The New Town Kolkata Development Authority (NKDA) has started installing high-tech, smart LED street lights on a 1-km stretch at New Town that will optimise the consumption of energy by switching on, off or dimming the lights, based on external conditions, such as traffic and the sun.
The lights will use internet of things (IoT)-based, low-power, wide area network, radio frequency technology.
NKDA officials said work was on to install the smart lights on a 500-metre stretch on either side of the approach lane between Central Mall and Clock Tower in Action Area 1.
Explaining the technology, officials said it would be primarily machine-to-machine communication. The system works by means of various signals transmitted to the cloud and is remote-controlled through apps, with which each streetlight will be connected from a central control room. This technology uses small data packets, which sends out and communicate data, such as meter reading and illumination level. Officials at the control room will receive a data signal on their computer screens about the current traffic movement on a particular stretch. After a certain point of time, say 2am, when the traffic is not heavy, they can dim the lights through the remote-control apps. A device will measures the prevailing light condition. Whenever the street lights are perceived to be too dim, the controller will automatically increase the brightness.
Earlier, the NKDA authorities had connected all streetlights in New Town to automatic on-off timers to ensure energy was not wasted during the day. They now plan to install motion sensors to save power further. An official pointed out that they were working on a long-term plan, under which every third or fourth streetlight in the township would be turned off after midnight, when traffic would go down considerably. Receiving signal from the motion sensors, the lights would automatically switch on when a vehicle was detected on the stretch, he said.
Hidco Bhavan already has motion-sensor switches that turn off if no one is detected inside a particular room for more than 15 minutes. “All these steps will help reduce consumption of electricity to about 25%,” said an official.
Source: Times of India