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INDUSTRIAL LIGHTING
The utility has estimated the simple payback for LED conversion
of residential lights at 7.7 years. Once all residential fixtures have
been replaced, they will save the City an estimated $2.4 million
in annual energy and maintenance costs.
Case study 4: New York City
New York City has embarked on an LED conversion project which
when completed will be even larger than that of Los Angeles.
The project began along highways in 2011 and by 2017 240,000
lights will have been replaced across all five boroughs.
Australian road lighting standards
It may come as a surprise that the current Australian standard for
road lighting excludes LEDs.
The Australian standard AS 3771 - Road lighting luminaires with
integral control gear was published in 1990 as a consequence of
a multitude of contracts and specifications issued by the former
electricity supply authorities. In 2004 this was superseded by
AS/NZS 1158.6 Lighting for roads and public spaces Part 6:
Luminaires which adopted some of the principles within the
international road lighting standard. However it was – and
remains – highly prescriptive, so much so that it effectively rules
out the use of LEDs.
In an attempt to redress the prescriptive nature of AS/NZS
1158.6, Standards Australia committee LG-002 is now updating
the standard. The first stage will see some reduction in the
prescriptive elements and, importantly, the admission of LEDs.
It is anticipated this new version will be available in May 2014.
The second stage of the reform process will take longer and is
expected to result in a standard that more closely reflects the
international standard IEC 60598-2-3 Luminaires for road and
street lighting.
International Energy Agency’s 4E SSL Annex
The Solid State Lighting Annex was established in 2009 under
the framework of the International Energy Agency’s Efficient
Electrical End-Use Equipment (4E) Implementing Agreement to
Govlink I Issue 1 2014
provide advice to its 10 member countries – one of which is
Australia – seeking to implement quality assurance programs
for SSL lighting. The goal of this work is to reduce the risk in
using SSL products and to provide Governments and consumers
with recommendations they can trust when investing in SSL
products. The performance tiers identify a suite of metrics and
values related to minimum performance values of SSL for energy
efficiency, lighting quality and safety.
In October 2013 the IEA published Outdoor Lighting (Street
Lighting) as part of the 4E SSL Annex. The performance criteria
for this category of lighting include:
• Minimum downward luminaire efficacy (lm/watt)
• Lumen maintenance
• Minimum rated luminaire lifetime (F50)
• Colour rendering index (CRI)
• Colour maintenance (Δ u’,v’ at 6,000h)
• Operating temperature (range °C)
• Ingress protection (IP), Impact protection (IK)
• Correlated colour temperature (K) and tolerance <6500K
• Chromaticity tolerance (Du’v’)
• Flicker (flicker index)
Further information may be found at http://ssl.iea-4e.org/
Careful consideration required when investing in LEDs
Earlier this year Lighting Council Australia invited Professor
Georges Zissis, head of the Light and Matter Research Group
at LaPlaCE (Laboratoire Plasma et Conversion d’Énergie) at the
University of Toulouse and a world-renowned expert in lighting
systems research and design, and in particular its application for
street lighting, to deliver seminars in Australia. In addition to his
role at LaPlaCe, Professor Zissis is Task 1 Leader of the IEA’s 4E
SSL Annex referred to above.