02 Sep 2011

With street lighting, how much light is enough?

Members of the Northwest Energy Efficiency Alliance (NEEA) will seek the answer to this question and others with a new solid-state lighting and control system street-light demonstration project in Seattle, Washington this fall. Other participating team members include engineers and scientists from Continuum Industries (Anchorage, AK), a high-efficiency lighting and control system building firm, lighting designer Clanton & Associates (Boulder, CO), and the Virginia Tech Transportation Institute (Blacksburg, VA).

The study will build on prior tests conducted by the team in Anchorage, San Diego and San Jose, which suggested that visibility benefits from broad spectrum street lights could be maintained while dimming to 50% light levels for improved energy savings during certain hours. The Seattle study will also introduce new variables such as wet roads and asymmetric luminaires.

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