When I first started ordering power supplies for our office lighting projects, I assumed a power supply was a power supply—just grab one with the right plug and move on. That assumption cost me a set of brand-new LED fixtures and a very awkward conversation with our facilities manager (not my finest month).

I manage purchasing for a 300-person company—roughly $200K annually across vendors for everything from office furniture to lighting. I'm not an electrical engineer. I'm the person who has to make sure the right equipment shows up without creating a fire hazard or a budget line item I have to defend to finance.

If you're buying Mean Well supplies for LED lighting—especially for something like a sculptural chandelier or a rusty chandelier retrofit—this FAQ covers what I wish someone had walked me through before my first order.

  • Mean Well 12V 10A vs. 48V—which one do you need?
  • How does an LED driver circuit actually work?
  • Power supply vs. LED driver—same thing?
  • Retrofitting a rusty chandelier safely
  • Sizing, dimming, and knowing when NOT to use a Mean Well

What's the difference between the Mean Well 12V 10A and the 48V power supply?

The Mean Well 12V 10A supply (think LRS-120-12, about 120 watts) is the workhorse for LED strip lights, office accent lighting, and smaller fixtures. 48V models like the LRS-200-48 or HLG-240H-48 get used for a different class of project.

It comes down to current and distance. Higher voltage means lower current for the same wattage, and lower current means less voltage drop over long cable runs. A 48V supply can push power across a room with thinner wire and less wasted energy. For a chandelier with branches spanning three or four meters, 48V is often the smarter call. For a compact fixture with short internal wiring, 12V is easier to work with and cheaper.

Roughly 80% of what I order lands in the 12V bucket. 48V is for larger architectural pieces and longer runs. Maybe 70/30—I'd have to check the purchasing history to give you a real number.

How does an LED driver circuit actually work?

An LED doesn't behave like an incandescent bulb. A tungsten filament resists current naturally—you feed it voltage and it pulls what it needs. An LED is the opposite: it drops a nearly fixed voltage, and then current climbs until the heat destroys the chip. If you connect an LED directly to a 12V supply, it will draw more current than it can survive. It's not a matter of if it fails—it's a matter of how fast.

An LED driver circuit stops that from happening. It does two things:

  • It limits current to whatever the LED is rated for.
  • It adjusts voltage to stay within the LED's forward voltage range.

There are two main flavors, and this is where I got burned:

  • Constant current drivers (like Mean Well's LPC series) lock the current and let the voltage float. These are for bare LED chips.
  • Constant voltage supplies (like the LRS series) lock the voltage and let the LED module's internal resistors handle current limiting. These are for LED strips and modules.

I once ordered a 12V constant voltage supply for LEDs that required constant current. I checked the voltage before ordering. I didn't check the current type. Four fixtures burned out over two weeks before I figured out what I'd done. The specs were in the datasheet—I just didn't read far enough.

Do I need a driver or a power supply? Aren't they the same thing?

Not exactly. All LED drivers are power supplies, but not all power supplies are LED drivers. The difference is in the regulation and protection circuitry.

A standard power supply converts AC mains to a stable DC voltage. An LED driver goes further—it adds current limiting, overvoltage protection, thermal shutdown, and often dimming support.

Practical rules I use now:

  • Bare LED chips or COB modules: buy a constant current driver.
  • LED strips or LED modules with resistors: a constant voltage supply works fine.
  • LED bulbs with standard screw bases: you don't need either—the bulb has its own driver built in.

To be fair, Mean Well deliberately blurs this line. Many of their supplies are labeled as LED power supplies and handle both constant voltage output and dimming. But you still need to know what your LEDs require before you pick a model.

Can I use a Mean Well supply to retrofit a rusty chandelier?

Rusty chandeliers are one of my favorite things to work on. That aged patina is impossible to replicate, and LED retrofits let you keep the character while making the fixture practical for daily use. But the power setup depends entirely on the fixture's condition and wiring.

Scenario 1: The chandelier has standard screw sockets (E12 or E14). This is the easy path. Use dimmable LED bulbs and skip the external driver entirely. Just check the bulb's voltage requirement and make sure it's marked as dimmable—not all LEDs are.

Scenario 2: The LEDs are wired directly into the frame. This is common in sculptural chandeliers where the designer soldered LEDs to the metal structure. In that case, you need a constant current driver matched to the LEDs' forward voltage and current rating.

For the sculptural chandelier in our lobby, I went with Mean Well's enclosed LRS series. The model I used was a constant voltage type because the LED modules had onboard resistors. A DIN rail supply like the HDR series is another solid option if you're integrating everything into an electrical cabinet. The key is checking the LED seller's spec sheet before ordering.

What actually makes Mean Well worth considering?

I've bought power supplies from several brands over the years. When I consolidated vendors in 2024, Mean Well came out ahead for three reasons:

  1. Documentation is genuinely good. Datasheets list minimum load, dimming range, thermal derating—everything I need to answer questions from our engineering team without making five phone calls.
  2. The 3-in-1 dimming option. Many Mean Well models support dimming via resistor, PWM, or 0-10V signal on the same unit. That means I can order one part number instead of three versions.
  3. Model consistency. Once I find the right series for a fixture type, I can spec it across projects and know exactly what I'm getting.

The surprise for me was the 3-in-1 dimming. I expected to need a separate dimmable driver for the executive suite dining chandelier. The Mean Well unit handled both a wall dimmer and a 0-10V control system without an extra controller. That saved time and reduced our component count.

How do I size a Mean Well power supply correctly?

Sizing is straightforward once you stop guessing. Here's the process I use for every chandelier project:

  1. Add up the wattage of every LED the supply will power.
  2. Add 20% headroom for inrush current and safety margin.
  3. Match the voltage to your LEDs—12V, 24V, or 48V.
  4. Confirm the current type—constant voltage or constant current.
  5. Check the minimum load spec. (Should mention: some supplies regulate poorly below a certain load. Mean Well datasheets list this clearly.)

Example: a sculptural chandelier with six 8W LED modules pulls 48W total. With 20% headroom, I'm looking for at least a 60W supply. An LRS-75-12 would handle that comfortably. If I skipped the headroom, the supply would run hotter and the capacitors would age faster. I learned that one the expensive way on a budget project back in 2023.

When should I NOT use a Mean Well supply?

Honest answer: if you're restoring an antique chandelier with original cloth wiring from the 1920s, don't DIY it with any power supply—Mean Well or otherwise. You need a licensed electrician to rewire the fixture first. No amount of good engineering in a box fixes unsafe house wiring.

Also, if you need the driver to hide completely inside a slender chandelier arm, the enclosed LRS series probably won't fit. Look at Mean Well's ultra-thin or open-frame options, or remote-mount the driver somewhere accessible.

I recommend Mean Well for most indoor lighting projects, but "most" isn't "all." Around 80% of the time, these supplies are the right answer. Knowing when they're not is what keeps your fixtures alive and your budget intact. I verify current model availability and specs on Mean Well's official site as of April 2025—product lines change, so always check the latest datasheets before you order.