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8.2. Energy Management

8.2.1. ZLED (ZigBee enabled LED Luminaire) [Chennai]
ZigBee is a wireless technology designed to address the unique needs of low-cost, low-
power wireless sensor and control networks.
A Zigbee controlled dimmable LED luminaire (ZLED) has been designed and developed for
providing energy efficient illumination in buildings.
ZLED is a wirelessly controlled dimmable LED luminaire with ZigBee End Device (ZED) to
control its operation. A ZigBee Coordinator (ZC) connected to the server controls the
operation of LED luminaire based on the decision taken by illumination control algorithm.
ZLED uses inbuilt PIR sensors to detect human presence in the office environment.

Key Features:
• Different levels of dimming (5% to 100%)to provide optimum illumination in work
plane
• Wireless control of light using ZigBee
• Thermally stable LED luminaire
• Web, Tablet and Mobile based GUI to monitor and control the lamps
• Occupancy prediction using Hidden Markov Model
• PIR based occupancy detection and lighting control
• Human Activity based lighting control

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