11/14/2006

Luminance Requirements for Signage Investigated by Researchers

Signs that are too bright waste energy and cause light pollution

 

The Troy, NY-based Lighting Research Center (LRC) recently studied luminance requirements for backlighted, channel-letter signs. The organization’s research is significant because, to date, no signage-related luminance standards based on visibility exist in North America. In a recent LRC news release authored by Jennifer Taylor, signage is often brighter than necessary to try to compete with other nearby lighted signs. “This practice has drawbacks of higher energy use, light trespass, and light pollution,” explains Taylor.

LEDs were identified as a possible replacement for neon and fluorescent lamps in channel-letter signs, which, according to the LRC, consist of individual letters with a lighting system inside a metal case topped by a plastic diffuser. LRC Research Assistant Professor Jean Paul Freyssinier notes that LEDs - particularly red LEDs - can offer both energy and maintenance savings in these applications. Led by Freyssinier, a research team conducted a human-factors study aimed at determining a suitable range of luminances for red channel-letter signs. Findings revealed the impact of bright backgrounds on perceptions of sign brightness, with brighter backgrounds calling for brighter signs.

Standalone signs required a higher level of sign brightness than those with adjacent signage. “Most likely,” says Freyssinier, “adding the adjacent signs increased the overall luminance of the background, which led to a preference for a brighter sign.” Not surprisingly, a greater viewing distance also warranted brighter signage.

To read LRC’s reporting on this study, visit (www.lrc.rpi.edu/resources/newsroom/enews/Oct06/Research22.html).

 

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Visit our website today to learn about the design flexibility of a Morton building and the endless possibilities of partnering with our designBUILD team.


Wood construction is both cost and energy efficient. Check out Morton Buildings and our designBUILD team online today to discover all the benefits of post-frame construction.


When choosing a metal-clad building for your next construction project, consider Morton Buildings, Inc., and their designBUILD team, we’ll make your dream a reality.

Bluebeam® Revu® simplifies digital facilities document management from design review to leveraging as-builts, maintenance manuals and O&Ms submittals.

Yaskawa drives offer quality performance for air handlers and cooling towers on the roof to secondary chilled water pumps in the basement

We Can Help You Reduce Energy by 30%

Our mission is to help our customers manage their buildings' energy costs, improve reliability, and enhance performance while having a positive impact on the environment.
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