A bright idea for wasteful office lighting

March 26, 2010, 7:57am PDT | Length: 00:02:41
Commercial office buildings are one of the main culprits of the current climate crisis. They consume large amounts of electricity and release excessive carbon emissions into the atmosphere. Adura Technologies has developed a mesh-based lighting system that is reducing costs and consumption inside buildings. The technology consists of wireless radios that plug into florescent light fixtures giving employees more control over their personal lighting space. Adura has also created a dual motion sensing-personal control system that is being used at UC Berkeley that allows students to break the hard-wired connection and control their lighting from their desktop PCs.

Transcript

A bright idea for wasteful office lighting

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>> Sumi Das: Ah, the city skylight. A nice sight to see on an evening stroll, but those illuminated office buildings are also one of the main causes of the current climate crisis, wasting large amounts of electricity and releasing excessive carbon emissions into the atmosphere.

>> The problem really is a lot of these buildings are set where they only know where the breaker panels are, you know, this mass lighting, and they have no way to control it.

>> Sumi Das: One innovation hitting the market is a new lighting system that allows building managers and workers more control over their day-to-day lighting usage. San Francisco-based Adura Technologies is developing the platform. The idea is that no longer does an entire floor of lights need to be turned on.

>> We can control lights in specific areas, put them at different levels, and that granularity allows all kinds of possibilities.

>> Sumi Das: The way it works, the lights are connected using wireless radios.

>> That radio inside the fixture can communicate with the other lights in the building as well as with the, the Internet, and that radio controls a switch in the fixture. So by installing this device in the fixture, we're breaking the connection between the wired circuits, how lights are typically controlled, and allowing them to be controlled however we want to control them, independent of how they're wired.

>> Sumi Das: Users can then control the lights remotely or from a wall switch via an Ethernet connection. Adura says it's more cost effective and doesn't require an extensive building retrofit because the lighting system is not hard wired into the infrastructure. The technology was originally created by researchers at UC Berkeley, and at the university, there are various demos running the technology. One application is at the school's architecture studio where students tend to work 24 hours a day. The system is a dual, personal-control, and motion-sensing system.

>> These devices are now connected with a motion sensor so that in specific areas and individual studios, when people are working there, we can control the lights according to the occupancy. Important thing about our system, though, is we also have a switch in the wall, and our system allows the integration of, of individual personal control and the automated motion control. So if the students want the lights on when the motion sensor doesn't think they should be on, they can turn them on. If they want them off, they can turn them off.

>> Sumi Das: Adura's goal is to connect these lights to a central web hub so that ultimately building managers can control, track, and monitor their own energy usage. After all, you can't control what you can't measure, an adage that Adura stands by. For ZDNet, I'm Sumi Das.

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RE: A bright idea for wasteful office lighting
srshyamsunder2005@... 29th Mar 2010
Looks like a practical way of saving power using hi-tech
means. Shyam
0 Votes
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Saving power by using power
t0cableguy 29th Mar 2010
I have examined many of these products, such as occupancy sensors, lighting relay systems, and they fail to address a major problem. Phantom Power.
The reason panel controlled lighting is successful is that it only requires one single point of control, reducing phantom power due to the reduction of constantly powered items. This device will use power whether the light is on or off, while one of these panels is cost effective, many of these wirelessly controlled items will increase this consumption. Whats .5 watts multiplied by 1000 light controllers.. oh.. 1000 watts, and thats being conservative of the power use of the device. While this does save power because it is there controlling the lights, it increases power consumption due to its own need for power. This system would be best used in a small scale building and not a huge office building.
National electric code states that there is a limit to the number of lights on a circuit, I am fairly sure it is 16 lights. While 16 lights is enough to light a large room, it would be odd for that room to be controlled separately. The circuit breaker systems that control commercial lighting can separately operate these circuits on command, and a occupancy sensor surely exists that will send the on or off signal to the panel.
I wonder how much power this specific system will use use to operate on a large scale. Many wiring practices do not encourage turning these occupancy sensors off themselves when the light switch is off at the wall, therefore these systems may save a portion of power, but eventually mass use of these systems will end up wasting power themselves.
And by the way. Occupancy sensors have existed for a long time. I myself have installed many in various office buildings over the past few years. The issue is the skill of the installers to adjust them or place them so they are not falsely triggered and do not turn off during long periods of still office work, or the engineers ability to properly account for their use in electrical plans. Another downfall is their longevity. These are sensitive devices and they can easily be damaged by a careless worker throwing something at a ceiling.
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RE: A bright idea for wasteful office lighting
srshyamsunder2005@... 29th Mar 2010
Looks like a practical way of saving power using hi-tech
means. Shyam

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