Digital & Addressable Lighting Control at Indoor Games Hall

Digital and Addressable Lighting Control at Kowloon Bay Indoor
Games Hall

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.

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Energy Performance

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.