Excessive luminances or luminance contrasts may also lead to a visual sensation called glare, which, even though it is also light, can impair or disable vision rather than enable it. Glare is categorized as several different types according to its effects. Direct glare is caused by directly viewing a light source, such as a bright [...]
Lighting Design
Specifying Color Quality of Lamps
Specifying color quality appropriate for the application is essential. In a high-end retail application, good color quality can make products, especially clothing, appear more vibrant, truer and ultimately more appealing. In an office application, color quality can facilitate social interaction by rendering faces more naturally and thereby helping to create a more productive and appealing [...]
Maximizing Visual Comfort: Tired Eyes and Uniformity
Lighting quality goes beyond task performance to address other needs related to aesthetic judgment, mood and atmosphere and visual comfort, all of which indirectly affect user satisfaction and task performance. The first two needs, often left out of the retrofit process, become primary considerations in a relighting or new construction project, covering patterns of light, [...]
Task Visibility and Performance
One of the most important functions of a lighting system is to support visual performance by ensuring appropriate visibility of tasks and objects the designer wants seen. The human eye can adjust to a wide range of light levels, including about 10,000 footcandles on a sunny day to about 0.01 footcandles under full moonlight. As [...]
Light and Visibility: What is Light?
Light is radiant energy that travels in waves composed of vibrating electric and magnetic fields. Light waves have both frequency and length; the ranges of frequency and wavelength differentiate light from other forms of radiant energy such as heat and radio waves. These properties are expressed on the electromagnetic spectrum. Certain light waves comprise a [...]
IESNYC Lumen Awards Celebration to be Held June 9, 2010
IESNYC has announced that the Lumen Awards Ceremony and Gala will be held at Chelsea Pier 60 on Wednesday, June 9, 2010 starting at 6:00 PM. IESNYC will be celebrating the 2010 Lumen Awards recipients. Cocktail hour starts at 6:00 PM and the dinner ceremony commences at 7:30 PM. Sponsorship tables are now available for [...]
Electrical Contractor Publishes Feature About Lighting Design Techniques
An article I wrote for Electrical Contractor Magazine about lighting design and, specifically, different techniques used to apply light to spaces, was published in the April issue. If you’re interested in a good introduction to basic design techniques, I highly recommend a read. Check it out here.
IESNYC Nightseeing Tour to be Held May 26, 2010
IESNYC has announced the Spring NightSeeing Walking Tour, a “multi-project tour on art, fashion and cocktails,” to be held Wednesday, May 26, 2010 from 6:00 PM to 9:00 PM. Starting Location: CIT Lobby 505 Fifth Avenue (entrance on 42nd Street) New York, NY IESNYC Members: $15 Non-Members: $30 Space is Limited. Please RSVP by Monday, [...]
Education + Resources, Lighting Design
IES Publishes Guide to Lighting for the Aging Eye
Providing good lighting for senior living spaces is an important topic that is only going to get more important in the future. Check it out here.
Commissioning Lighting Systems: How Do YOU Do It?
I am being engaged to produce a Recommended Practice for IES on the subject of commissioning lighting and controls. I have ample information and recommended procedures for commissioning popular lighting control systems such as occupancy sensors, time sweep, daylight harvesting and architectural dimming. Right now I’m looking for procedures for commissioning lighting. My understanding is [...]
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