DonateJoinSign In
Event

Register Now!

The IES Street & Area Lighting Conference registration is now open. Book Now – Early Bird Discounts end June 30!

MORE
Event

Take your lighting career to the next level

Learn more about the study group, the exam, and how to sign up today!

More
Event

Don't Miss Out!

Register now for the IES25 Lighting Conference. Take advantage of the lowest hotel rates too!

More
Membership

Become an IES Member today

Join our community of lighting professionals and enjoy the benefits

Join Now
Join us | Become an IES Member today
Standards

IES Illuminance Selector

Design your projects to IES/ANSI recommended light levels faster than ever though the Illuminance Selector

Get Now
The Illuminance Selector | How much light do I need?
Membership

Become a Sustaining Member

IES Sustaining Membership is for companies, institutions, and other organizations regardless of staff size or operational budget.

Learn More
IES Sustaining Memberships | Support us, support the industry
Upcoming
July 17, 2025 12:00 pm 1:00 pm

Glare Affairs: Navigating Nighttime Discomfort with Diverse Models

What is a discomfort glare model, and why do we need one? This webinar will explore the methods used to develop discomfort glare models, the variety of models applied in…

Upcoming
July 30, 2025 12:00 pm 4:00 pm

Light for Life®: Sustainability Symposium

A holistic approach to sustainable lighting design Overview Welcome to the Light for Life®: Sustainability, a four (4) hour virtual symposium focused on the role of lighting in sustainable design…

Upcoming
August 14, 2025 12:00 pm 1:00 pm

ANSI/IES TM-30 for Fine Art Under Low Illuminance

Conservation can restrict light levels low enough to be subject to the Hunt Effect, a perceived decrease in saturation. A pair of Penn State studies explored the application of a…

Featured Event

Light for Life Virtual Symposium Series | Sustainability Symposium | July 30, 2025 | 12 noon - 4 pm ET | More information at ies.org/lightforlife | IES
Upcoming
July 17, 2025 12:00 pm 1:00 pm

Glare Affairs: Navigating Nighttime Discomfort with Diverse Models

What is a discomfort glare model, and why do we need one? This webinar will explore the methods used to develop discomfort glare models, the variety of models applied in…

Upcoming
July 30, 2025 12:00 pm 4:00 pm

Light for Life®: Sustainability Symposium

A holistic approach to sustainable lighting design Overview Welcome to the Light for Life®: Sustainability, a four (4) hour virtual symposium focused on the role of lighting in sustainable design…

Upcoming
August 14, 2025 12:00 pm 1:00 pm

ANSI/IES TM-30 for Fine Art Under Low Illuminance

Conservation can restrict light levels low enough to be subject to the Hunt Effect, a perceived decrease in saturation. A pair of Penn State studies explored the application of a…

Upcoming
August 21, 2025

IES25 The Lighting Conference

Join us in Anaheim, California, 21-23 August 2025 for IES’ annual conference, IES25: The Lighting Conference, the preeminent conference for all things lighting, from research to design to technology and…

Featured Event

Light for Life Virtual Symposium Series | Sustainability Symposium | July 30, 2025 | 12 noon - 4 pm ET | More information at ies.org/lightforlife | IES

The IES is on a mission to improve life through quality of light

Wherever you are in your professional journey, we have the resources to support you.

LIGHTING DESIGN & APPLICATION

LD+A is for professionals involved in the art, science, study, manufacture, teaching & implementation of lighting.
View All Issues

.

A view of the museum’s roof with new skylight domes and original louvres . | Photos: Richard Capsole

Daylight at the Museum

The Yale Center for British Art lets the (diffused) sunshine in New Haven, CT’s Yale Center for British Art (YCBA), home to the largest collection of British art outside the…
Read More

.

The indoor climber featured in a neurotypical light setting. | Photos: Scott Weaver

Keep Your Head in the Clouds

Atypical design allows everyone to have fun at La Nube What were your childhood dreams? Flying high above your hometown in a homemade airplane? Exploring the depths of a mysterious…
Read More

.

Ask an EP: Nehar Agnihotri

This class-of-2026 graduate student at Parsons School of Design discusses the impact of light as a constant amidst a changing landscape. Why light? I saw the power of intentional lighting…
Read More

Join Our Mailing List

Subscription Form

Thank you for generously supporting our efforts to improve life through quality of light.

Cooper Lighting Solutions logoSignify logoSonepar Powered by Difference | Logo