After stumbling across a discussion thread on AV Forum that discussed the merits of various lighting/smart home control solutions, in response to a question on who’s the best in terms of cost a technical features/benefits, I thought I should look into this a little deeper.
OK, at Ivory Egg we could be viewed as a little KNX or DALI biased, so I promise to be as objective as possible and open to feedback here. At the end of the day we are independent, simply want to deliver the best solutions to our clients and I would hope this article, at the very least, will stimulate some form of debate. You can view the complete thread at AV Forums.
So, in terms of the players (at least who I perceive to be the market ‘leaders’ in this field), and again you may disagree with my selection, I have decided to look at the following solutions. This selection is based purely on the names I come across on a weekly basis:
- KNX
KNX is a standardised (EN 50090,ISO/IEC 14543), OSI-based network communications protocol for intelligent buildings. KNX is the successor to, and convergence of, three previous standards: the European Home Systems Protocol (EHS), BatiBUS, and the European Installation Bus (EIB or Instabus). - Crestron
Crestron is the world’s leading manufacturer of advanced control and automation systems. They offer integrated solutions to control audio, video, computer, IP and environmental systems, and streamline technology to improve the quality of life for people in corporate boardrooms, conference rooms, classrooms, auditoriums, and in their homes. - Lutron
Lutron Electronics Company, Inc. is a privately held corporation that designs, manufactures, and sells lighting control systems and a variety of other related products. Its probably fair to say that Lutron lead the way in lighting control systems. - Rako
Rako provide state of the art digital dimming technology. Their innovative solutions meet the needs of a diverse range of applications by offering lighting systems that are simple to use, creative, easily installed and cost effective. - DALI
The Digital Addressable Lighting Interface (DALI) is a digital protocol for the controlling of lighting in buildings, such as electrical ballasts and dimmers. - INSTEON
INSTEON technology is a dual-band mesh topology employing AC-power lines and a radio-frequency (RF) protocol to communicate with and automate home electronic devices and appliances, which normally work independently. It is a home automation networking technology invented by SmartLabs, Inc., and was developed based on the X10 model for control and sensing applications in the home.
Not everybody active in this field, but a good starting point? Unfortunatley though, we have a bit of a problem when trying to compare these so-called competitors, as basically what we’re dealing with is a mix of different standards, manufactures and solutions that are all competing against each other. I would love to be in position to just compare like for like and publish the pros and cons of each, answer the questions in places such as AV Forum, but that would not provide a true representation of each solution (I hope I’m not stating the obvious here)…
For example, it makes sense on some projects to have a mix of KNX and DALI. As DALI is an open protocol for lighting control mainly in commercial buildings, while the growth area in KNX is for residential and LED. Take Heathrow Terminal 5, which has a KNX backbone with switches/PIRs etc and a gateway to DALI for the lighting. KNX can’t compete with DALI, as the DALI is fitted to the ballasts that control the lighting and sit in the actual light fitting. They are complimentary systems and we approach it from that point of view as we sell KNX/EIB DALI gateways at Ivory Egg.
In terms of KNX vs. some of the other systems, well Lutron is bar far the market leader in terms of pure lighting control. Rako on the other hand sell purely wireless lighting controls and they are great for DIY/retro-fit. As for INSTEON, which is again a wireless control technology, they currently have no European devices so it doesn’t really complete with KNX and is more of a competitor to the likes of Z-wave and EnOcean (which is another blog altogether). And finally we have Crestron, who supply more AV & generic device control solutions.
It is worth pointing out that Crestron do provide a complete AV, lighting and control solution. It does it by controlling different devices from multiple manufactures and a wide range of different protocols via a central controller. From a consumer point of view Crestron is “Interface Centric” via tablet and in wall touch screens. This hides the complexity of using Lutron for lighting, X manufacturer for heating and Z for multi room audio. It is an expensive route to take, but on the positive side it is highly configurable.
KNX is standard based and developed from a consumer point of view. It is switch centric, in other words it is a compact and stylish intelligent switch on the wall that can easily control the ‘functions’ in a room (HVAC, lighting, blinds etc). KNX has 1,000s of products that are certified to work together, but this is not the case with Creston. That said most consumers wouldn’t know the difference, as most simply go on look and feel, and that is where market leaders such as Basalte and Gira score highly. Their products are innovative, look fantastic on the wall and at Ivory Egg we can supply a whole host of fittings for 13amp sockets that will coordinate with the wall switches. And to be fair, this is what the architects are demanding!
So difficult to draw conclusions really. I guess the big question I’ve not really answered is what are they main differences between Lutron and KNX? As Lutron is a central processor based with proprietary technology and KNX is a component/manufacturer open standard, does that mean the KNX open standard is the lowest common denominator (as claimed by Lutron) or does that mean you get vastly increased flexibility (as claimed by KNX)? Is Lutron only lighting control – on/off/dim or is it full integration. If KNX gives you full integration, then why would you even consider Lutron? All very valid questions…
Yes, KNX provides a holistic approach to efficient energy usage. It is not limited to lighting or heating or metering or appliances or AV or any other specific function for that matter. The KNX platform has been adopted by many highly respected major manufacturers with their vast choice of products covering all these product lines. In the longer term, this is also important to building owners, as any installation is future proofed for any changes/upgrades that could be needed. As KNX covers such a diversity of applications using one standard, it means cabling networks can be much more simplistic and single twisted pair cabling can often suffice, with multiple elements all operating together on a single network. As I’ve already mentioned briefly with DALI, a number of the KNX manufacturers have also developed ‘gateways’ to other control protocols. These simple devices are used to expand the capability of KNX control systems to provide the complete solution for a building.
KNX has also worked closely with management-level protocols such as BACnet to enable a close co-operation between these two standards when the project requires additional integration. Every KNX-compliant piece of equipment is fully tested and certified to this highly stringent standard by an independent regulatory body – It is only at this point that it can carry the KNX logo, as controlled by the international KNX Association of Brussels. Therefore there is total confidence in reliability and interoperability, whatever KNX devices are chosen. In the UK we have a growing network of integrators who have joined KNX UK to share their experiences and to help promote the standard. They can also assist consultants as well as building owners in achieving the optimum solution for their building and with KNX also accepted throughout the world (and with partnership agreements with more than 30.000 partners in more than 75 countries worldwide) from China to the United States as well as Australia and the Middle East, it truly is a worldwide standard.
Lutron on the other hand is recognised as the leading brand in terms of pure lighting control, and rightly so… It has many advantages and is easy to install, retrofitable and extremely reliable. Their systems are a proven, extensively implemented technology that offers 2-way communication, is scene capable and can dim any type of dimmable lighting. All this is backed by an industry leading company with a very long history and their systems are available in a large number of styles and finishes, all backed with a 7 year warrantee. Plus they too can integrate window/shade controls and offer relatively easy intregration with Crestron and other control systems. However, while I find it hard to criticize KNX (and again, I can hold my hands up and say yes we’re a little biased), to me there are some obvious disadvantages to Lutron. For one it only controls up to 32 lights (expandable to 64). Then there is the fact it has no dedicated processor, so it relies on an automation processor. In other words if this processor fails, then I’m afraid you have to manually override or you have no lights at all. However, the ‘biggie’ (in my experience anyway) is that expansion always seems more complicated than it needs to be and is certainly more expensive than with KNX products.
The choice of lighting control is a wide one one I’m afraid, the above is only our humble opinion. To be honest, what you really need to do is decide what functionality you want and then see what systems can support your needs. Its important you select an installer that can advise you on the systems that you’re interested in. Price is always important, but do not make it the main point, and you need to always be thinking about upgrades/adding to the system in the future. Also think about who can you get to do changes and tweaks to the lighting control system (these things are never right first time and commercial clients and their staff especially can be very demanding)?Does the control system intergrate with other manurfacturers you may be using and don’t be afraid to ask for them to show you existing installations they’ve completed that are using the products you’re interested in. KNX is certainly the logical choice to me in terms of flexibility and meeting demand, especially if you need to integrate other systems such as heating, blinds, AV etc, but always keep an open mind and one eye on what each of these systems can deliver.
