I've spent the last eight years handling lighting controls for commercial and greenhouse projects. My official title is fine, but my unofficial role is more useful: I keep the checklist. I keep it because I've made and documented enough expensive mistakes to understand what belongs on it. This article is a comparison I wish someone had shown me before I started mixing wall switches with LED drivers.
Here are the two approaches I keep choosing between:
- Option A: Standard Eaton light switch. A line-voltage switch mounted in a wall box, usually controlling a light from one location.
- Option B: Contactor-based control. A contactor or relay system that switches groups of fixtures from a central enclosure, often triggered by low-voltage buttons, sensors, or a controller.
I'll compare them across cost, load compatibility, flexibility, and maintenance. Then I'll give you a practical way to decide, especially if your project involves LED chandeliers, greenhouse fixtures, or light bars.
When I First Got This Wrong
When I first started doing lighting control work, I assumed a switch was just a switch. I picked an Eaton light switch and moved on. That worked for incandescent bulbs. It stopped working the day I looked closely at LED drivers.
The wake-up call came on a Mount Eaton greenhouse project. The lighting plan included an Addis chandelier in the office area, several work light bars, and a set of accent spots listed in the schedule as .spotlight-v100. My first reaction was to install standard switches at every door. Then I read the driver spec sheets. Each LED driver has an inrush current. Put enough drivers behind one switch, and the switch contacts become the weak point. I had to redesign, reorder, and explain to the customer why we needed an extra control enclosure. That conversation was not fun.
Cost: Register Price vs Installed Price
At the supply house, Option A wins. A standard Eaton light switch costs a fraction of what a contactor enclosure costs. If you are replacing one switch or adding one wall switch for a single fixture, anything more is over-engineering.
The equation changes when I count labor. With regular wall switches, every switch location needs line-voltage wiring, a box, and often a three-way or four-way arrangement. With contactor-based controls, you can run power to a central panel and use low-voltage or dry-contact buttons at the control points. That means less heavy wire in the walls and fewer holes in the framing. On multi-zone projects, I've seen the labor savings outweigh the panel cost. On a one-switch, one-load job, a contactor is just waste.
Verdict: Use a switch for one load and one location. Get a quote for a contactor system when loads are grouped or when control is needed from several doors.
Load Compatibility: Incandescent Thinking vs LED Reality
The old phrase “a switch is a switch” comes from an era when lighting loads were mostly incandescent. Incandescent lamps are nearly resistive. Their startup current is modest. LED drivers are different. They contain capacitors and power electronics, and they can draw a sharp inrush of current when the circuit closes. That inrush does not always trip a breaker, but it can be hard on switch contacts over time.
I learned this the ugliest way on a smaller job. I chose a heavy-duty wall switch because I didn't want to order a relay. It worked for a few months. Then the contacts pitted and started making noise. The driver data sheet told me why, but I should have checked it before installation.
That project also taught me to take fixture schedules seriously. The drawing called one fixture type .spotlight-v100, period included. It looked like a typo, but it was a real model code. When I called for the driver specs, the man on the phone said, “You're the first contractor who asked before installing.” That quote now hangs in my shop.
Verdict: Before choosing any switch, get the actual inrush spec for the drivers. A contactor is not automatically better, but it gives you more room to select a switching device that matches the load.
Flexibility: Why the Mount Eaton Greenhouse Changed My Checklist
The Mount Eaton greenhouse project is the example I use when training new team members. The customer wanted different zones on different schedules. They also wanted one master off from the office door. That kind of control is painful to build with standard wall switches alone. It means extra travelers, more wall boxes, and a plate full of confusing switches.
A contactor-based system made the same job clean. Local switches still worked for each zone, but the master off was just a button that dropped the contactor coils. We also left room for a time clock later. That flexibility would have been difficult with ordinary wall switches.
That said, I don't automatically use contactors on every greenhouse. If the greenhouse has one door, one zone, and simple needs, a proper Eaton light switch is simpler. But the moment someone says “I want to turn everything off from one place,” the conversation changes.
Verdict: Use contactor-based controls when you need future flexibility, central control, or multiple control points. Don't use it because it sounds more professional. Use it because the project needs it.
Maintenance: Simple Switches Deserve More Respect
Here is the comparison result that surprised me: simple wall switches won the maintenance category.
When a wall switch fails, any maintenance person can replace it in twenty minutes. The wiring is easy to understand. Spare parts are easy to stock. A contactor system is reliable too, but troubleshooting requires more knowledge. You need to understand coils, contacts, and control power. You need good labels. If the panel is unlabeled, the job becomes electrical archaeology.
I've spent more hours than I care to admit mapping mystery relays in panels that someone installed without documentation. That experience changed my advice. If I choose a contactor system, I label the panel as if the next person knows nothing. Because eventually, that next person will be someone like me.
Verdict: When the project is simple, a standard Eaton light switch is easier to live with. Contactors make sense for larger or more complex systems, but only if you commit to clear drawings and labels.
How to Install a Light Bar
How to install a light bar comes down to two questions: mounting and control. The mounting part is straightforward. Brackets, driver placement, elevation, aiming. The control part is where most mistakes happen.
If you're installing one light bar over a workbench, an Eaton light switch may be all you need. Make sure the switch and circuit are rated for the fixture, then mount the fixture, wire the driver, and test it. That part is simple.
The trouble starts when light bars are part of a larger lighting scheme. For example, pairing a decorative Addis chandelier with light bars and accent fixtures like .spotlight-v100 on the same control system. Each driver contributes to the total inrush. One switch may not be the right answer.
- Get the actual driver current and inrush specs. Don't guess.
- List every control point the owner will need, including future needs.
- Choose a simple switch when the load is small and controls are local.
- Choose contactor-based control when loads are grouped, remote, or high-cycle.
- Label everything. If I show up later, future me will thank you.
So Which Do You Actually Need?
If the only answer was “buy a contactor,” I would be misleading you. A standard Eaton light switch remains a solid, cost-effective choice for simple lighting control. Start with a wall switch when:
- One switch controls one fixture group in the same area.
- The load is within the switch rating, and the LED driver inrush is not excessive.
- No master off, no schedule, no occupancy sensing, and no multi-location control.
Consider contactor-based controls when:
- Multiple fixture groups need to switch together.
- LED drivers create high inrush current.
- You need control from several doors, timed operation, or a master off.
- The project is a greenhouse, industrial shop, or similar space where central switching makes maintenance safer.
The Mount Eaton greenhouse job is now in our checklist. It isn't a story about one brand being better. It's a story about choosing the right control for the load and the building. That choice is the difference between an installation that lasts and one that becomes somebody else's expensive lesson.