Results - EnLight project

Energy efficient and intelligent lighting systems


Enlight has achieved its goals by improving the energy efficiency of the light sources (i.e. electrical efficiency of LED drivers and power supplies, optical efficiency and thermal efficiency) and by improving the intelligence of the control system, providing the right light, in the right amount, at the right place, at the right time.

Enlight has shaped breakthrough innovations in the following areas:

1. Fully distrubuted intelligence

Enlight has explored a novel, distributed rules-based Intelligence system allowing each individual luminaire to make lighting decisions based on presence, occupancy events or ambient light information detected by its own integrated sensors, or events and information from other (sensor,  luminaire or user control) nodes in the network.  Enlight has developed EnLight defined few additional Zigbee cluster libraries to enable that.

Distributed intelligence enables deep energy savings with optimal user centered comfort. Without the need of a central controller, it reduces installation and commissioning effort and increases robustness, flexibility & scalability over lifetime.

2. Digital modular luminaire architecture

EnLight has developed a Plug-and-Play intra-luminaire bus architecture and communication protocol for developing and managing a portfolio of re-usable and easy-exchangeable luminaire building blocks (‘Lego for Luminaires’). These building blocks include LED light engines, embedded sensors, high- and low-power supplies, and embedded controllers.

Specific technologic innovations include compact multi-channel LED drivers and power supplies with high electrical efficiencies (upto 90..95%) over the whole dimming range, electronic designs for low standby power, cost effective embedded sensors (ambient light, occupancy, ambient temperature), Led Light Engine designs for high LOR (Light Output Ratio, upto 90%) and high thermal efficiency.

3. DLT for compatibility with existing installations

In legacy installations where it not desired or possible to change completely to a new wired or wireless system,  DLT (Digital Loadside Transmission Lighting protocol) has been developed, which allows flicker free and deep digital dimming (without rewiring existing installations) as well as colour and colour temperature and group control.

The validation results from 3 representative Office and Hospitality pilots realized in the project confirm the significant energy savings of 45..70% with equal or even increased user comfort. This result well exceeds the energy reduction target of 40% beyond LED retrofit systems.

Energy savings amounted to 30% compared to the state-of-the-art LED Office solutions and exceeded the world class building energy performance benchmarks (LEED 18 credit pnts, ASHRAE 90.1, Title24, EN15193).

The validation results from Power Grid Effects Demonstrator (e.g. power factor, main impedance and power grid losses tests) show that, in general, they are according to the reference norms (IEC 61000-4-7, EN 50065-7).

Enlight Office demonstration video (Philips)

More Office and Hospitality demonstration videos are available here