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FEATURE LIGHTING & CONTROLS SAVING ENERGY WITH LIGHTING CONTROLS


The LED revolution in lighting is old news. Another revolution is on the horizon, and it’s potentially even bigger, according to Tony Biggs, senior manager at Lutron Electronics


an opportunity to promote higher value products and make more money. Funding is also available for


energy-efficiency projects from bodies such as Salix Finance, which provides loans to public sector organisations, and the Carbon Trust, which provides similar services to the private sector. Both allow users to pay back the upfront cost of new technology from the savings made on energy bills, which will make the system free or very inexpensive. This kind of funding can allow customers to increase the size of a project they’re investing in, or it can even make the difference between a project getting the go-ahead at all. Controls even make it possible for


businesses to earn money back from the electricity grid by automatically reducing lighting loads during peak electricity usage times. In many cases, the cost and disruption


A


ny lighting engineer will tell you that the most efficient light fixture


is one that’s not in use. That’s where the next revolution begins: lighting controls. Controls vary from simple standalone on/off switches to networked, building-wide systems. The rise of LEDs, which are essentially electronic chips, has spurred on the growth of digital controls, because LEDs require control to be properly managed, and they enable more sophisticated control of light than ever before. In fact, the market for lighting controls is forecast to grow more than ten per cent a year over the next five years. Controls represent an opportunity for


contractors to increase the scale and value of projects, and to achieve a better outcome for everyone. But, although introducing lighting controls is easier than ever, it’s an opportunity that’s often missed. Drive through any city at night and


you’ll see empty buildings with all their lights on. Energy – and therefore money – is being wasted all around us. But the technology is here to solve it. Thousands of homeowners and building


operators are already making savings from switching to LED. On top of these savings, they can also achieve substantial reductions in energy use with controls. Switching or dimming lights in response to presence detection and daylight levels,


22 WINTER 2019 | ENERGY MANAGEMENT


for instance, can save between 20 and 60 per cent of lighting energy. But before we get to dimming, it’s


worth asking whether the light level from installed fittings is correct in the first place. Many retrofit projects aim to match existing light levels – but this is not always necessary. Most offices are actually overlit. LED upgrades can end up perpetuating this. Controls can fix this by automatically


trimming off the top end of the dimming range, creating a better environment and reducing energy use for lighting by 10-30 per cent. This can save the customer money over time for electricity that they didn’t need to be using. This is an opportunity that many users won’t be aware of, and an easy way for contractors to add value. As a supplier, it’s easy to talk up the


value of long-term savings from installing or upgrading lighting and controls. But inevitably there’s an upfront cost, and if it’s too high, the project just won’t happen. But there is help. The Enhanced Capital Allowance (ECA)


scheme gives businesses tax breaks on certain energy-saving products that meet the criteria for the government’s Energy Technology List (ETL), including lighting controls. This means that businesses can get back a substantial portion of the upfront cost of a controls system through a reduced tax bill. For contractors, this is


of installing controls is a major hurdle for customers. But it doesn’t have to be this way. Many lighting control systems are now wireless and require no – or very little – new cabling. Lutron’s Energi TriPak system, for


example, uses wireless RF modules that attach to luminaires and communicate wirelessly. A variety of wireless controllers are available too, which can be placed almost anywhere. Controls are all about flexibility. If a


client’s needs change, controls mean the lighting scheme can easily adapt. For instance, if a meeting room takes on


a new purpose, if workstations are moved, or if issues with lighting become apparent after a business moves into a new space, a good lighting control system can easily adjust to fit the new scenario. Control systems also open up the


potential for clients to introduce extra features and functions in future, harnessing the Internet of Things (IoT). By incorporating sensors and intelligence into light fittings, it’s possible to track movement of people, monitor temperature, light levels and air quality, and analyse the data for the benefit of the business. The IoT is still in its infancy, but it’s going to be huge. Even if businesses aren’t ready to take advantage of it, they may want to futureproof their operations by making themselves ready for it.


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