If you're the person responsible for office lighting—whether it's a 20-person startup or a 400-employee corporate floor—you've probably realized there's no single "right" answer from Legrand. The company makes everything from simple occupancy sensors to full IoT gateway setups, and the best choice depends on your building, your electrical infrastructure, and honestly, how much risk you're willing to take with new technology.
I've been managing office purchasing for about six years now, and I've learned this the hard way. In 2024 alone, I helped consolidate lighting orders across three locations—roughly $50,000 annually across 8 vendors—and what worked for one building was completely wrong for another.
Start With Your Existing Infrastructure, Not the Catalog
Legrand's product line spans a huge range: the adorne and radiant switches for aesthetics, 0-10V dimmers for commercial fixtures, occupancy sensors for conference rooms, under-cabinet LED systems for break rooms or labs, and the newer Zigbee-enabled devices like the IoT Connect gateway. The problem? Most people start by browsing the catalog and get overwhelmed. I did. I spent two weeks comparing the adorne vs. radiant series before realizing the real question was whether our building had neutral wires in the switch boxes.
So let me break this down the way I wish someone had for me—by scenario.
Scenario A: Retrofit in a Multi-Tenant Office Building
You're upgrading lighting in an existing space, probably with standard 120V wiring from the 1990s or 2000s. Your electrician hasn't pulled new wire, and you're not about to rip open walls for a lighting control project.
Best fit: Legrand radiant or adorne dimmers, plus standalone occupancy sensors.
The radiant collection is the workhorse here. The dimmers are dependable, and you don't need a smart hub if your goal is just motion-based shutoff. What surprised me—and this is the thing nobody tells you—is that the occupancy sensors in this line are more finicky than you'd expect. They use PIR + ultrasonic dual technology, and in a room with a lot of HVAC airflow, the ultrasonic side can false-trigger. It took us a month to figure out why the lights in a small server room kept turning on at 2 AM. Turns out the paramedic's airflow was moving papers on a desk.
For retrofit, I'd strongly recommend the ceiling-mounted sensors over the wall-switch ones. They have a better field of view, especially if your office uses cubicles that block line-of-sight to the switch. The wall-box vacancy sensors are fine for small closed offices, but for open plans, ceiling sensors are worth the extra cost. It's about $60–80 more per room, and it eliminated our false-trigger issues entirely.
One more thing: if you're considering the smart radiant dimmers that connect to a hub, make sure your electrician checks for a neutral wire. Most offices have it, but if your building was built before the mid-1980s, you might not. And no, the two-wire version isn't as dimmer-compatible with LEDs. We learned this after buying 24 radiant smart dimmers and having to return 6 of them. That was a fun afternoon with the distributor.
Scenario B: Under-Cabinet Lighting for Break Rooms, Labs, or Pantries
This is where Legrand genuinely shines, and it's also where keyword research led me to realize how many people search for "legrand under cabinet lighting system" and then get confused by the options.
The under-cabinet product line is built around low-voltage LED tape and pucks, powered by a hardwired or plug-in transformer. You can connect multiple fixtures on one driver, which keeps the system clean—no daisy-chained wall warts dripping out from under the cabinets. That alone is worth it for an office break room where you don't want a mess of plugs behind the coffee machine.
But your choice depends on whether you need a plug-in or hardwired system:
- Plug-in transformer: Easier to install, can be a DIY job. This is what most small offices or kitchenette areas should use. The transformer output is 24V DC, and you can connect roughly 20 feet of tape light per driver, depending on the wattage. Ours runs about 15 feet and it's bright—around 800 lumens at 3500K, which is clean and not too sterile.
- Hardwired transformer: Better for offices with dedicated circuits or for code compliance if you're doing new construction. It hides everything in the wall or above the cabinet, and it's the cleaner option if you're already having an electrician on site. The downside? If you ever need to service it, you're calling an electrician again.
I was skeptical about the hardwired route for our main pantry until our electrician pointed out that the plug-in version would occupy the only outlet on that counter. That would've been a conflict with the microwave and the coffee maker. So we went hardwired. It cost about $400 in labor on top of the $350 in parts, but it fixed the outlet shortage and cleaned up the junction box mess under the sink. Worth every penny if you're working with limited outlets.
Also worth knowing: Legrand's under-cabinet system uses a 24V DC low-voltage standard. That's the same voltage used by many commercial lighting tape systems, but not the same as the 12V DC used in some other brands. If you're ever extending or replacing a fixture, don't assume it's compatible. I made that mistake with a used tenant-improvement purchase. It was a $220 lesson that "LED tape looks the same" doesn't mean it's the same.
Scenario C: Taking It to the Next Level with the IoT Connect Gateway and Zigbee
This is the area that's grown the most in the last 18 months, and it's also the one that triggers the most questions. "Zigbee stack," "Zigbee standards"—these are real concerns, not just jargon. When you start integrating 20–30 devices, interoperability stops being theoretical.
Legrand's Zigbee-enabled devices—the smart switches, dimmers, and the IoT Connect gateway—are designed to work with third-party hubs like Amazon Echo Plus, SmartThings, or the Legrand Home + Control system. The gateway itself is essentially a Zigbee-to-Wi-Fi bridge that gives you app control, scheduling, and energy monitoring if you're using compatible fixtures.
Here's the thing that took me a while to understand: Zigbee is a standard, but it's not always well-implemented in every Hub. The Zigbee 3.0 specification is the current standard (and it's backwards-compatible with older Zigbee Home Automation (ZHA) profiles), but how well a hub handles the mesh network really matters. In our office, we have a mix of Legrand switches and sensors plus a couple of other Zigbee devices (a smart plug and a contact sensor). Using a hub that supports Zigbee 3.0 natively has kept the network stable. With an older hub that only spoke ZHA 1.2, we had drops every few days.
Now, I know what some of you might be thinking: should I just use Wi-Fi devices instead, like the other major smart lighting brands? Well, Zigbee has a fundamental advantage in a commercial setting: it's a mesh network. Every Zigbee mains-powered device acts as a repeater, so the range extends through the whole floor without buying extra access points. Wi-Fi-based switches rely on your office network's coverage, and if your Wi-Fi is congested—which it always is in an office—you'll get lag and dropped connections.
The Zigbee stack in Legrand's gateway handles the routing table automatically, but you need at least a handful of mains-powered devices (like smart switches) to build that mesh. If you're only installing one or two Zigbee devices in a far corner of the building, they'll struggle. The rule of thumb I've read is roughly one mains-powered Zigbee repeater per 20–30 feet, but it depends on construction materials. Drywall and wood are fine. Concrete and metal studs are not. Steel-framed buildings will require more devices or closer spacing to get the same reliability.
A good way to judge your situation: if your office has a lot of open space and minimal interior walls, you're fine. If you have a dense layout with utility rooms, storage rooms, and mechanical areas, build your mesh with at least a few smart switches or plugin repeaters in the middle of the floor plan. If you don't have that, the far corners will have weak connections and occasional disconnects.
Also, one technical detail that matters for commercial installations: Zigbee operates on the 2.4 GHz band, the same as Wi-Fi. Yes, it uses a different transmission technique (DSSS with channel hopping), but if your office Wi-Fi is heavily congested, you can still see interference. The standard way around it is to choose a Zigbee channel that doesn't overlap your Wi-Fi channels. The channel affects it quite a bit—for instance, Zigbee channel 15 (the default on many devices) can overlap with Wi-Fi channels 1–6. Some gateways automatically select a less congested channel, but you may need to manually configure yours if you have persistent interference problems. I'd never recommend telling a client this is a "set it and forget it" protocol, because Wi-Fi configurations change.
Scenario D: The "I Just Need It to Work" Option
Not every office needs a smart system. And honestly, some offices shouldn't have one. If you're in a small single-tenant building with a reliable maintenance person, a set of basic Legrand occupancy sensors and 0-10V dimmers will do the job for a fraction of the cost.
For most retrofits, I'd put a standard Legrand occupancy sensor in every conference room and restroom. Any room with less than 20 minutes of occupancy at a time is a prime candidate. That's where the ROI is quickest: no one leaves the lights on in a conference room on purpose, but it happens all the time. A sensor costs roughly $40-80 in parts and saves about 2-3 hours of lighting operation per day in a room that might otherwise be left on. It adds up.
The catch with the basic approach is that you lose the energy reporting and scheduling. You'll be able to see the lights go on and off with motion, but you won't have data for ESG reporting or to show the CFO at the end of the year. If you don't need that data, skip the gateway. If you do—and a lot of corporations now require energy usage tracking for sustainability reporting—then the IoT Connect route is worth the extra expense.
How to Figure Out Which Scenario You're In
Here's the practical guide:
- Start with your electrical layout. Check if you have neutrals in the switch boxes. If you don't, your smart dimmer options are limited. That automatically pushes you toward the simpler sensor-and-dimmer route or a more expensive line like Legrand's Radiance with a separate adapter. (Naturally, this is where you start measuring things and realizing why your electrician charges what they do.)
- Determine your occupancy pattern. Are conference rooms used on a schedule or on-demand? On-demand suggests occupancy sensors are a high-value addition. If they're used on a strict schedule, you could probably get by with a time clock instead. But in 2025, with hybrid work schedules, almost no one has a predictable booking pattern, so sensors win.
- Check your wall and ceiling construction. If you have metal studs or concrete block walls, factor in a plan for mesh reliability. You may also want the ceiling-mounted sensors anyway because wall-mounted sensors have limited line of sight.
- Look at your existing light fixtures. If you have 0-10V dimming drivers in the LED troffers, you can use Legrand's 0-10V dimmers and get continuous dimming at a reasonable cost. That's the smarter route if you don't need smart control. The rule of thumb is: if your building was built or renovated after 2015, you almost certainly have 0-10V drivers.
- Size your budget, but include labor. A smart dimmer may cost $50–100. The dimmer on its own is useless without a compatible LED driver or bulb. And the electrical labor for the whole system is often the largest single line item. I've seen $5,000 in lighting products come with a $3,500 electrical bill because every switch location needed a deeper box or the wiring had to be rerouted. It's not fun, but it's the reality of the trade.
- If you're planning a large rollout, test one room first. We made the mistake of rolling out 40 smart dimmers across two floors and then dealing with quirks on the hub side. If we had tested one room for a month, we'd have caught the neutral wire issue and the Zigbee route optimization before ordering in bulk. That's the single best piece of advice I can give.
On the "Can Plants Grow Under UV Light" Question
I have to say, this keyword comes up a lot in lighting searches, and it's worth a quick clarification because it affects how you choose any lighting product—including under-cabinet lighting if you're planning to use it for indoor plants.
Yes, plants can grow under UV light—but not just UV. Photosynthesis uses mostly red and blue wavelengths (roughly 660nm and 450nm, respectively). UV-B (280–315 nm) and UV-A (315–400 nm) are not primary drivers of photosynthesis; they're more involved in stress responses and secondary metabolite production. So a generic "UV light" isn't what you want for growing plants. You want a full-spectrum fixture or a commercial horticultural light that includes UV at a low intensity.
The reason this matters for a Legrand discussion is that I occasionally see office admins buying LED under-cabinet tape lights for a plant shelf and then wondering why the plants don't thrive. The standard Legrand tape lights (3000K or 4000K options) are fine for supplemental light in a bright room, but they won't replace a purpose-built grow light. If your intention is to help a few pothos plants in a dark corner, a 3500K under-cabinet fixture at 600+ lumens will do. But if you're attempting to grow anything more than low-light houseplants, you need a horticultural fixture with an actual PPFD rating and probably more intensity than an under-counter light will provide.
I learned this after moving a small pepper plant into our server room with an under-cabinet light. It grew, but it was leggy and never produced fruit. The spectrum was wrong—too much green and yellow, not enough deep red. Anyway, that's a tangent. But it's a good example of why you need to think about the specific output, not just the fixture's color temperature.
Final Recommendations
If you're an office administrator and you mainly want lighting that works without fuss, here's your short answer:
- For a plain retrofit: Use Legrand radiant dimmers with 0-10V LED drivers if your fixtures support it. Or use the Isoleé DVCL-153P style dimmer if you have standard mains-voltage LED bulbs. Either way, add occupancy sensors in the rooms that are frequently left on.
- For under-cabinet lighting: Go with the hardwired 24V DC kit if you have an electrician involved. It's a cleaner install and won't fight over outlet space.
- For smart building integration: Invest in the Legrand IoT Connect gateway and Zigbee devices if you have a larger network or need energy data. But go all-in—a two-device Zigbee mesh is not reliable.
I know that reading this far might make you feel like there's a lot to think about—and there is. But the good news is that once you answer the four questions (neutral wires? occupancy pattern? wall construction? dimming type?), the decision becomes much easier. The key is not to let anyone convince you that one hardware package fits everyone. It doesn't. What works for a 2-person architecture studio is not what works for a 150-person legal office with a break room kitchenette plan.
Hope this helps you avoid some of the missteps I made. If you have a specific layout in mind, feel free to reach out—I'm always happy to talk through the switch-by-switch decisions over a coffee. Or a cold beer, depending on how the installation went.