Resources
Membership
Membership
Become a Member
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Emerging Professionals
IES Committees
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University Program
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Information
Events Home
Events Calendar
Sponsorship
Featured Events
Light for Life® Virtual Symposium: Sustainability
IES25 The Lighting Conference
SALC 2025
Special Events
Light for Life® Virtual Symposium Series
Lightfair 2025
Illumination Awards & Gala
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Sections
Become a Member
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About IES Research
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Browse Library of Lighting Standards
Nomenclature & Definitions
Join a Technical Committee
Information
Standards Newsletter
IES Standards Process
Cont. Maint + IES Standards List
IES Standards in Public Review
Toolbox
IES Standards Toolbox
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Sky Glow
April 19, 2021
Figure 4 – Visual efficiency functions.
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Figure 4 – Visual efficiency functions.
