Sparks Electrical News September 2015

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sparks
ELECTRICAL NEWS september 2015
lighting 23
Addressing the challenges of LED lighting
THE brightness levels of today’s LEDs are open-
ing the door for the use of LEDs in general light-
ing applications that require high lumen output
levels. Building an LED-based luminaire poses
a new set of technical challenges, among them
new optical requirements, providing adequate
thermal management for stable operation and
dealing with the ever-improving performance of
LEDs. Nevertheless, LED technology also offers
an unknown wealth of possibilities, providing
access to unprecedented levels of performance
and newways of integration.
OSRAM’s PrevaLED family of LED light engines
addresses the challenges of LED-based
lighting while providing users with great
performance and flexibility at the same
time. Enabled by the application of LED
technology, PrevaLED aims to push the
envelope of what is possible in terms of
performance and simplicity.
The PrevaLED Flat AC series of light
engines is ideally suited for use in highly
diffuse wall-mounted and ceiling-mounted
luminaires in decorative, hospitality or
domestic applications.
OSRAMPrevaLED Flat AC
PrevaLED Flat AC light engines have
been developed for decorative diffuse
luminaires that can be used in demand-
ing traffic way applications in buildings
that require functions such as emergency
lighting. It is the first range of LED engines
specifically designed tomeet all necessary
requirements for such traffic way applica-
tions inbuildings:
• Power-on-board: for simple integration
as well as novel thin luminaires.
• L-EM (local emergency) and C-EM (cen-
tral emergency): for local and central
emergency operation.
• Master/slave interface: to control up to five
slave luminaires on one master luminaire.
Products benefits
• Optimal design for low profile luminaires with
high uniformity.
• High systemefficacy up to 123 lumen per watt
and simple thermal management.
• High reliability through overheating protec-
tion.
• Touch protection accessory for ‘LEDifying’ of
existing luminaires.
Areas of applications
• Corridors, stairways, entrance ways.
• Hospitality: hotels, restaurants.
• Public, commercial and office buildings.
• Secondary rooms: garages, storage.
Technical features
• Rated luminous flux: typically 1 500 lumen,
2 300 lumen and 2 500 lumen.
• Light colours: warm white (3 000 kelvin),
cool white (4 000 kelvin).
• Colour rendering index: typically 83.
• Diameters: 170 and 240 mm.
• Operation with mains voltage: 220 – 240 V;
50/60 Hz.
Enquiries: +27 11 207 5600
TRIDONIC has launched the third generation of
the TALEXXengine Stark SLE LED light engine –
more cost-effective andmore efficient. Genera-
tion three provides up to 80% higher luminous
flux, greater efficiency under real-life conditions
(up to 125 lm/W at 4 000 K) and better hot lumen
efficiency (up to Tp = 85 °C). Even after 50 000
hours of operation the third generation achieves
a life of up to L90. At the same time the modules
are matched to the new Eco andTop series of
TALEXXconverters and together constitute an
optimum system.
With the new LEDmodule, Tridonic is present-
ing itself as a competent system supplier for
professional lighting solutions based on chip-on-
board (COB) light sources. Thanks to a new COB
design with improved thermal properties, more
efficient LED chips and perfect matching with the
appropriate converters, the Classic, Select and
Mini modules achieve even greater efficiency
at lower costs. Up to 4 800 lumen can now be
emitted from a LES 19 (light emitting surface).
There is also a new operatingmode for the Classic
and Select modules, known as best LED opera-
tion (BLO). This ensures an ideal balance between
efficiency, lifetime and costs. The lumen package
is automatically configured when the LEDmodule
is connected to the converter. The luminous flux
remains constant at all times, even if the colour
temperature changes.
Enquiries: +27 11 923 9686
Cost-effective third
generation LED light
engine