Navigant Research Blog

Green Light for Roadway Lighting Controls

Jesse Foote — May 5, 2014

Numerous cities around the world have begun replacing outdoor lights with light-emitting diodes (LEDs), though many of them have not been able to take advantage of the superior dimming capabilities of LED lighting or the inherent controllability that this semiconductor-based lighting technology offers.  In order to dim an LED light, a control device must have direct access to that LED’s driver.  This means that the manufacturer of the LED luminaire must either integrate its own controls or partner with a controls company to allow for communications between the driver and the controller.  A city customer that wants smart dimming controls must, therefore, select both fixture and controls vendors up front, limiting its options and making the decision much more complicated.

Fortunately, this roadblock has recently been removed.  With the publication of NEMA/ANSI standard 136.41 in February, manufacturers now have a single standard to follow so that any company’s controller will work with any other company’s luminaire.  Products that meet this standard are quickly coming into the market.  TE Connectivity has begun manufacturing the receptacle and contacts that provide interconnection between a compliant controller and a luminaire, giving luminaire manufacturers an easy means to produce compliant luminaires.

We Approve

Big lighting players such as Acuity Brands and Philips have come out with products that meet the new standard, and even smaller decorative outdoor lighting companies, such as Sternberg Lighting, are committing to offering compliance with the standard as an option on new products.  The controls companies themselves have been very enthusiastic, with CIMCON Lighting announcing compliant product lines immediately after the standard was published and a representative from Sensus describing the publication to me as a watershed event.

Navigant Research expects that adoption of this NEMA standard will become so widespread in outdoor lighting fixtures that many cities will install compliant products without even specifically requesting them.  Those cities will then be free to add smart networked controls at any point in the future by simply plugging in compliant controllers into the top of lights.  This freedom, both in the timing of the controls installation and in the choice of what products to use, is expected to lead to rapid growth in the number of networked systems.  In a recently published report titled Outdoor and Parking Lighting Systems, Navigant Research forecasts that revenue from the sale of intelligent control devices will increase at a compound annual growth rate (CAGR) of 18% through 2023, and that revenue from the sale of controls software will increase at a CAGR of 43%.  That growth will be driven by a number of factors, including falling LED prices and increased expectations for monitoring and control, but it will be facilitated along the way by standardization efforts such as this one.

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