Jan 24, 2014 Lighting Design & Controls
Digital and Addressable Lighting Control at Kowloon Bay Indoor
Prepared by Martin Wu Kwok-tin
Energy Efficiency Office, Electrical & Mechanical Services Department, Hong Kong Government
Digital Addressable Lighting Interface (DALI) was developed to overcome the problems associated with the analogue 1-10V control interface for dimming of electronic ballasts. DALI is a new international standard (Annex E under IEC 60929) that guarantees the exchangeability of dimmable electronic ballasts from different manufacturers. It provides a simple and digital way of communication among intelligent components in a local system in a way that that is free of interference.
The new T5 DALI lighting system has now been operating smoothly for more than a year. The management staff of KBIGH commented favourably in the new lighting system. They indicated that it offers a number of advantages – adjustable lighting level, ability to provide lighting to individual badminton courts, a more comfortable visual environment, and considerable savings in electricity expenditure.
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Digital & Addressable Lighting Control at Indoor Games Hall
Obviously, high bay lighting using high output T5 lamps and luminaries was proved to be more energy efficient and had better visual performance than HID lamps. We are optimistic that high output T5 lamps could replace conventional high bay lighting using HID lamps in the very near future in most application with high ceiling level including sport halls, warehouses, plant rooms, exhibition halls, etc.
More Sports Halls Lighting Design Reference:
Supplemented by the advance in digital lighting control system like DALI, the T5 lighting system could also be designed to suit various dimming and functional requirements in commercial buildings via Central Control and Monitoring Systems. Optimisation of energy consumption could also be achieved by automatic dimming and switching by local daylight and occupancy sensors. Wiring cost could be reduced as both power and control wirings to individual luminaire could be connected via multiple busbars to both LV lighting circuits and building control network. Each luminaire is individually addressed and programmed to its designated lighting group, scene and switch settings. Future modification in lighting arrangements could simply be made in a computer terminal.
Jan 23, 2014 Lighting Design & Controls
The Digital Addressable Lighting Interface (DALI) : An Emerging Energy-Conserving Lighting Solution
by Odile Ronat, International Rectifier
Digitally controlled dimming of lighting is emerging as a key energy savings system in Europe and spreading to the rest of the world. The key drivers are energy shortages, increased energy costs, and environmental concerns. The Digital Addressable Lighting Interface (DALI) standard is emerging as the preferred fluorescent controlling method due to its many advantages.
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DALI – An Emerging Energy-Conserving Lighting Solution
Why DALI is Needed
Increased energy demand has been driven by an explosion in information technology and unprecedented economic growth over the past few years. The supply of energy has not increased with demand in many areas, especially in rapidly growing economies. This has led to daily outages in some areas. Europe has a strong public and government environmental awareness of the need for energy conservation. European public policies that promote conservation, including higher energy taxes, have led to high energy costs.
DALI refeerence for interior designers:
DALI controls enable increased productivity by making lighting an active part of the work environment, deliver a 20 to 30 percent reduction in energy use, reduce maintenance costs, and improves building aesthetics.
DALI provides significant advantages over existing analog control systems including:
- Two-way communications for obtaining operating status and performance of luminaries. This ability to generate reports showing location of failed lamps and additional fixture performance items helps reduce maintenance and energy costs.
- Individual fixture addressing of up to 64 addresses provides cost-effective control of individual fixtures and allows re-configuring space lighting groups without re-wiring.
- With 16 programmable scenes and groups stored in the ballast, the user can define lighting scenes based on occupant tasks while groups provide the ability to control individual fixtures included in multiple control zones.
- Control compatibility across multiple suppliers letting users to mex and match and obtain consistent control operation.
- Simple control wiring allowing maximum flexibility, ease of installation, and convenience