Outdoor lighting provides safety, security, aesthetics, and economic
development opportunities. There are many valid reasons to light the
outdoors. However, it is important to understand how much outdoor
lighting is enough and how to balance the need for light while
minimizing light pollution and increasing energy efficiency.
The LRC investigates effective outdoor lighting
techniques and equipment that provide cost-effective energy
improvements and minimize wasted light, light pollution, glare,
The Potential for Outdoor Lighting for Stimulating the Human Circadian System - An ASSIST technical paper evaluates the potential for outdoor lighting systems to stimulate the circadian system in humans. After evaluating four light sources, researchers determined that three of the four would not meaningfully stimulate the circadian system after one hour of exposure under two typical street lighting conditions.
Parking Lot Luminaire Evaluation and Calculator - ASSIST's parking lot luminaire evaluation method allows for comparison and rank ordering of products during the luminaire selection process, based on standard application requirements. An accompanying calculator performs all the calculations following ASSIST's method using the luminaire's intesity distribution file (e.g., IES file).
ASSIST recommends: Outdoor Lighting: Visual Efficacy - This issue by ASSIST discusses a new, unified system of photometry that would more accurately characterize different light sources at any light level, facilitating the specification of effective lighting systems for different applications, including those used outdoors at night.
OSP Methodology – Glow and Trespass - For those interested in using OSP to evaluate glow and trespass for their outdoor lighting installations, the following instructions explain the calculation procedure.
NLPIP Lighting Answers: Light Pollution - A general guide that discusses the three elements of light pollution (sky glow, light trespass, and glare) and gives examples and recommendations for minimizing or eliminating the undesirable effects of each element when designing and using outdoor lighting.
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