My phone rings at odd hours. “The driver died—can you get me a replacement by tomorrow morning?” “We’re 14 drivers short for a store opening, what’s actually in stock?” I’ve been the person who takes those calls for 12 years, and I’ve learned one thing: a single question saves more time than any spec sheet. What exactly are you powering?

That’s because there’s no universal “best” Mean Well power supply. When someone searches for a Mean Well power supply 24v, they usually need the LRS series. When someone searches for the Mean Well LPC-60-700 dimming resistor range, they’re building a dimmable constant current setup. Different jobs, different drivers—and picking wrong means a delayed project and a redo. In March 2024, a contractor called at 6:42 PM needing 14 drivers for a storefront sign that had to be live by 7:00 AM. We got them there. But only because the first question was “what’s the fixture spec?”—not “what’s your budget?”

Here are the three most common lighting scenarios I get called about, and the Mean Well solution I’d route each one to:

  • Flood lights & outdoor 24V systems → constant voltage, LRS series (e.g., LRS-150-24)
  • Dimmable chandeliers & bathroom lighting → constant current, LPC series (e.g., LPC-60-700)
  • Replacing a bathroom light fixture → check the old driver label first, then match

Scenario 1: Flood Lights & Outdoor Lighting — Constant Voltage, 24V

When a contractor calls me about outdoor flood lights, there’s a 90% chance they need constant voltage—and a 70% chance the spec is 24V.

Why 24V? It lets you run longer cable runs without significant voltage drop compared to 12V. That matters when you’re spacing flood lights around a building perimeter and don’t want the last fixture running dim.

My default for this scenario is the Mean Well LRS series. The LRS-150-24 delivers 24V at 6.5A (150W), which covers most small-to-medium flood light runs. It’s not a pretty component—it’s a metal case with screw terminals. Reliable, well-stocked, and priced sensibly. Exactly what you want in a utility box.

Three things I always tell people before they order:

  • Add 20% headroom to your wattage calculation. If your fixtures total 120W, don’t buy a 120W supply. A 150W unit gives you breathing room for inrush current and prevents premature aging.
  • Check the IP rating. The LRS series is not IP67. If the driver sits outdoors without a protective enclosure, you need a potted, waterproof driver instead. Water always finds the gap.
  • Match the voltage to the fixture. A fixture designed for 24V will not run correctly on 12V, and vice versa. Verify the fixture spec sheet before you buy.

On cost: the LRS-150-24 runs roughly $30–38 from authorized Mean Well distributors (pricing as of January 2025; verify current quotes with your supplier). A discount-brand clone might be $18. And in my experience, those $18 units start failing in 18–24 months. Then the labor to replace it—$100–150 for a service call—makes that cheap supply the most expensive one. That’s total cost of ownership, and it’s why I don’t buy no-name supplies for my own clients.

Scenario 2: Dimmable Chandeliers & Bathroom Lighting — Constant Current with 3-in-1 Dimming

The “bathroom chandelier” search is a different beast. People aren’t looking for a standard power supply—they need a dimmable LED driver that matches their fixture’s constant current requirements.

If your fixture uses constant current LED modules (or COB arrays), you cannot run it on a 24V constant voltage supply. You’ll get flicker—or worse, burned-out LEDs. The correct tool is a constant current driver like the Mean Well LPC-60-700.

The LPC-60-700 outputs 700mA constant current (up to ~91V, 60W) and comes with Mean Well’s 3-in-1 dimming function. That means three ways to control brightness:

  1. Resistance dimming: connect a 100kΩ linear taper potentiometer between DIM+ and DIM-. Output current ranges from about 10% to 100%. The “dimming resistor range” refers to the 0–100kΩ range of that potentiometer. Stick with 100kΩ; a lower-value pot caps your maximum brightness.
  2. PWM signal: a 10V PWM signal, usually 100Hz–3kHz.
  3. 1–10V DC: standard interface from a lighting control system or smart dimmer.

One detail that catches a lot of installers: the LPC-60-700 is designed for constant current LED modules, not screw-in bulbs. If you’re dimming standard bulbs, you don’t want this driver—you want constant voltage dimming or a dimmable bulb plus a compatible switch.

The surprise I keep running into: most installers don’t fumble the wiring. They fumble the driver type. I worked with a contractor in 2023 who wired a 24V constant voltage supply to a constant current fixture, then spent an afternoon chasing a stubborn flicker. The fixture’s spec sheet clearly said “700mA constant current.” He’d skipped that line.

Scenario 3: Replacing a Bathroom Light Fixture — Read the Old Label First

“How to remove bathroom light fixture” is usually where someone starts a DIY swap. Removal is the easy part. The tricky part is figuring out what to put back in—especially if the old fixture stopped working.

Quick removal sequence:

  1. Turn off the breaker and verify power is dead with a voltage tester. Non-negotiable.
  2. Remove the mounting screws or nuts holding the fixture base to the junction box.
  3. Support the fixture with one hand while disconnecting the wire nuts.
  4. If it’s a chandelier, get a second person to hold the weight. Don’t let it drop.

Now, before you buy a replacement, look at the old driver’s label. That label gives you 90% of the information you need:

  • If it says “700mA constant current”, you need a constant current driver like the LPC-60-700.
  • If it says “24V DC output”, you need a constant voltage supply like the LRS series.
  • If the old driver burned out, don’t just match wattage—match the output type. And make sure your new fixture’s total wattage doesn’t exceed 80% of the driver’s rating.

I’m not an electrician, so I can’t speak to local bathroom junction box code requirements—those vary, so verify them with your local authority. What I can tell you from a power supply perspective: photograph the old driver label before you touch anything. A 10-second photo prevents a 30-minute support call later.

How to Tell Which Scenario You’re In

Here’s the routing logic I use when a client calls in a panic:

Step 1: Indoor or outdoor? Outdoor flood lights or landscape lighting → constant voltage, 24V—LRS series. Indoor → go to step 2.

Step 2: Is dimming required? Yes → you need a dimmable driver. For constant current fixtures, the LPC-60-700 with 3-in-1 dimming covers most cases. For screw-in bulbs, you don’t need a driver at all—just a compatible dimmer switch. No → a standard constant current or constant voltage driver, depending on the fixture spec.

Step 3: Is this a replacement? Yes → read the old driver’s label and match the output type. If you’re unsure whether the fixture needs constant current or constant voltage, check the fixture’s spec sheet. “Watts per foot” means constant voltage. “Drive current: 700mA” means constant current. That single distinction prevents 80% of the wrong purchases I see.

Still not sure? Call an electrician. A $150 consultation is cheap compared to the cost of a fried fixture and a redo.

I have mixed feelings about naming two “default” models, because the right answer always depends on your specific load. But after 12 years and 200+ rush orders, my defaults are the LRS-150-24 for 24V constant voltage work, and the LPC-60-700 for dimmable constant current fixtures. Both are UL listed (UL 8750 for the LPC series), both are stocked at most authorized Mean Well distributors, and neither will make you look bad in front of a client who needed it yesterday.