I handle purchasing for a 140-person company. That doesn't sound like a lighting job, but it is. Whenever we move offices, add a conference room, or upgrade a floor, someone has to order the switches, dimmers, sensors, and fixtures. I've been doing that since 2020, and I've learned to stop comparing list prices and start comparing systems. I report to both operations and finance, so my perspective is pretty simple: it has to work, it has to be justifiable, and it has to keep the people in the building comfortable.
For our 2024 office renovation, I had to choose between a full Legrand Adorne IoT lighting package (yes, the official name is Adorne, though you'll see it misspelled as Legrand Adorn IoT in search results) and a more conventional setup: separate dimmers, occupancy sensors, and standard switches. This isn't a smart vs. dumb argument. Both options work. The real question is which one makes sense for the building, the budget, and the people who actually use the room.
Here is the comparison framework I used. I looked at three things:
- Total cost, not just the invoice amount.
- Installation and retrofit complexity, including the electrician's labor.
- Day-to-day behavior, especially how motion sensing and dimming actually get used.
If you're trying to decide between a connected system and conventional controls, those are the dimensions that matter.
Dimension 1: Sticker Price vs. Total Cost
On paper, the conventional package wins. I got quotes from two electrical distributors in January 2025. The basic dimmers, switches, and standalone occupancy sensors came in about 20-25% lower than the Legrand Adorne IoT package with a Zigbee gateway, connected dimmer, and occupancy sensor. If I had stopped at the invoice, the decision was obvious.
But I didn't. Because I've made that mistake before.
In my first year, I made the classic specification error: I assumed the word standard meant the same thing to every vendor. Cost me a $600 redo when a third-party dimmer couldn't handle the LED drivers we had already ordered. That was a rookie mistake, and it taught me to look past the unit price.
Here is where the comparison gets interesting. The conventional package had components from three different manufacturers. That meant three spec sheets, three support lines, and no single person accountable if something didn't work. The Legrand system came as one coordinated set: switches, dimmer, occupancy sensor, and IoT gateway, all listed on one bill of materials.
Is the premium worth it? In our case, yes. We didn't have to chase compatibility issues. The Legrand LED dimmer was designed for LED loads, and the occupancy sensor was listed as compatible with the same Zigbee network as the rest of the system. The total cost of getting it right, including my time, the electrician's time, and one less service call, was close enough that the connected package stopped looking expensive.
My take is simple: value over price. When I say the conventional package is cheaper on paper, I do not mean it is the better deal. The lowest quote often isn't the lowest total cost if you need to rework it.
Dimension 2: Installation and Retrofit Complexity
The second surprise was installation.
I expected conventional wiring to be easier. It isn't necessarily harder, but it is more tedious. Every switch, dimmer, and sensor has to be wired to the right circuit. For our retrofit, that meant a lot of junction boxes, pigtails, and wire nuts.
The Legrand Adorne IoT system wasn't magic. It still requires correct wiring, and your electrician still needs to know what they're doing. But because the devices communicate over Zigbee, the control wiring is simpler. The gateway talks to the dimmer and sensor wirelessly, so you don't need extra low-voltage cables just to make scenes work.
Another detail: downlight connectors. We replaced a bunch of old recessed lights, and using modular downlight connectors instead of wire nuts saved us a solid half-day on the demo and rewire. Some of the connectors were Legrand, some weren't. The point is to not ignore the small parts. They affect labor cost more than you'd think.
If you're comparing, think about who is doing the work. A conventional setup is fine for an electrician who has done it a hundred times. A Zigbee-based system requires one more step: pairing devices after installation. That isn't hard, but it is a skill. In our project, pairing was actually the easiest part. We used the companion app, and it took about an hour for 12 devices. One device didn't join on the first try. Not ideal, but workable.
Unexpected conclusion: the smarter system was not more complex to install. It was just different. For a retrofit with existing can lights, the modular connectors and wireless control saved time. I didn't expect that.
Dimension 3: What Does a Motion Sensor Do? (And Why It Matters)
Let's answer the obvious question: what does a motion sensor do? In lighting, it detects whether a room is occupied and automatically turns lights on, off, or dims them based on occupancy. A standalone occupancy sensor does that for one area. It's a simple device, and it can save energy.
According to the U.S. Department of Energy (energy.gov), occupancy sensors can reduce lighting energy use by 30-50% in the right spaces, like conference rooms, restrooms, and storage areas. That's a real number, and it's why I always include sensors when I buy for an office.
But the comparison isn't just sensor vs. no sensor. It is standalone sensor vs. sensor connected to a system.
A standalone sensor controls its own load. Motion detected? Lights on. No motion for 15 minutes? Lights off. That's it. It works. But it doesn't know about anything else in the room.
With the Legrand Adorne IoT system, the sensor is part of a Zigbee network. The same motion event can trigger multiple behaviors: dim the lights in one zone, turn off another, or send a notification to the maintenance person. You can set a meeting mode where the lights dim to 50% when the room is empty. That's where the value shows up.
A Note on Zigbee Protocols
You'll hear the term Zigbee protocols when researching smart lighting. Zigbee is an open wireless standard maintained by the Connectivity Standards Alliance (csa-iot.org). It operates on low power and creates a mesh network, so devices can talk to each other through the gateway.
For a buyer, the protocol matters because it affects your options later. Legrand Adorne IoT works on Zigbee, which is designed to work with devices from different manufacturers that also follow the standard. That doesn't mean every Zigbee device works with every other one. Compatibility still depends on profiles and how a device is implemented. But it's a better starting point than a closed system.
This was surprising for me: the open standard mattered more than the brand name. I'm comfortable specifying Legrand because the Zigbee foundation means we're not locked into a proprietary future. If we add a window sensor or a third-party Zigbee switch later, there's a reasonable chance it'll join the same mesh. Not guaranteed, but reasonable.
Which One Should You Choose?
If you're still here, you probably want a straight answer. Here's mine.
Choose a conventional setup if:
- You're outfitting a single room or a simple space with no plans for automation.
- Your existing wiring is straightforward and your electrician is familiar with it.
- Your budget requires the lowest possible invoice, and you're willing to manage multiple vendors.
Choose the Legrand Adorne IoT system if:
- You're retrofitting an office, retail space, or multi-room facility where scenes and automation add real value.
- You want one vendor to own compatibility from the switch to the sensor to the gateway.
- You're already thinking about adding more smart devices in the next few years.
But don't choose it just because it's smart. Choose it because the total cost of a working system, including your time, the electrician's time, and the risk of rework, makes sense for your project. That's the value-over-price framework I use for everything now.
The lowest quoted price often isn't the lowest total cost.
Pricing mentioned here is based on quotes from two distributors for our specific project in January 2025. It's not a universal price. Verify current pricing for your location and specification.