Three years ago, I told a supplier I needed 'standard drivers' for a dimmable light fixture project. What they heard was 'cheapest drivers in stock.' The drivers arrived, we installed them, and the fixtures only turned on and off—no dimming. Rework cost us about $1,400. That is the moment I stopped buying on unit price and started looking at total cost.

I'm a procurement manager at a 40-person lighting systems company. I've managed a component budget of about $180,000 a year for six years, negotiated with more than 30 vendors, and tracked every order in our cost system. When people ask me about Mean Well power supplies, these are the questions they actually ask.

  • What is the difference between a Mean Well power supply and a Mean Well LED driver?
  • When should I use a Mean Well DIN rail power supply?
  • Why does everyone spec a Mean Well 24VDC power supply?
  • Can a Mean Well 24VDC supply handle chandelier pendants?
  • What about hunting spotlights? Do they need a special driver?
  • Where do I attach the ground wire on a light fixture powered by a Mean Well driver?
  • Is Mean Well's 3-in-1 dimming worth the extra cost?
  • Should I just order the cheapest Mean Well power supply that matches the wattage?

What is the difference between a Mean Well power supply and a Mean Well LED driver?

Basically, a power supply provides a constant voltage, such as 24VDC. An LED driver provides a constant current, or at least a current that is regulated to match the LED load. Mean Well makes both. The LRS-150-24 is a 150W, 24V enclosed power supply. The LPC-60-700 is an LED driver with a 700mA output and a voltage range that depends on the LED array.

Use a 24VDC power supply when the fixture has its own current-limiting circuits, like most LED strips and some modules. Use an LED driver when you are connecting directly to LED chips or COB arrays (chip-on-board arrays). Mixing the two up is an expensive way to learn the difference. If the fixture spec sheet is not clear, ask the fixture engineer before ordering.

When should I use a Mean Well DIN rail power supply?

A Mean Well DIN rail power supply, like the HDR-60-24, is designed to snap onto a standard DIN rail inside an electrical cabinet. I choose it when the power supply has to sit next to relays, timers, sensors, or a PLC. The wiring stays organized and the whole assembly can be built and tested before it goes on site.

For simpler projects, an enclosed power supply like the LRS series is usually cheaper and easier to mount on a flat panel. DIN rail is not a performance upgrade in most cases; it is a packaging choice. If you are setting up a control cabinet with both low-voltage controls and LED lighting circuits, the extra cost of DIN rail is worth it. For a one-off fixture with a separate power supply, I would not pay the premium.

Why does everyone spec a Mean Well 24VDC power supply?

Because 24VDC is kind of a sweet spot. It is low voltage, so it is not as dangerous as line voltage, but it carries power over longer distances than 12V, where voltage drop gets annoying quickly. A Mean Well 24VDC power supply covers a huge range of LED strips, modules, relays, and small equipment.

In our shop, the two models I order the most are the HDR-60-24 for DIN rail projects and the LRS-150-24 for general constant-voltage use. The exact wattage depends on the load. But when a customer asks for a simple LED solution, 24VDC is the first thing I look for.

Can a Mean Well 24VDC supply handle chandelier pendants?

Yes, as long as the pendant is designed for constant voltage. Many chandelier pendants use LED strips or modules that run on 24VDC. Add up the wattage of every pendant on the circuit, multiply by 1.2, and pick a supply that covers that number. Six pendants at 12W each equals 72W, so a 100W supply gives you reasonable headroom.

The part that is easy to miss is physical. The power supply needs to be somewhere accessible, ventilated, and not visible inside the canopy of a nice chandelier. Looking back, I should have marked the remote mount location on every order. At the time, we did not, and one of our contractors tried to cram an LRS-150-24 into a space that was never meant for it. It worked, but only after we sent a smaller external supply.

What about hunting spotlights? Do they need a special Mean Well driver?

Usually, yes. A hunting spotlight is a high-output fixture, and if it uses an LED array, the LED needs a constant-current driver. You can't just feed it 24VDC unless the fixture was built with constant-voltage input.

Mean Well makes several families that work here: LPC for basic constant-current needs, HLG for higher wattage and isolation, XLG for outdoor and higher-voltage options. The important number is the LED array's forward voltage and the current the array is rated for. If you are retrofitting a spotlight, choose a driver rated for the LED current, not the brightest possible setting. Running an LED at 90% of its maximum current usually extends life. Don't hold me to an exact percentage for every chip, because it depends on the datasheet.

Where do I attach the ground wire on a light fixture powered by a Mean Well driver?

I'm not a licensed electrician, and I'm not 100% sure on every local code, so local codes always get the final word. But the general rule is: the ground wire from the AC supply connects to the green grounding screw on the fixture body or mounting bracket. If the Mean Well driver has a ground terminal on the AC input side, connect that to the same earth ground. The DC output side is often Class 2/SELV and does not need a separate ground, unless the datasheet says otherwise.

For chandelier pendants, the ground point is usually the mounting bracket inside the canopy. For a metal hunting spotlight, it is the ground lug on the housing. If an old fixture has no ground wire and no ground terminal, stop and call an electrician. Never use the neutral wire as a ground.

Is Mean Well's 3-in-1 dimming worth the extra cost?

If you know the fixture will never be dimmed, no. If there is a chance the end user will want different brightness levels, yes. Mean Well's 3-in-1 dimming gives you three control options in one driver: resistor, PWM, and voltage signal. The resistor range is useful when you want a fixed brightness setting without installing a separate controller.

For a manufacturer, that flexibility cuts down SKUs. Instead of stocking one non-dimmable driver and one dimmable version, you can stock the dimmable driver and configure it with a resistor or control signal during installation. The extra cost is small compared with sending a technician back to replace a driver after the fact. If you are building chandelier pendants or spotlights with a dimming option, pay for the dimmable driver.

Should I just order the cheapest Mean Well power supply that matches the wattage?

No, and I know that is annoying to hear from someone who manages budgets for a living. The cheapest unit price is usually not the cheapest total cost. I have compared 8 vendors in one order and seen a $12 spread on an LRS-150-24. That spread disappears the first time you pay $80 in shipping, wait an extra week, or receive a unit with a scratched label and no reliable warranty support.

Total cost includes unit price, shipping, lead time, support, and the risk of failure. If a bad driver takes out a chandelier pendant already installed in a finished space, the labor alone erases any savings. Mean Well's value is consistency. Buy from authorized distributors, keep the datasheet, and verify current specs before ordering. This pricing and lead-time picture was accurate as of Q1 2025. The market changes fast.