Street lighting LEDs: Coming soon to a street light near you

February 01, 2023

- Philips Limileds -

LEDs have been taking to the streets since the 1990s, when cities throughout the US and Europe
Replacement incandescent-based traffic lights with highly energy-efficient solid state fixtures. Today's power LEDs are poised to cross the next municipal frontier and tackle the challenge of street lighting.

If the mass adoption of solid state traffic signals is any indication, high pressure sodium, and high intensity discharge (mercury vapor) street lamps may soon lose their luster as the dominant sources of road and sidewalk illumination.

The first Led Street Light installations are already being tested around the world, and in some cases implemented, in China, North America and Europe, as governments, municipalities and utilities strive to replicate the energy and maintenance savings of LED traffic lights elsewhere within their borders .

With a 10-to 15-year lifetime that is at least triple that of current technologies, the maintenance advantages alone offer a street-smart argument for transitioning to LED-based systems. When we consider the design flexibility and sustainability afforded by LED-based Systems, the case for solid-state street lighting is compelling.

LED solutions offer energy savings of as much as 50%, other 'green' features are mercury-free construction, and reduced light pollution made possible by the ability to precisely control light direction through LED placement and optics optimization.

Moreover, street lamps using today's power LEDs are fully capable of meeting standard regulations for luminance levels and uniformity. LED solutions, unlike many other technologies, provide a suitable even light distribution (as shown in Figure 2) to meet recommended street light uniformity levels. This is a valuable benefit that is capable of eliminated glare, hot spots and related visibility, safety and energywasting problems.

Even light distribution improves the street lighting function and creates a better environment for people. All of these factors add up to make solid state street luminaires a bright idea.

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