Space (volumes of air) cannot be lit! The electromagnetic energy known as light is not visible until it hits surfaces and reflects from them or transmits through them. Objects and surfaces are lit to enable occupants to perceive space volume. The principles and techniques discussed in Architectural Lighting Design 3rd Edition (ALD3e) lay the groundwork for creative lighting solutions addressing vision and psyche issues for occupants.

News and Events

[May 3-7, 2009]

New York City. LIGHTFAIR INTERNATIONAL Annual Institute, Trade Show, and Conference.

[September 27-29, 2009]

Dubai. light Middle East  Trade Show and Conference.

[October 9-13 and 15-18, 2009]

Washington. US DOE Solar Decathlon. Collegiate competition.

[November 15-17, 2009]

Seattle. Illuminating Engineering Society Annual Conference.

[February 4-5, 2010]

London. The ARC Show.

[April 11-16, 2010]

Frankfurt. Light + Building Biennial Exhibition and Conference.


Online. Wiley Continuing Education at WileyCPE.com.

About this Site

This website is a companion to ALD3e and offers expanded and additional resources for those interested in architectural lighting. As an art and a science, some aspects here relate to design and creativity and others relate to illuminating engineering. Explore and enjoy.


This site is presented by Gary Steffy Lighting Design Inc. Use of this site signifies you have read and agree to the terms.

©2008 Gary Steffy Lighting Design Inc. Images copyright by respective photographers and/or sources. Header images, from left to right,     1) ©Gene Meadows,  2) ©Kevin Beswick, 3) ©Gene Meadows, and 4) ©Kevin Beswick. Footer image ©Kevin Beswick.