Navigant Research Blog

Wireless Bulbs Offer Connected Light Controls

— October 20, 2014

Homeowners around the world have begun to transition from incandescent and compact fluorescent bulbs (CFLs) to more efficient and higher quality light-emitting diodes (LEDs).  Navigant Research’s report, Residential Energy Efficient Lighting and Lighting Controls, forecasts that LED sales for residential applications will increase at a compound annual growth rate of 17.6% through 2023.  Within this wholesale shift of lamp types, however, is another trend with far-reaching implications.

More and more  LED light bulbs are being sold with integrated wireless connectivity.  Instead of being controlled with simple switches, or even physical dimmers, these bulbs connect to the Internet, often through the homeowner’s Wi-Fi network, and can then be controlled through applications on a computer or smartphone.

This capability may seem extravagant , but the trend is picking up steam surprisingly quickly.  One of the first entrants to the category of wireless light bulbs was the Philips Hue, launched in October 2012.  Since then, nearly all of the large lighting companies have launched products in this category, including OSRAM, GE, Samsung, and LG.  In total, 18 different wireless light bulb products are available from 16 different manufacturers, including Greenwave Systems, Leedarson, LIFX Labs, Belkin, Fujikom, Whirlpool, and others.

Mood Lighting

These products come with a large range of features.  All are capable of dimming, while only some are able to change color (Philips, LIFX Labs, OSRAM, Tabu, Fujikom, and Environmental Lights).  Through various software applications, the lighting can be modified based on the time of day, weather conditions, or any other user preferences.  Lighting can also be tied into other home systems, such as the Philips Hue’s ability to connect with the Nest Protect smoke detector and flash red lights when either smoke or carbon monoxide are detected.  The Hue even allows lighting to be modified based on programmed sequences as an audio book is being read to provide a fully immersive scene for the listener.

Wireless bulbs come with a significant price premium over their non-connected counterparts.  While outlets such as The Home Depot have begun selling standard A-type LED bulbs for under $10, wireless bulbs are priced between $30 and $60 apiece.  As this premium comes down, and as more users become interested in the range of possibilities made available through connected lighting, adoption is expected to increase rapidly.

 

Lighting Innovation: Not Just LEDs

— July 23, 2014

Attendees at the LightFair convention in Las Vegas could be excused for thinking that the show was exclusively focused on LEDs and that LED lighting has already taken over the vast majority of the market.  Surveying the convention floor, new LED products were on display in every direction, and even the big traditional lighting companies seemed to only be showcasing their LED offerings.

Ones to Grow With

However, while LED lighting is starting to represent the majority of sales in some applications, such as street lighting (see Navigant Research’s report, Smart Street Lighting), many other applications, such as office lighting, are still monopolized by older lamp technologies and are only beginning to see competitive LED products.  Moreover, some companies are devoting R&D dollars to develop new non-LED products, and there will certainly be a role for those products to play in a future that will be largely, but not completely, taken over by LEDs.  A few examples of companies that highlighted non-LED products at LightFair are:

  • Indoor Grow Science (IGS) – This company had a much visited display of its high-pressure sodium (HPS) grow lights, which feature a patented method for venting waste heat so that it does not negatively impact plant growth.  A company representative explained that while IGS is working on LED-based grow lights, there are a number of challenges involved that its officials believe will leave the indoor agriculture industry using HPS and metal halide lamps at least for the near future.  Heat dissipation still has to be managed with LED lamps.  In addition, plants require UV-A and UV-B light, which standard LEDs do not supply.  While UV LEDs are available, they generally degrade faster, which could leave a grower with a light that looks operational to the eye but is not meeting the needs of the plants.
  • Luxim – Having made a splash at LightFair 2013 with impressive demonstrations of its light-emitting plasma (LEP) technology, Luxim impressed again this year with the launch of its Resilient brand of industrial-strength products that include LEP, LED, and induction-based lamps.  While LEP lamps have a tiny market share, this company makes a strong case that they can be the right choice in applications that require very bright lights, especially those that benefit from a small point source of light.  Another advantage is a lack of any flicker, which allows for the use of very high-speed photography in sporting and other applications.
  • Genesys – While not an official LightFair vendor, this company’s representatives were busy at the conference making the case for their gHID ballast.  As opposed to typical HID ballasts that operate at a frequency of 50 Hz  to 60 Hz, the Genesys product runs at over 100,000 Hz, increasing efficiency to be comparable to LEDs, as well as extending both lamp and driver life by factors of 2 to 3 times and 3 to 4 times respectively.  The gHID ballast is largely being sold as a retrofit product, where it can often fit inside existing luminaires or be attached outside of them.  Therefore, it does not require the complete infrastructure change that many LED retrofits involve.  In the longer term, the company sees its product as complementary to LEDs, providing a solution for applications where LEDs may not be as successful such as higher wattage lights.

While these companies showcased innovative non-LED products, the leadership of LEDs at LightFair 2014 would be hard to deny.  Out of 27 entrants for the innovation awards in the commercial indoor category, all 27 were LED-based.  Other lamp types may maintain sizable portions of the installed base for years to come and may continue to make sense in certain specific applications, but it’s undeniable that the age of the LED is upon us.

 

Li-Fi Turns Light into a Data Stream

— July 13, 2014

Since Harald Haas demonstrated the ability of light-emitting diode (LED) lights to transmit data during a TED Talk in 2011, the promise of Li-Fi (short for light fidelity) has received a lot of attention.  As researchers develop faster and faster communication speeds, the application of the technology to the building space appears both realistic and attractive.  Commercially, General Electric (GE) has demonstrated the viability of the technology through its launch of LED-based communication for retail environments.  Li-Fi could be cheaper and consume less energy than existing wireless communication technologies that rely on radio frequencies (RF).  Smart buildings, which require a dense and flexible control network, present an interesting application for a Li-Fi deployment, particularly with the increased adoption of LED lighting.

Non-Interfering

Li-Fi seems to be a compelling alternative to the RF technologies that are currently in use today.  First, the RF available to building automation is crowded.  Moreover, as the Internet of Things becomes more pervasive, more and more communication nodes will further saturate the environment.  RF travels through walls.  So, a node in an adjacent room will be competing for detection.  But Li-Fi is impervious to this problem.  Since the range of any individual Li-Fi node extends only to the nearest wall, the communication in one room will never interfere with other communication in a different room.  In other words, the inherent limitations on Li-Fi range are an ideal solution for saturated networks.  Moreover, more than just crowding, interference from microwaves and other devices can be a problem, particularly in medical environments.  Li-Fi is immune to RF interference.

Security is another area of concern for wireless communication.  It’s relatively easy to hack a Wi-Fi network.  Li-Fi, on the other hand, has a shorter range and requires line-of-sight.  As a result, it is inherently more secure.  You have to be within the range of the transmitter and receiver, shifting the threat of IT security to more manageable physical security.

The Bad News

The technology faces some serious technical challenges before widespread adoption, though.  In addition to enhancing security, the line-of-sight requirement also presents challenges.  Though Li-Fi is immune to RF interference, it is susceptible to interference from a more ubiquitous source: the sun.  Receivers placed close to windows could be rendered ineffective.  Additionally, lighting in buildings is typically designed to be unidirectional, from the light source to the space to be illuminated.  But communication networks must be bidirectional to both send and receive data.   In order to create a Li-Fi network, lights would need to be installed to point at each other, which is at odds with their intended functionality.

Despite these drawbacks, Li-Fi could overcome several of the barriers facing wireless.  Though most of the current buzz focuses on visible light communication, using infrared light could solve many of the hurdles.  Windows can be designed to block infrared light but allow visible light to pass, eliminating problems of solar interference.  Infrared also has greater potential throughput of up to 5 to 10 gigabits per second.  Overall, the challenges facing Li-Fi are no greater that the challenges facing RF.  The technology appears to be several years away from successful deployment in building automation.  But it’s coming.

 

Lighting Systems Seek Simplicity

— May 6, 2014

Many of the barriers to broader adoption of intelligent lighting control systems are quickly being overcome.  Lower prices for light-emitting diodes (LEDs), which are an excellent fit for intelligent controls, are leading to wide-scale replacements with that lamp technology.  The price for the control systems themselves has also come down dramatically, especially for wireless communication systems that remove the need for potentially costly rewiring work.  The lack of open standards – another previous barrier to lighting control systems – has also been largely addressed by a range of protocols that allow customers to choose one company’s luminaries, another company’s sensors, and perhaps even a third company’s controls with less fear of incompatibility.

One of the largest remaining barriers in this market is complexity.  The complexity of networked and smart lighting control systems limits adoption at every stage of a lighting project.  Architects, engineers, and lighting designers must be well-versed in the technology and the available options in order to select and design a system to fit a given project.  Networked controls also often require a specialist for installation, rather than simply an electrician.  Finally, building owners and managers must be trained in the operation of complex systems and have reasonable concerns that any problems or required changes could become costly.

Click Here

Lighting controls companies are well aware of the complexity problem and have released a slew of solutions to help reduce the obstacle.

Cree launched the SmartCast system in February, which allows luminaries enabled with the technology to automatically connect with each other to form a control network that attempts to maximize energy savings based on conditions in the space.  The setup involves the touch of a single button, a feature that Cree has trademarked as OneButton.

Enlighted offers intelligent sensors designed to be connected to individual luminaries, packaged with the local intelligence to control the light based on occupancy, available daylight, and even the type of work being done in the area.  These controllers can communicate back to gateways so that lights can be remotely monitored and managed.  However, by building the sensors and intelligence into each luminary, Enlighted has removed the need for groups of luminaries and sensors to coordinate with each other.

Auto-Lit

Daintree Networks addresses the complexity problem through an emphasis on open standards, so that its control system can work with lighting products from multiple manufacturers and customers can more easily mix and match products from various companies.  The company also describes its mesh communication network as self-healing, meaning that any disruption to communications is automatically rerouted.

These companies and many more are trying to address the problem of complexity in lighting controls.  A scan of company websites from Philips Lighting to Acuity Brands to Cooper Industries include words and phrases like “simplify the installation,” “quick-configured,” and “design freedom.”  Simpler systems will help convince building managers that they can achieve the benefits of energy savings and improved monitoring without the risks of complicated reconfigurations or incompatible equipment in the future.  And, in the majority of small- and medium-sized buildings that have no dedicated manager, lighting control systems that configure and run themselves without any intervention must be made available.

 

Blog Articles

Most Recent

By Date

Tags

Clean Transportation, Electric Vehicles, Policy & Regulation, Renewable Energy, Smart Energy Practice, Smart Energy Program, Smart Grid Practice, Smart Transportation Practice, Smart Transportation Program, Utility Innovations

By Author


{"userID":"","pageName":"Smart Lighting","path":"\/tag\/smart-lighting","date":"10\/23\/2014"}