B E K A - L I G H T I N G N E W S , V I E W S A N D R E V I E W S

issue 01

08

East London Esplanade

The biggest supply contract of road lighting luminaires in South Africa was awarded to BEKA (Pty) Ltd. This award is for the ambitious project of the South African National Roads Agency Ltd (SANRAL), to improve the existing and future highways in Gauteng with new lighting.

Gauteng, the economic heartland of South Africa, generates nearly 38% of the total value of South Africa’s economic activities. Development in housing, offices, retail and industrial properties has grown significantly over the past 10 years, resulting in above average traffic growth.

Unfortunately, provision of road infrastructure has not kept up with the increased traffic demand, ensuing in a road and freeway network that is over capacity.

The over-saturated condition on the freeway network is affecting the quality of life, the productivity of the economy, the development potential of the region and the direct cost of travel.

In order to improve the current traffic flow situation and to provide a road network that will stimulate the development potential in the province, the South African National Roads Agency Ltd (SANRAL) is upgrading the existing network, as well as providing additional infrastructure.

During the initial construction period, from July 2008 to May 2010, the existing network will be enhanced by the addition of lanes and improvement of intersections.

For all highways the implementation of an Intelligent Transportation System (ITS) for the effective management of the network is implemented. ITS devices such as CCTV will assist in early detection of incidents/crashes and assistance/clearance thereof. Thereby a safer

BEKA lights up Gauteng highways

S P E C I A L F E A T U R E O F T H I S I S S U E

Continued on page 4Artist impression of the ONYX 33 installation

B E K A - L I G H T I N G N E W S , V I E W S A N D R E V I E W S enlighten

2008 / 3

From the MD’s DeskWe are living in interesting times! No, I do not want to comment on our local political

events, but I refer to the many challenges and opportunities which are facing lighting

companies, like BEKA. If I would have been asked some 5 years ago, about exciting

developments in the Lighting Industry, I would have confessed that nothing really

interesting and revolutionary has been happening for some decades.

Now, we are faced with a new lamp technology, the Light Emitting Diode, in short,

LED, which will be changing the lighting world we are living in.

The simplicity with which LEDs are dimmed and colours changed is due to the

availability of ever increasing electronic control technology, enabling the provision of

the right lighting, at the right time and for the right application and mood. Nothing of

this sort would have been feasible with conventional technologies.

BEKA has recognised the looming change of technologies well in time in order

to align its product range and customer support in such a manner that these

technologies, as they become more efficient and cost effective, be offered in

technically good performing lighting products. This is what the market expects from

BEKA’s products.

This has become evident in the fact that BEKA was chosen to supply the most

ambitious LED lighting project of the Southern hemisphere, namely, to light the

façade of the Arch spanning over the Moses Mabhida World Cup 2010 Stadium.

Refer to page 4 for more details.

BEKA has, with its international partners, the Schréder Group and, on this project,

OSRAM, committed itself to provide a turn-key solution for this high-profile project.

This project will be the starting point for BEKA’s substantial range of LED luminaires,

to be available to its customers nationally and internationally.

BEKA is proud to be recognised as the strongest professional lighting brand

in Sub-Saharan Africa. Its level of competence and its comprehensive range of

quality luminaires, developed in South Africa, make BEKA the preferred partner for

professional customers in this important and growing market.

We have adapted to the new technologies like no other manufacturer on this

continent, and we are ready to offer you the most technically advanced solutions.

Johann Schleritzko

CONTENTS

Company News

BEKA lights up Gauteng Highways inside front

Public Lighting Networks - How to reduce energy consumption! 10

Applications

LED Arch Lighting for the Moses Mabhida Stadium 4

Lighting of Johannesburg Soccer City - Precinct 5

East London Esplanade gets new facelift 6

Howick Sports Stadium 7

BEKA illuminates Premier Auto’s new showroom and workshop 7

Product News

New Products recentlylaunched by BEKA 8

BEKA’s new floodlight version,the BEKAMAX-F 600W 8

BEKA VAPOURLINE , an industrial corrosion-resistant fluorescent luminaire 8

BEKA T-BAY, a quality fluorescent highbay 9

Expanded range of BEKA products for high powered 85W and 120W CFL lamps 9

Technical

New System to be introduced for Luminaire Efficiency 10

What is DALI? 11

2008 /4

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This contract will include: • The supply of 750m of LED units, comprising a total of 14,832 LEDs, Type OSRAM Golden Dragon.

• These LEDs are to be controlled by 412 DMX channels, generating a dynamic lighting pattern along the arch of the stadium.

• BEKA shall be responsible for the design of the LED channels and bracket supports, as well as the design of the LED control units, comprising power supplies and DMX drivers.

• BEKA will supply and install the supporting DMX Control infrastructure, which ensures the dynamic lighting of the Arch façade.

• The quality assurance will be given the highest priority, due the accessibility

LED Arch Lighting for theMoses Mabhida Stadium

of the arch being extremely limited once complete.

• All design solutions will be validated by R-Tech, which is the Research & Development Company of the Schréder Group, as well as OSRAM laboratories.

• BEKA shall also be appointed for the installation and commissioning of this lighting solution.

• The final value for the complete contract is anticipated to be R4,5 million.

BEKA’s comprehensive solution was chosen, based upon the offered design, manufacture, installation and commissioning for the LED lighting for one of the world’s most challenging show pieces.

BEKA has been awarded the LED lighting for the Arch of the Moses Mabhida Stadium in Durban, South Africa, which is the most prestigious LED contract in the Southern Hemisphere.

This Arch, which has a façade height of 6m, and which will reach a height of 110m above the stadium ground, will be the architectural centrepiece of this stadium and will become a tourist highlight, since it will be made accessible to visitors of the City.

road environment can be achieved.

In order to support the ITS, a quality lighting installation is required which will also improve roadside security at night.

The need for quality lighting has been reflected in the specification which has been commissioned by the NRA (National Road Agency), and which was based on: • Quality of luminaire hardware• Minimum capital cost per km• Minimum energy cost per km• Minimum maintenance cost per km

BEKA is pleased to report that its luminaire, the ONYX 33 600W, was chosen for this ambitious project, which requires the delivery of 6500 luminaires over a period of 5 years.

This represents an order value of over R25 million, and is the biggest order for streetlight luminaires ever awarded in Southern Africa.

The luminaires will be installed on 20m masts, which are mounted on the F-shape median barriers in the

BEKA lights up Gauteng highways - continued from inside front

Continued on page 6

2008 /5

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The Precinct of the Johannesburg Soccer City World Cup Stadium consists of all roads and parking areas surrounding the stadium.

For these prestigious areas, the architects were devising a lighting concept which shall be unique and blend into the design concept of this area.

A geometric shape was chosen to contrast with the “earthy” feel of the stadium.

After a thorough evaluation process, which included the quality of the design finishes and efficiencies of the luminaires offered, BEKA has been chosen for this high profile installation.

The luminaires will be equipped with a 150W Metal Halide lamp, G12 lamp holder which operates in the highly efficient Micro reflector used in many other Schréder Urban luminaires.

The light source for the pedestrian luminaires is the 57W CFL lamp, which has been chosen for its instant cold and hot re-strike properties.

Lighting of JohannesburgSoccer City – Precinct

Both lamps are required in the Warm White colour, to support the architectural concept.

BEKA luminaires will feature at the Precinct of Soccer City and also in related areas, such as:

• The Rand Show Road and Nasrec Road• The main concourse lighting in the stadium• The canopy lighting of the stadium• The lighting of the adjacent railway station

We are proud that BEKA’s products and expertise are used in almost all Soccer World Cup 2010 installations.

BEKA supplies stadium lighting in Maseru, LesothoBEKA supplied the floodlighting at Setsoto Stadium in Maseru, Lesotho, to upgrade the lighting level to FIFA requirements.

In January 2006, Dyelec Consulting Engineers requested BEKA to provide a comprehensive solution to upgrade the existing lighting levels at the stadium. The existing masts were able to carry additional floodlights, but the existing floodlights were obsolete and unserviceable.

BEKA’s Applications Department proposed a few lighting options as well as a cost-effective solution to illuminate the stadium and ensuring compliance with FIFA requirements. The Application Department also made provision for 4 lighting level stages in their designs.

The client approved the BEKA STADIALUX 2kW floodlight, which embodies the sophisticated reflector system in a hail-proof aluminium housing, manufactured from LM6 aluminium alloy.

As a result of a tender process, BEKA was awarded the supply contract for 240 floodlights, four of these with instant re-strike systems.

BEKA has impressed the client by its quality products and the short timeframe in which we were able to manufacture and deliver the floodlights. The contract period was only one month.

B E K A - L I G H T I N G N E W S , V I E W S A N D R E V I E W S

The ONYX 33 proves that it is the most efficient luminaire for highway applications, when the energy consumption per kilometre of freeway is to be minimised. This is an important consideration in times of energy restraint in Southern Africa.

The luminaire can be supplied in a Power Switch version, which enables the reduction of light output, coupled with reduced energy consumption and extended lamp life.

BEKA is proud to have been able to offer this advanced group product for these prestigious installations in South Africa.

2008 / 6

For this purpose, the City requested proposals for the upgrading of East London’s beachfront boulevard, the Esplanade. The requirements were as follows:

1. The pole-luminaire combination shall be of extraordinary design, however timeless in its features.

2. The existing mounting positions shall be used, to prevent the re-reticulation of the road.

3. The lighting levels shall be in accordance with the lighting levels, as required for Class A2 Roads, as per SANS Code: SANS 10090: Lighting of Public Thoroughfares.

4. It shall be suitable to attach Christmas Decorations over the festive season. Hence the mechanical design shall be suited for this task.

5. The materials shall be suited for this harsh coastal environment, and all efforts must be made to make these columns and luminaires as maintenance free as possible.

6. The luminaires shall provide white, unobtrusive lighting, which shall prevent light pollution and interference for the residential apartments along the esplanade.

EAST LONDON ESPLANADEgets new facelift

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7. The system shall be able to operate as energy efficiently as possible.

Of the various proposals received, the proposal by Designer Lighting, a well established East London electrical contractor, received the highest plaudits and was awarded the contract, using HESTIA luminaires on curved 10 meter mounting height steel poles.

The HESTIA, with its advanced IP66 SUPRA reflector system offers supreme resistance to the humid seaside conditions. Its sleek design and high performing 2*150W Metal Halide lamps complete an eye catching combination on curved 10m mounting height steel poles. The street lighting was complemented by single HESTIA-Mini 150W Metal Halide luminaires mounted on the back of the poles over the sea-facing sidewalk.

By replacing the old 2*400W HPS and 1*400W HPS fittings with the new HESTIA, an energy saving of 36.2% has been achieved.

The new look of the East London Esplanade is a dazzling example of how a city’s best assets can be showcased using modern, high performing and aesthetically pleasing streetlighting.

The Esplanade of East London is one of the most visited destinations of the Eastern Cape. Its previous lighting scheme has not supported the vision, and the image, the City wanted to present.

median of the freeway at a spacing of 68.8 metres and will cover up to 6 lanes per travel direction.The ONYX 33 600W is a street light designed by the Schréder Group GIE, of which BEKA is member since 2002.

The luminaire consists of an aluminium alloy housing, manufactured of highly corrosion- resistant alloy and a completely sealed optical system.

This system, known as Sealsafe®, was invented by the Schréder Group in 1986, and results in the complete sealing of the lamp within the reflector housing to an IP66 rating. This IP rating ensures that the reflector system is protected against any deterioration as a result of ingress of dirt or moisture.

The ONYX 33 boasts an IP66 lamp compartment and an IP65 gear compartment. Another important aspect is the fact that the luminaire is suitable for ambient temperatures of up to 500C. Therefore, the components will never be in danger of overheating.

The Sealsafe® System results in the complete sealing of the lamp within the reflector housing to an IP66 rating.

BEKA lights up Gauteng highways - continued from page 4

B E K A - L I G H T I N G N E W S , V I E W S A N D R E V I E W S

2008 / 7

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In 2007, uMngeni Municipality developed an open piece of ground in Howick between the R103 Main Road and the River View Road into a multifunctional sports facility. The development consisted of a main soccer field, surrounded by an athletics track, with brick grandstand facility, practice soccer field, volley ball courts, tennis courts, car parking, picnic areas, and a large indoor multifunctional sports centre. This development is available to the local community, and

Howick Sports Stadium BEKA illuminates Premier Auto’s new showroom and workshopBEKA supplied decorative pendant and highbay luminaires to light up the new showroom and workshop at Premier Auto’s new premises in Bloemfontein.

In 2006, it was found that the existing showroom and workshop space was not adequate to accommodate the range of vehicles Premier Auto marketed, which led to a new showroom being built and their existing workshop to be expanded.

The Electrical Engineer from Dihlase Consulting Engineers – Bloemfontein, designed the showroom and workshop lighting utilizing the BEKADAZZLE and BEKABAY range of luminaires to General Motors specifications.

A total of 52 x BEKADAZZLE 150W MH and 12 x BEKALUCE 150W MH/E luminaires were installed in the relevant showrooms, and 42 x BEKABAY 400W MH highbays in the workshop. Furthermore, 47 x BEKARONDO-H 2 x 18W downlighters with electronic gear, 12 x BEKADART up/downlighters 35/70W, 10 x BEKA GEMINI 2 x 35W MH spotlights and 16 x BEKA SERIES 30 bulkheads were used in and around the premises.

BEKA is proud to be associated with such prestigious brands in the motor vehicle industry. We were able to provide not only excellent technical solutions but also ensured the client’s expectations and specifications were suitably addressed.

BEKA is proud to have supplied a number of products to the Howick Sports Stadium, which is intended as a FIFA standard training/match soccer field for the upcoming Soccer World Cup in 2010.

controlled from a central electrical room within the grandstand building.

The practice field and volleyball courts each required 6 x 18m masts with 3 x 1kW BEKA PROJECTOLUX Metal Halide floodlights on each mast. The multifunctional indoor centre required 35 x 400W BEKABAY Metal Halide enclosed High Bay light fittings, 19 x BEKA T-BAY 4 x 54W enclosed luminaires with lamps, and 9 x BEKA T-BAY 4 x 54W enclosed luminaires with one lamp on

is intended to support the uMngeni Municipality’s goal of providing a FIFA standard training/match soccer field for the upcoming Soccer World Cup in 2010.

Elliott, Breytenbach & Gray was commissioned by the uMngeni Municipality to design and implement the necessary lighting requirements for the sports facility. Once the design was completed, and the Basic Environmental Impact Assessment was performed and approved by the DAEA, a public tender was advertised and the project was awarded to an electrical contractor to perform. The contract was fully complete and commissioned within 6 months.

The lighting requirements of the main soccer field were to allow for National and Club soccer matches to be played (non-televised). This required a minimum average lighting level of 500 lux to be achieved. This required the construction of 4 x 30m masts with 23 x 2kW BEKA STADIALUX Metal Halide floodlights on each mast. The lighting stage switching is

emergency THX self-test battery backup. The lighting stage switching is controlled from a central electrical room within the indoor centre building.

This installation is one of many stadia in Southern Africa using the BEKA STADIALUX 2kW floodlight.

B E K A - L I G H T I N G N E W S , V I E W S A N D R E V I E W S

BEKA T-BAYQUALITY FLUORESCENT HIGHBAY

T - B A Y

BEKA T-BAY,a quality fluorescenthighbay.

BEKA VAPOURLINE,an industrial corrosion-resistant fluorescent luminaire.

New productsrecently launched by BEKA

2008 / 8

BEKA VAPOURLINE, an industrial corrosion-resistant fluorescent luminaire

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BEKA has added a new industrial corrosion-resistant fluorescent luminaire to its range, the BEKA VAPOURLINE.

It is designed for fluorescent lighting applications in industrial, mining and corrosive environments where high ingress protection is required. The luminaire consists of an injection-moulded, flame-retardant polycarbonate housing and prismatic diffuser. The diffuser is manufactured from the same material as the housing, thus ensuring the flame-retardant integrity of the luminaire.

The diffuser is secured in place through multiple sprung stainless steel clips which ensure the integrity of the IP66 rating.

Two of these clips keep the diffuser attached to the luminaire when hinged open, for ease of lamp replacement.

The BEKA VAPOURLINE is supplied with a complete mounting kit for suspension or

BEKA’s new floodlight version, the BEKAMAX-F 600WBEKA has expanded its popular BEKAMAX floodlight range by adding a 600W HPS version. This lamp is gaining popularity amongst users and lighting engineers, as it offers a high lumen package with good lighting control in efficient reflector systems.

surface mounting with glands, providing versatile installation methods.

The BEKA VAPOURLINE can be supplied in various versions from 1 or 2 lamp, 600mm to 1500mm with either T5 or T8 lamps and 110 Volt to 230 Volt electronic control gear.

This luminaire’s robust corrosion-resistant housing and diffuser make it an ideal application in industrial environments, as well as in mining, public buildings, and in any other damp and corrosive environments.

large areas, without causing glare to the neighbourhood, something which environmentally-concerned lighting designers are trying to avoid.

Its typical use is in high-mast lighting applications, which would have been traditionally equipped with 6 x 1000W HPS conventional floodlights on 40m high masts.

BEKA recommends a configuration of 9 x BEKAMAX-F 600W floodlights on a 40m mast to achieve optimum spread at minimal glare, thus resulting in a

The use of the BEKAMAX floodlight reduces not only light pollution, but also saves energy due to its highly efficient reflector system.

The main characteristic of this floodlight is its vertical beam distribution at 67 degrees, when the luminaire is positioned horizontally. This allows the lighting of

significant energy saving. The total-cut-off angle in this configuration will be at 90 degrees from the downward vertical.

The 600W version, which houses the control gear in a remote stainless steel box, attached to the stirrup, can also be used in various sports lighting applications, such as hockey, tennis, netball, etc.

B E K A - L I G H T I N G N E W S , V I E W S A N D R E V I E W S

SUFFIX DESCRIPTION/ EM 6050 EMERGENCY VERSION MAINTAINED, 1H (FOR ONE LAMP PER LUMINAIRE AT

50% LIGHT OUTPUT)/ EM 30100 EMERGENCY VERSION MAINTAINED, 1/2H (FOR ONE LAMP PER LUMINAIRE

AT 100% LIGHT OUTPUT)/ SW SWITCH-START CONTROL GEAR

BEKA VAPOURLINEINDUSTRIAL CORROSION-RESISTANT

FLUORESCENT LUMINAIRE

VAPOURLINE

BEKA VAPOURLINEINDUSTRIAL CORROSION-RESISTANT

FLUORESCENT LUMINAIRE

VAPOURLINE

ORDERING DATA

BEKA (PTY) LTD - SOUTH AFRICAMANUFACTURERS OF LUMINAIRES AND GLASS FIBRE POLES

Standard colour: Light Grey, based on RAL 7038

OPTIONS & ACCESSORIES

DESCRIPTION LAMP LUMEN MASS (KG)BEKA VLN 1*18W/ECG L 18W COOL WHITE 1200 1.1BEKA VLN 2*18W/ECG L 18W COOL WHITE 1200/LAMP 1.6BEKA VLN 1*36W/ECG L 36W COOL WHITE 2900 1.8BEKA VLN 2*36W/ECG L 36W COOL WHITE 2900/LAMP 2.4BEKA VLN 1*58W/ECG L 58W COOL WHITE 4600 2.2BEKA VLN 2*58W/ECG L 58W COOL WHITE 4600/LAMP 2.1

BEKA VLN 1*14W ECG - T5 T5 14W COOL WHITE 1200 1BEKA VLN 2*14W ECG - T5 T5 14W COOL WHITE 1200/LAMP 1.5BEKA VLN 1*28W ECG - T5 T5 28W COOL WHITE 2600 1.7BEKA VLN 2*28W ECG - T5 T5 28W COOL WHITE 2600/LAMP 2.3BEKA VLN 1*35W ECG - T5 T5 35W COOL WHITE 3300 2.1BEKA VLN 2*35W ECG - T5 T5 35W COOL WHITE 3300/LAMP 2

BEKA VLN 1*24W ECG - T5 T5 24W COOL WHITE 1750 1BEKA VLN 2*24W ECG - T5 T5 24W COOL WHITE 1750/LAMP 1.5BEKA VLN 1*54W ECG - T5 T5 54W COOL WHITE 4450 1.7BEKA VLN 2*54W ECG - T6 T5 54W COOL WHITE 4450/LAMP 2.3BEKA VLN 1*80W ECG - T5 T5 80W COOL WHITE 6150 2.1BEKA VLN 2*80W ECG - T5 T5 80W COOL WHITE 6150/LAMP 2

BEKA (PTY) LTD, 13 West View Road • P.O. Box 120, Olifantsfontein 1665, South Africa Tel: +27 (0)11 238-0000 • Fax: +27 (0)11 238-0180e-mail: info@beka.co.za • website: www.beka.co.za

2008 /9

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BEKA has created a new quality fluorescent highbay, the BEKA T-BAY.It is specifically designed for surface-mounted applications in industrial or commercial areas and is available in a four lamp version operating 54W and 80W T5 lamps in a narrow and medium beam distribution.

BEKA T-BAY, a quality fluorescent highbay

This ensures flicker-free lighting and provides instant cold and hot starting, which makes them ideal to be operated on stand-by generator or UPS circuits.

The luminaire has a most efficient reflector system of over 90% efficiency.

It is also available with a clear acrylic lens

for applications requiring an enclosed luminaire, providing an IP54 protection rating.

Access to the control gear is possible by removing two of the reflectors in the multi-reflector system.

The BEKA T-BAY bears the SANS 60598-2-1 safety mark.

This highly efficient highbay offers the ideal lighting solution for warehouses, factories, or workshops.

The BEKADAZZLE 120W CFL is most appropriate in large commercial installations operated on standby generator circuits, to ensure the safety of their clients.

These luminaire versions are available immediately from BEKA.

Expanded range of BEKA products for high powered 85W and 120W CFL lampsThe quality, quantity and reliability of emergency lighting have become a concern and focus for electrical engineers and lighting planners over the past months. In public spaces, indoors or outdoors, where at times hundreds or even thousands of persons could congregate, a reliable light source, operated in a reliable luminaire, becomes a necessity.

These CFL lamps are available in different colour temperatures, of 3000 and 40000K. This makes it most suited to become a complementing light source in an installation, which has to blend with a Metal Halide installation.

These lamps have a powerful lumen package of 9000 lumen (120W CFL) and

BEKA has, for this purpose, expanded its range of luminaires with a most contemporary light source, namely the 85W and 120W Compact Fluorescent lamp (CFL).

The advantages of this light source are compelling:

They offer instant cold and hot re-strike. This makes this version perfectly suitable to be connected to UPS circuits. No inrush currents have to be considered neither at cold nor hot re-strike conditions.

They are operated by electronic control gear, which ensures flicker-free, constant lamp output at varying voltages as well as temperatures.

These lamps are now available in BEKA’s products, such as the BEKAMAX 120W CFL, which is a model range incorporating area, floodlight or wall-mounted up- and downlights.

6000 lumen (85W CFL), resulting in a luminous efficacy of 70 to 75 lm/W.

It provides an average life of 20,000 hours, as per the lamp manufacturer’s documentation.

The lumen output range is available over a wide temperature range of between +50C and +700C. This makes it perfectly suitable for interior and exterior applications.

This addition is particularly relevant for the BEKAMAX-W version, which is popular for lighting large interior spaces as a wall-mounted up- or downlighter.

The BEKABAY 120W CFL is most appropriate in industrial applications where reliable instant striking and flicker free light sources are required.

BEKAMAX 120W CFL BEKADAZZLE 120W CFLwith open 465 ReflexorBEKABAY 120W CFL

B E K A - L I G H T I N G N E W S , V I E W S A N D R E V I E W S

Public Lighting Networks - how to reduce energy consumption!In view of the energy crisis with which South Africa is currently faced, BEKA (Pty) Ltd organised a one-day seminar titled: “PUBLIC LIGHTING NETWORKS - HOW TO REDUCE ENERGY CONSUMPTION!”, which was held on the 3rd of March 2008 in Midrand, Gauteng, South Africa and subsequently Gaborone, Botswana, and Mbabane, Swaziland.

The conference in Midrand was attended by 160 persons from all over the country, with representatives from all major Councils and Electrical Consulting Engineering offices.

The proceedings were opened by the Manager of the National Energy Efficiency Agency, Barry Bredenkamp, who presented an overview of current government programmes to fast-track the implementation of energy efficient streetlight luminaires.

2008 / 10

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New System to be introduced for Luminaire EfficiencyBy Murray Cronjé - Applications Manager - BEKA

INTRODUCTIONWith Eskom’s generation capacity in short supply and with electricity tariffs likely to increase even more, it is imperative that new building projects must squeeze all the lighting energy out of every kilowatt consumed. Today’s lamp and ballast innovations help to achieve this, but lighting specifications should ensure that the luminaires which use these lamps and ballasts also maximize the buildings energy investment in the long run.

Thus, the SABS’s lighting sub-committee S64C have decided to initiate a proposal to amend SANS 475 to include the measurement and calculation of the luminaire efficacy rating (LER) and to create a working group (WG) who will come forward on how to implement LER values and what the minimum LER values should be for different types of luminaires.

By adding LER to their specifications, lighting professionals can ensure energy efficiency in their designs and educate their clients about lighting project energy consumption.

THE PURPOSE OF LERTo establish a luminaire efficacy rating (LER) based on rated Lumens per Watt, in place of an efficiency rating based solely on either coefficients of utilization or luminaire efficiency, or total light output ratio (TLOR). The word “rated” is used so as not to require the use of absolute photometry and to be able to use published rated lumen values. LER is calculated using both ballast factor, when applicable, and total input Watts to establish the rated efficacy of the luminaire. (LER is given in rated Lumens per Watt.)

THE FORMULA FOR DETERMINING LERLuminaire efficacy rating (LER) shall be calculated for a given luminaire by the following formula: LER = (TLOR x LO) / WATTS INPUT, for Incandescent Luminaires LER = (TLOR x LO x BF) / WATTS INPUT, for Discharge Luminaires

Where: LER = Luminaire efficacy rating, expressed in rated Lumens per Watt. This value shall be expressed as a whole number, rounding up (> 0.5) or down (< 0.5) as required. TLOR = Luminaire’s total efficiency, expressed as a two-place decimal, rounding up (>0.005) or down (< 0.005) as required. LO = Total initial lamp lumens which is the total number of lamps in the test luminaire multiplied by the published rated initial lamp lumens. BF = Ballast factor of test ballast or the average ballast factor of test ballasts used in the photometric test. WATTS INPUT = Total Wattage of the luminaire as measured during the photometric test.

A LUMINAIRE’S “MPG”LER is similar to the kilometers per liter rating for motorcars and includes all components of the luminaire system.

BEKA’s presentations covered all relevant technologies, which assist the country to find a sustainable and economical solution in reducing energy consumption of streetlights. They also covered technology aspects such as solar-powered luminaires, Voltage Reduction devices, Telemanagement and the problems related to HID light sources on generator-powered circuits.

Luminaire technologies were discussed, such as conventional ballasts versus electronic ballasts, Power Switch and Timed Power Switch, as well as Reflector technologies, which were supported by case studies.

Lamp technologies were presented by OSRAM (Pty) Ltd, which included updates on High Intensity Discharge lamp technology, CFL lamps and LED lamps.

All available Lighting Control Technologies were presented and discussed, as well as

BEKA’s expanded range of energy efficient lighting products.

BEKA also provided an update on Statutory Standards & Regulations, which include the Revisions to the national Standards of South Africa, SANS 10098-1

B E K A - L I G H T I N G N E W S , V I E W S A N D R E V I E W S

DALI is not a product, nor manufacturer specific technology. DALI (Digital Addressable Lighting Interface) is a protocol, or language, as set out in the technical standard IEC 62386.DALI is a dedicated protocol used purely for lighting control, and therefore is not designed to control other systems, nor replace a building management system (BMS).

DALI is effective for scene and group-based lighting control as well as incorporating two-way communication for feedback regarding faulty lamps and control gear. This is useful where remote supervising, service and energy reports are required.

DALI Basics• Simple two-core low voltage control cable (control signal voltage is between 22.4 and 9.5 Volts)

• Each DALI dimmable Electronic Control Gear is assigned a unique address

• Maximum of 64 addresses per control circuit

• Individual or group control through addressing or broadcast messaging (e.g. ALL OFF)

Available programmable parameters also include setting the Maximum Level, Minimum Level, Dimming Fade Time and Dimming Fade Rate. This allows the ability to customise each component of an installation, or the entire installation, to create the required mood or effect required.

DALI is ideal for boardrooms and functional areas where scene selection and group-based dimming are required. Function rooms with variable layout configurations also benefit from the addressing ability of DALI, which negates the need to rewire luminaires with each change of lighting requirement.

2008 /11

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WHAT IS DALI?- quick facts

It is a single figure that expresses luminaire efficacy, the luminaires light output divided by the input power.

Actually, comparing the LER of two luminaires is not as simple as comparing the fuel consumption on motor cars, because fluorescent luminaires for example, come in several major categories. Thus, when the WG make their proposal for minimum LER values, these should distinguish between the chief categories of luminaires: fluorescent, commercial downlights and HID industrial luminaires, and the major categories within each.For example, in the USA they use the following categories:

Fluorescents:• 600x1200mm lensed recessed, 2-4 lamps, S/Hm > 1.1, and a specific UGR• 600x600mm lensed recessed, 2-3 CFL lamps, S/Hm > 1.1, and a specific UGR• 600x1200mm louvered recessed, 2-4 lamps, S/Hm > 1.1, specific UGR, shielding angles <22, 22-29, >30• 600x600mm louvered recessed, 2-4 CFL lamps, S/Hm > 1.1, specific UGR, shielding angles <22, 22-29, >30• Surface mounted plastic wraparound, 2-4 lamp, width <230mm, 230-305mm, >305mm• Commercial open fluorescents, 1-2 lamp 1200mm, 1-2 lamp 1500mm• Industrial fluorescents, 2 lamp 1200mm, 2 lamp 1500mm

Downlight luminaires:• Open reflector systems, all lamps, shielding angle <40, >40• Baffled optical systems which are at least 75% light absorbing, all lamps, shielding angle <40, >40• Lensed optical systems, all lamps, shielding angle <40• Louvered optical systems, all lamps, shielding angle <40, >40

HID industrial luminaires:• Open luminaires, ULOR 0%, <10%, <20%, >20%, 150-400W, 400-1000W, >1000W• Enclosed luminaires, ULOR 0%, <10%, <20%, >20%, 150-400W, 400-1000W, >1000W

Minimum LER values are then published for all these different categories, for example, an open 400W high bay luminaire with 0% upward light will have a minimum LER of 50, whereas the equivalent closed one will have a minimum LER of 45. As the upward light efficiencies increase, so the minimum LER values also increase.

CONCLUSIONLuminaire Efficacy Rating (LER) shall be specified as a minimum value, a value which cannot be lowered by changing the type of applicable lamp after original installation. The input Wattage used in the LER calculation should be the rated input Wattage for the ballast that is used in the manufacturers’ standard product offering. Obviously, the concept of LER can be misused because a bare lamp will produce the highest LER value. Thus, the WG who have been appointed to investigate the implementation of LER and minimum values will have to ensure that their proposals make provision for mechanisms which will prevent the misuse of LER values.

Although the proposal, which is currently being circulated, to amend SANS 475 is to measure and calculate the LER values for all luminaires, it is foreseen that in the short term the use of LER values for street lighting and floodlighting luminaires will not be implemented.

& 2 and ARP035 and the basic differences between CIE 140 and CIE 30.2 calculation methods.

The latest technological invention of the Schréder group, the MEMPHIS system, was presented and demonstrated to show

how road and highway lighting could be made more energy efficient.

Finally, all participants received a copy of the most advanced streetlighting calculation software in the world, the ULYSSE lighting software.

With this powerful software tool, which was demonstrated by BEKA’s Applications Manager, the most efficient luminaire and pole configuration can be calculated.

The presentations can be downloaded at http://www.beka.co.za/node/297

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