Specifications

19
www.futureelectronics.com
TECHNICAL VIEW
rules, using data from sensors and a pre-programmed scheduling
system:
• 24 hrs per day, 7 days per week:
- If the motion detector detects presence in a room, the light
will be turned ON
- The light levels from the luminaires will be adjusted to
take into account the ambient light to deliver a constant
illumination level
- During very sunny days, some lights may be turned OFF
if the sunlight is sufficient to help generate the target
illumination level
• From 6pm to 6am and weekends:
- The schedule will set the lights to be OFF for all unoccupied
rooms and, by extension, the entire building
- The OFF state during this time is defined as the luminaires
being completely turned off
• From 6am to 6pm:
- For meeting rooms or all rooms with a closed door, if
presence is not detected, the lights will be completely
turned OFF
- For open rooms or hallways, if presence is not detected,
lights will be dimmed to 60%
Table 1 summarises how each of these rules affects the utilisation of
the LED fixtures for the described scenario:
Table 1 illustrates that implementing intelligent control according to
the scheme described can reduce the total energy consumption from
the luminaires by 40% compared to the non-optimised LED luminaire
system.
Table 2 explains the power costs incurred by the CFL system, the LED
system, and the LED system with intelligent control.
The table shows that in addition to the savings gained by using LEDs
in the downlight fixtures, which are about 61.4% when compared
to a CFL, an additional 15.4% saving is realised when these LEDs are
optimally controlled based on the scenario above. So for the end user
the additional energy savings, in addition to the LED payback and other
value-added features, may justify the initial cost of implementing the
intelligent system.
Conclusion
From controlling light systems over a wireless or PLC infrastructure, to
initiating functions via sensor interaction, adding an intelligent system
into light fixtures goes beyond simply making the product more
appealing with impressive functionality; it also provides the means to
make lighting systems more interactive, more adaptable, and - most
importantly – more energy efficient.
The example presented in this article
shows that adding intelligent control
to an LED-based lighting system can
further reduce the energy cost by almost
15% for only one room. This is indeed a
“smart” way to reduce operating costs
and meet ever-tightening regulations
governing energy consumption.
Future Lighting Solutions has created
the Intelligent Lighting Platform to
support lighting customers with a
complete range of design options. The
platform includes ICs, subsystem bricks
and turnkey modules from renowned
manufacturers such as CEL, Cyan
Technology, Freescale Semiconductor,
Philips, Synapse Wireless and Yitran. The
platform mainly leverages Synapse’s
SNAP network operating system to allow
the seamless integration of multiple
control functions and communication
over various RF ISM bands and PLC.
Table 2: Power-consumption comparison
Table 1: Energy savings using intelligent control