200W or 300W? How Much Laser Power a Jewelry Workshop Actually Needs

Almost every buyer asks it in the first email: how much laser power does a jewelry workshop actually need — 200W or 300W? It feels like the decision that matters most. In practice it is the one most likely to cost you money, because wattage is the least informative number on the datasheet.

Here is the short answer. For a jewelry repair bench, 200W is almost always enough laser power, and a well-designed 200W will out-weld a badly designed 300W. What actually decides your results is pulse energy, spot range and duty cycle — three numbers most quotes bury. The long answer is below.

“200W” is a class, not a specification

Two jewelry laser welders both labelled 200W can differ by more than 2× in what a single pulse will do. We went through the physics in Joules vs Watts, so the short version: average power — the “200W” on the box — tells you how long the machine can keep working. Pulse energy, in joules, tells you how hard one pulse hits. The second number is the one your weld quality depends on.

On 200W-class machines, pulse energy ranges from roughly 60 to 130 joules depending on the power supply design. That spread is wider than the gap between a weak 200W and an average 300W. So when you compare a 300W with 100 joules per pulse against a 200W with 130, you are not choosing more power. You are choosing a bigger number on a sticker.

This is why the first question to any supplier is not “how many watts” but “what is the single pulse energy, and can I see it weld silver on video?” The first half separates people who know their machine from people who read the brochure. The second half shows you the weld before you spend anything. A laser welder power rating with no joules figure next to it tells you almost nothing.

What a 200W jewelry laser welder actually welds

A well-built 200W YAG — 130 joules per pulse, 0.1–20 ms pulse width, 1–20 Hz, a 0.1–3 mm spot range — covers the great majority of what an independent jewelry workshop does in a day:

• Gold repairs and resizing. 21K and 22K, standard shanks, prongs, settings, chain links. Comfortable, repeatable, one clean hit on most joints.
• Silver. Reflective and heat-conductive, so it needs more peak power than gold — but a 130-joule machine handles it without drama. If silver is most of your work, the technique matters more than the wattage.
• Platinum. Casting repair and sprue removal are the real test. This is where pulse energy shows up: a 60-joule machine needs multiple passes, runs hotter and leaves a weaker joint. A 130-joule machine melts it in one hit.
• Porosity filling and small buildup. Big spot, moderate energy. Power is not the constraint here; technique is.
• Lightweight and hollow work. Thin-wall hollow gold and delicate chain are usually a lower energy job, not a higher one. More power is actively unhelpful — see Welding lightweight and hollow gold.

That is a long list, and it is the reason most single-bench shops that buy 300W never use the extra capacity.

When 300W earns its money

There are real cases. They are narrower than the sales copy suggests, but they exist:

• Volume production with a fixture. If the machine runs continuously against a jig — batch ring sizing, chain repair lines, repeat production work — higher average power means higher duty cycle. You can weld longer before the machine needs to rest. That is throughput, and throughput is money.
• Heavy sections and thick castings. Large silver castings, substantial platinum work, deep repair builds. When the metal is thick enough that a 130-joule pulse needs several passes, the extra energy pays for itself in cycle time.
• Fill work at scale. Deep pore filling and buildup on production parts go faster with more energy per pulse and a larger spot.
• You are also buying headroom. Some buyers take 300W purely to avoid being the shop that has to turn a job down. That is a legitimate reason, as long as you price it honestly against how often those jobs actually arrive.

What the extra laser power does not buy you: better weld quality on thin material, better precision on fine prongs, a longer machine life, or a better-looking joint. On delicate work, more power is a liability you have to learn to control.

One number to put next to the price. Our 200W delivers 130 joules per pulse; our 300W delivers 150. That is 50% more average power and only about 15% more energy in each pulse — and that gap explains everything else on this page. The 300W buys you more working time and a faster pace, not a dramatically harder hit. If your problem is a thick casting that takes four passes, 150 joules will not turn it into one. If your problem is a bench that cannot keep up with volume, the extra duty cycle is exactly what you are paying for.

The price gap, for the record, is roughly $1,500–$3,000 between our 200W build and our 300W build — mainly the laser rod, the lamp and the power supply, which is the expensive part of either machine. That is what you pay for the extra laser power.

The jobs that should not buy either

We would rather tell you this now than have you find out after delivery. If any of the following describes your workshop, a 200W or 300W pulsed YAG is the wrong tool, and no laser power rating will fix it:

• You mostly join, not repair. Continuous seam welding on new production is a different process. You want a different machine.
• Your work is nearly all micro-soldering or brazing. There are cheaper, faster tools for that, and a laser welder is overkill.
• You need cosmetic, invisible repairs on high-polish surfaces all day. Laser welds are not invisible. They are strong, precise and small — but they leave a heat-affected zone, and if your business is invisible restoration, you need to test a machine on your own worst job before you believe any brochure.
• Your volume does not justify the cost yet. At a handful of jobs a week, a $4,000 machine that sits idle is a worse investment than sending the work out until your volume arrives.

What we build, and when we tell people not to buy up

We build both. Our standard benchtop is the PG-LN200W — 200W, 130 joules per pulse, and that is the laser power most benches actually need. We also build the same machine at 300W, configured to order: 150 joules per pulse, the same 2-year warranty, the same 72-hour parts dispatch, 15 days to build.

Which means we have no reason to push you upward. So read the next sentence as being against our own interest: most single-bench jewelry repair shops should buy 200W, and should not spend the extra on 300W just to have a bigger number on the datasheet.

A custom build also means 15 days rather than a machine off the shelf. If you need one next week, that is a real constraint, and we would rather say it here than have you find out after you order.

The reverse is just as true, and we say it often enough that it costs us sales. If you run batch production against a fixture, if platinum castings are a big share of your work, or if you are regularly turning away thick-section jobs, take the 300W. You are not choosing between two suppliers — you are choosing between two builds of the same machine, and we will quote both so you can see the gap in writing.

How to decide which laser power you need in one afternoon

You do not need a spec sheet comparison. You need three numbers from your own bench:

• Your average daily job count, by metal. Count a week, not a good day.
• Your thickest regular job — the one that takes the most passes today. If it is thin hollow work, stop reading and buy 200W.
• Your pain threshold on cycle time. If a joint that takes three passes is fine, 200W is fine. If three passes costs you money because the bench is a bottleneck, that is what the extra laser power buys.

Bring those three numbers to any supplier, including us, and the answer takes about ten minutes. Bring nothing and you will be sold whatever is in stock.

Send us your typical job and we’ll tell you honestly if 200W is enough

Describe the jewelry work you do most — metal, thickness, and whether it is repair or production. We will tell you straight whether 200W is the right laser power or whether you should step up to the 300W build, and we will quote both so the difference is on paper. If the answer is 200W, that is what we will recommend.

CN Laser · Guangzhou Centro South Tech

WhatsApp: +86 185 2016 7321 · Get a quote · PG-LN200W spec

Worth reading next: Joules vs Watts · Welding lightweight and hollow gold

Related reading

• Joules vs Watts: What Really Matters in a Laser Welder
• What a Jewelry Laser Welder Really Costs in 2026 ($3k, $10k, $30k)
• Welding Lightweight and Hollow Gold Without Blowing Through