Kings College London

Integrated LED illumination and Control System for advanced energy saving and functionality

Innovation

The project utilises a LEDsmart distributed intelligence control system, designed specifically to use all the features on PhotonStar’s SmartLuminaires. This next generation system is dramatically simpler and more cost effective to specify, own and install and is optimised for maximum energy savings, functionality & scalability without the restrictions of legacy.

The power of the system lies in PhotonStar’s innovative LED Smart Luminaire dedicated embedded microprocessor, eliminating the complexities of installation and commissioning by reducing the number of components and amount of cabling required. The distributed intelligence approach is the first to permit simple “per luminaire” settings, going beyond the restrictions of conventional zoning. Occupancy and daylight sensors are not restricted to switching a single zone. LEDsmart control systems offer further energy savings through highly effective and flexible control over fade on, hold time, fade off and fade rate and off levels for each individual luminaire, set by simple dipswitch selection on install.

The SmartNemesis luminaire features LuxLoc™ technology, permitting constant levels of illumination to be delivered during the day irrespective of natural daylight contributions. Each fitting has an integral light sensor. This microprocessor based intelligence provides smooth dimming capability down to as low as 0.5%, as well as soft start strike, and seamless compatibility should the system need to be connected to a future building control system.

Conventional fluorescent luminaires become less efficient when dimmed and lamp life is typically reduced. With the innovative SmartLuminaire, this is reversed – the Smart Nemesis can precisely vary the luminous flux from as little as 11 lumens to over 2400 (delivered) lumens. When daylight sensing is enabled, efficacy ranges from 46lm/circuitW to 73lm/circuitW, continuously adapting to provide the minimum energy consumption, resulting in lower operating costs.

The controller operates at 24V DC, making the installation ready to accept power without inverter losses if a future local renewable supply (such as PV panels) is installed. The SELV (Safety Extra Low Voltage) system removes many of the installation safety concerns. Control signals are via plug and play Ethernet patch cables. The simple daisy chained distributed approach with no central controller makes it simple and cost effective to retrofit following existing power cables. Commissioning is therefore minimal with no requirement to progra

Fittings removed:

  • 33 2×26W CFL switch start (68W with ballast losses – source Osram)
  • 4 1×26W CFL switch start (34W with ballast losses)
  • 3 28W 2D Switch start (36W with ballast losses)
  • 4 1×58W fluorescent (71W with ballast losses)
  • 6 50W MR16 halogen (59 circuit Watts)

Total 3150 circuit Watts
(115 m2) 27.4W/m2
with no controls/sensors
average lamp life 4000hrs (actual – due to switch start)

Replaced by

  • 32 Laser Lite LED 10W
  • 3 x Kopi 1W pendants
  • 3 × 27W Nemesis LED
  • 1 × 18W Nemesis
  • 16 × 42W SmartNemesis
  • 4 × 7W CeilingStar5 pendants
  • 8 × 10W PhaetonLite

Total 1202 circuit Watts
(162.36m2) 7.4W/m2
with additional benefit through controls
average lamp/fitting life (L70) 80,000hrs
Savings 1948 Watts = 62%

Additional estimated energy savings through controls (daylight, occupancy) and increased efficiency when dimming = 601W (based on a conservative 50% reduction referring to the US lighting Research Centre combined saving research showing 61% average savings)
Total estimated savings with controls = 2548W = 80%

Additional Savings:
1,840 replacement lamps over 80,000 hours

Overall illuminance in the new scheme is lower as it provides improved utilisation of light. The task area illuminance averages 500lx

Render of new installation including interior designer’s design.

Environmental Responsibility

Combination of daylight sensing, and increased efficacy provides up to 70% less CO2 in operation (than previously installed CFLs without controls)

Nemesis and Laser have lowest embedded CO2 in it’s class (when compared over 50,000 hours for equivalent lux levels)

Nemesis features optimised photometry required 5% reduced number of fittings, reducing CO2 in operation & embodied.

RoHS compliant

No toxic components including sealants/resins etc.

Manufactured from 85% recycled material

Designed to be refurbished (99% reusable) locally in the UK at end of life.

100% recyclable

Thermaloc for extended life.

Emergency packs use safer NiMH batteries, rather than highly toxic cadmium cells.
Up to 85% less CO2 in operation (than previously installed halogens)

Control System Extends life of the LED luminaires, reducing embodied CO2 in the project.

Reduces energy demand/ CO2 emissions by >50% (projected) over and above efficiency savings.

Unique distributed intelligence and daisy chain 24V SELV installation requires 80% less cables and infrastructure than conventional control system, further reducing embodied CO2 in the project.

These and more images are available in larger format if required – please contact marketing@photonstarled.com. Installation will be completed 1st October and photographs can then be provided