This checklist is for you if: you're a small business owner, a DIY installer, or a procurement person who doesn't place huge orders. You're not a big box retailer. You're someone who needs a Mean Well 12v power supply for a job—maybe for LED strips, a camera system, or a custom lighting project—and you don't have time to become a power supply expert. You just want to get the right part, at a fair price, without getting burned.

I’ve been managing procurement for a 12-person AV installation company for about 4 years now. Our annual spend on power supplies is maybe $18,000—not huge, but enough that I feel every mistake. Over that time, I've ordered from 12+ different suppliers, bought maybe 300 Mean Well units, and made some truly dumb choices. This checklist is the process I wish I'd had from day one.

This process has 6 steps. If you follow them, you'll save money, avoid compatibility nightmares, and end up with a product that works. Let's go.

Step 1: Identify Your Exact Voltage and Wattage (Don't Guess)

This sounds obvious, but this is where most of the costly mistakes happen. You need two numbers: the voltage (which you already know is 12V) and the total wattage of everything you're powering.

How to calculate total wattage:

  • Find the wattage (or amperage) for every device you're connecting. LED strip lights usually tell you the watts per meter or foot.
  • Total up the wattage. Then, add a 20% safety buffer. A driver running at 100% load 24/7 will fail faster than one running at 80%.

Example from a job we did last month: A client wanted a 5-meter LED strip that pulled 14.4W per meter. Total = 72W. 20% buffer = 86.4W. We needed a Mean Well driver rated for at least 86.4W. The LPV-100-12 works here (100W, 12V). The LPV-60-12 (60W) would have failed.

Common Mistake Here

People forget about the power loss in long wire runs. If you’re running the DC power 30+ feet (like hiding the LED strip power supply in a cabinet), the voltage drop can cause flickering. For long runs, consider a larger gauge wire or a Mean Well driver with a voltage adjustment trim pot (like the LPV series).

Step 2: Choose the Right Form Factor (Where Are You Hiding This Thing?)

This is the 'how to hide LED strip lights power supply' step. The physical size and shape of the supply matter a lot, especially in small jobs.

  • Enclosed (e.g., LPV-60-12): Metal case, good for dry locations, relatively compact. Easily mounted on a wall or inside a cabinet.
  • Waterproof (e.g., HLG-60H-12): IP67 rated. Use for outdoor signs, landscape lighting, or anywhere exposed to moisture.
  • Din Rail (e.g., HDR-60-12): For industrial control panels. Not for hiding in a living room.

A common trick I've seen work well: For hidden LED strip installations (like under cabinets), use the Mean Well LPV-60-12 or LPV-100-12. They are skinny rectangles that fit behind the cabinet kick-plate or inside a 4x4 junction box. For a zoom spotlight application (like a track light conversion), you might use a small, dimmable driver like the Mean Well LCM-60 series, which is designed to fit inside smaller fixtures.

Step 3: Don't Assume 'Compatibility' (Check the Dimming Type!)

If you need a mean well driver that dims, you can't just grab any 12V supply. This is a huge pain point. There are multiple dimming protocols:

  • 0-10V Dimming: Uses two extra wires. Most common for commercial lighting. Example: Mean Well HVGC-100-700A.
  • PWM Dimming: Requires a PWM signal. Often used for RGBW LED strips.
  • Resistance/TRIAC Dimming: Works with standard wall dimmers. The Mean Well LCM-60TC series is a solid choice for this.

If I remember correctly, about 70% of our returns in the first year were because someone bought a 0-10V driver for a TRIAC system. You can't just make that work with an adapter (ask me how I know). Always check the spec sheet or the 'Dimming Data' tab on the vendor's site.

Step 4: Find the Supplier (The 'Small Order' Trap)

This is where the 'small customer friendly' viewpoint really applies. As a small buyer, you have a target on your back. Large distributors like Mouser, Digi-Key, or Newark will actually ship one unit to you, but their pricing won't be great. Specific Mean Well distributors (like TRC Electronics, Powergate) are often better for technical support, but they might have minimums or slow shipping for low-value orders.

My approach (as of Q1 2024): I search for the specific Mean Well model number. I compare 3 vendors. I look for evidence they are an authorized distributor (check Mean Well's website). The cheapest price from a random Amazon seller is a gamble. I've seen counterfeit Mean Wells that don't output stable voltage. (That 'free setup' offer on Amazon actually cost us $450 more in hidden fees when the unit failed and we had to redo the wiring).

Key question to ask the vendor: 'Do you have stock of the Mean Well [model number] right now, or is it on backorder?' A 4-week lead time can kill a small job.

Step 5: Check the Reviews (But Be Skeptical)

A lot of the search volume for 'mean well lrs-350-24 review' or 'mean well driver review' shows that people are trying to validate the quality. For Mean Well products, which are already industrial-grade, reviews are often about the vendor, not the product.

Look for reviews that mention:

  • Sound: Does the unit make a high-pitched whine under load? Some Mean Well drivers do at low load. This matters if you're hiding it in a quiet room.
  • Heat: The unit should be warm, not too hot to touch. A review complaining of 'extreme heat' might indicate a counterfeit.
  • Functionality: 'Dims well with my Lutron system' is a useful datapoint. 'It works' is not.

Side note (circa 2022): We bought a batch of Mean Well LPC series drivers from a new vendor. The price was great. After installation, they all started buzzing. We discovered they weren't genuine Mean Well units. The copper windings were smaller. We ate the cost and returned them. That was a $1,200 lesson.

Step 6: Plan the Physical Installation (The 'Hiding the Supply' Step)

You've got the right Mean Well 12V power supply. Now, where does it go? This is the 'how to hide led strip lights power supply' problem. Here's the checklist:

  1. Ventilation: Mean Well drivers generate heat. Don't bury it in foam or insulation. Give it at least 6 inches of clearance around the ends.
  2. Accessibility: You'll need to reset it or check the LED indicator. Don't bury it in a sealed drywall box. A removable panel or a cabinet with a latch is ideal.
  3. Wire Management: Use strain reliefs where the AC and DC wires exit the driver. If the wires get yanked, the terminal block can break.
  4. Mounting: Use the provided mounting brackets or screw holes. Don't just let it sit in a pile of wires. A loose driver can short out against something.

Final Notes: Common Mistakes I Still See

  • Overpaying for Features: Do you need a 'dimmable' driver for a simple sign that's always on? No. You're paying 30-40% more for a feature you won't use. The Mean Well ELG-75-12 is a great non-dimmable option.
  • Not Buying a Spare: For a critical application (like a server room light), buy two. The cost of one $30 power supply is nothing compared to a service call.
  • Ignoring the Warranty: Mean Well has a 5-year warranty on many models (like the HLG series). The cheap non-branded supply has a 1-year warranty. The TCO (Total Cost of Ownership) math is clear.

Prices as of December 2024 for reference: A Mean Well LPV-60-12 typically runs $22-28. A HLG-60H-12 is around $38-45. Verify current pricing at your preferred vendor.