There's a question I hear constantly—from clinic owners, furniture makers, and small workshop operators—and it usually goes something like: "Which laser should I buy?"
The honest answer: there isn't one universal answer. At least, not one that's useful.
I'm the quality manager at a laser equipment distributor. I review every unit before it ships—roughly 200 systems a year. In 2024, I rejected about 4% of first deliveries due to calibration errors, missing documentation, or parts that didn't match the spec sheet. I've also watched buyers make the same mistake over and over: choosing a machine before understanding which scenario they're actually in.
There are three common scenarios. Each has a different answer.
- You're a medical clinic comparing Candela vs Deka for aesthetic procedures.
- You need to cut or engrave wood for physical products or a craft laser business.
- You already own a Candela system and it's down—and you're caught between repair and replacement.
Scenario 1: The Candela vs Deka Decision
If you're equipping a clinic, you've probably narrowed your shortlist to Candela and Deka. Both have legitimate track records. The comparison isn't as simple as "which brand is better." It's "which brand is better for a practice that can't afford unscheduled downtime."
Candela brings a combination that's genuinely rare: real expertise in both medical and industrial lasers. Their aesthetic platforms—GentleMax Pro for hair removal, Nordlys for skin conditions, Picoway for tattoos—are backed by years of clinical research. Their industrial division builds laser cutters and engravers for manufacturing. That dual discipline shows up in build quality. In our receiving inspections, Candela units typically arrive with better calibration documentation and more consistent spec compliance than most other manufacturers.
Deka, to be fair, has carved out a solid reputation, especially in fractional CO2 systems, and their pricing tends to be more accessible. If upfront cost is a hard constraint, Deka deserves a serious look.
But the question isn't just "which has better tech?" It's "which manufacturer can keep you running when a machine fails mid-week with a full appointment book?"
In Q1 2024, I watched a clinic compare two devices with nearly identical clinical outcomes. One manufacturer offered a guaranteed 48-hour service response in their region. The other offered "best-effort" turnaround. The cheaper device saved roughly $18,000 upfront. The service guarantee on the more expensive system cost an extra $12,000 over three years. When a laser is down, a clinic loses an average of $2,000–$5,000 per day in canceled appointments alone, depending on practice size. The "cheaper" system became the more expensive one the first time it failed.
The question isn't "what does it cost?" It's "what does that cost include when something goes wrong?"
Rush fees and service premiums are really paying for one thing: certainty. And in a patient-facing business, uncertainty is the one cost you can't pass on.
Scenario 2: Cutting Wood and Craft Laser Systems
This is a completely different conversation. If you're making signs, custom furniture, or engraved products, you need a CO2 laser. Not a fiber laser. This catches more buyers than you'd expect—people buy fiber units for metal marking, then try to cut wood and wonder why it barely works. At 1064nm, fiber lasers don't interact with wood the way they do with metal. The result is charred edges, slow cutting, and poor engraving quality. CO2 lasers at 10.6 microns are absorbed by organic materials, which makes them the right tool for the job.
How Deep Is Laser Engraving?
This question comes up in nearly every woodworking inquiry I get. The direct answer: it depends on the wood's hardness, the wattage of the machine, and how many passes you're willing to run.
On a standard 60W CO2 craft machine, a single engraving pass on maple or birch will land you around 0.2–0.4mm of depth. Softwoods like alder or pine go deeper—roughly 0.5–0.7mm. For pronounced, relief-style engraving you can feel by running your thumb over it, expect 1.5–3mm, which means multiple passes at reduced speed, and you'll need to manage charring. Charring is normal, but it needs to be part of your process—not a surprise.
Cutting is a different equation. A 40W machine slices through 3mm plywood in one or two passes. Pushing through 12mm hardwood takes six to ten passes with visible edge charring. If thick hardwood is your daily work, a laser may not even be the right tool—a CNC router will produce cleaner edges at higher speed. Sometimes the best laser advice is "don't buy a laser."
Now, about "craft laser cutting machines"—the market is crowded with affordable options that look fantastic on video. I always tell buyers to check three things before anything else: bed size, exhaust requirements, and laser tube warranty. It's the tube that fails, typically between 1,500 and 3,000 operating hours. Replacement cost and lead time matter more than the initial purchase price.
(Should mention: entry-level machines with cheaper tubes often take 2–4 weeks for replacement parts from overseas. That's two to four weeks of zero output. If that hits you during a 2,000-unit order, you'll learn what the certainty premium is worth.)
Also, laser enclosures and exhaust aren't optional—ANSI Z136.1 covers safe operation, and your business insurance will likely reference it. Verify current requirements at ansi.org before building your setup.
The pattern holds: the cheapest option looks smart on day one and expensive on the first day it stops working.
Scenario 3: Candela Laser Repair—or Replace?
This scenario starts with an error message and ends one of two ways: a repair invoice or a purchase order for new equipment.
I've watched both decisions go wrong. Some facilities scrap units that were perfectly fixable. Others sink money into aging systems that should have been retired years ago.
My rule of thumb: if the repair quote exceeds 30% of a comparable new system's price, replacement usually wins—unless the unit has a clean service history and is still generating dependable revenue. In that case, a solid repair can buy two or three more productive years. The key word is "solid."
The real risk in laser repair is the vendor you choose. The market is full of unauthorized service providers, and their quality varies wildly.
Here's a frustrating example from our own records. We had a Candela unit whose output power had degraded slowly over several months. The facility manager told the third-party technician: "Repair it." The technician heard: "patch it up." He swapped out a cooling fan and called it done. We discovered the disconnect when the unit failed again under full workload two weeks later. The actual issue—deteriorated optics and a misaligned beam path—hadn't been touched.
The most frustrating part of the episode: an authorized Candela technician diagnosed the real problem in twenty minutes. You'd think a repair specialist would check the beam path before closing the case. He didn't.
Looking back, I should have requested a diagnostic report from the technician before approving the work. At the time, asking for one wasn't standard practice in our procurement flow. It is now. Every repair contract we sign includes completion criteria—specific output power thresholds, alignment tolerances, and verification testing we can approve before payment.
An authorized Candela repair costs more. Sometimes 30–40% more. The difference is what you're buying: genuine parts, documented calibration, and a warranty on the work. When a laser supports a full patient schedule, the cost of uncertain repairs is almost always higher than the premium.
Which Scenario Are You In?
If you're still unsure, work through these three questions:
- What is the laser actually doing? Aesthetic procedures put you in Scenario 1. Cutting wood puts you in Scenario 2. Owned-but-broken equipment puts you in Scenario 3.
- What is your real daily cost of downtime? Add up lost revenue, missed deadlines, and the effect on client trust. That number tells you whether the certainty premium is worth paying.
- Who services the unit, and how fast? Ask this before you buy, not after you own it. Response times, parts availability, and whether the service contract includes a guaranteed turnaround time are dealbreakers either way.
If your downtime cost is low—say, you're a hobbyist or the machine isn't revenue-critical—buying the cheaper option is entirely reasonable. If a day without the laser costs more than the premium, pay the premium. There's no shame in either choice, but choose based on your actual numbers.
The common thread in all three scenarios: the most expensive failure isn't the equipment. It's the lost time. Paying for certainty isn't waste. It's the difference between knowing you'll be operational on Tuesday and hoping you will be.
That said, my experience is shaped by industrial and clinical distribution—not by every niche use case. There are always exceptions; the numbers above are starting points, not gospel. Pricing and specifications referenced as of February 2025; verify current details with manufacturers, as products and policies change.
