So, you're looking at the Glowforge Aura and wondering if the laser wattage is enough. Honestly, that's the question I get most often from the small business owners and workshop managers I work with. And the short answer is: it depends on what you're trying to cut.
I'm an office administrator for a 20-person company that runs a small production studio. I manage all the equipment and supply ordering—roughly $150,000 annually across 15 vendors for consumables, materials, and hardware. I report to both operations and finance. When we were looking into laser cutters last year, I spent a solid month digging into specs, talking to users, and comparing real-world performance. Here's what I found.
Look, there's no universal 'right' wattage for a desktop laser. It's like asking what engine size you need in a truck. If you're hauling lumber across town, you need one thing. If you're picking up groceries, you need another. The Glowforge Aura sits in a specific spot in that spectrum, and whether it's right for you depends on your materials and production volume.
What Is the Glowforge Aura Laser Wattage?
The Glowforge Aura uses a 40-watt CO2 laser tube. That's the standard power level for most entry-to-mid-level desktop laser engravers and cutters. For context, the Glowforge Plus and Pro models also use a 40-watt tube. The difference between those models isn't power—it's speed, pass-through capabilities, and materials handling.
Now, 40 watts sounds low compared to industrial CO2 lasers that run 100-150 watts or fiber lasers that can punch through metal. But for a desktop unit aimed at crafts and small business production, it's actually a sweet spot. 40 watts is enough to cut through 1/4-inch plywood in a single pass, engrave anodized aluminum, and cut most acrylics up to about 1/4 inch thick.
I wish I had tracked our material thicknesses more carefully before we bought our unit. What I can say anecdotally is that probably 80% of what we cut is under 1/4 inch thick. So for our use case, 40 watts is more than enough. If you're regularly cutting 1/2-inch hardwood or thick acrylic, you might need more power or slower passes.
Dremel Laser Cutter vs Glowforge: A Real-World Comparison
When we were evaluating options, someone on our team brought up the Dremel laser cutter. So I looked into the Dremel laser cutter vs Glowforge question pretty thoroughly. The Dremel LC40 is the main competitor in this space. It also uses a 40-watt CO2 tube. So on paper, they're equals.
But here's what the specs don't tell you: software and workflow. The Glowforge operates through a cloud-based interface. You upload a design, it processes on their servers, and the machine runs. The Dremel uses a local software suite that runs on your computer. Which is better? It depends on your setup.
When I compared the Dremel and Glowforge side by side with three of our designers, I finally understood why this matters. The Dremel's software is more traditional—you have full control over settings, but it's clunky and takes getting used to. The Glowforge's software is simpler, more intuitive, but requires internet access. For our designers who work remotely half the time, the cloud dependency was a concern.
I should add that the Dremel LC40 has a slightly larger work area—20 x 12 inches vs the Glowforge Aura's 11.5 x 19.5 inches—but the Aura's print bed is designed for easier material loading. We went with the Glowforge because the user experience was better for our team, not because the power was different.
What Is a Fiber Laser Engraver? And Do You Need One?
This is where people get confused. You see 'laser engraving' and think all lasers are the same. They're not. A fiber laser engraver uses a different type of laser—a solid-state laser that generates a beam through optical fibers doped with rare-earth elements, typically ytterbium. Fiber lasers operate at a wavelength of about 1064 nanometers, compared to CO2 lasers which run at 10,600 nanometers.
Why does that matter for you? Because wavelength determines what materials the laser can work with. CO2 lasers (like the Glowforge Aura) are great for organic materials—wood, leather, acrylic, paper, fabric, and some plastics. Fiber lasers are designed for metals and some engineered plastics. A fiber laser can engrave directly on stainless steel, aluminum, brass, and even some coated metals. A CO2 laser can't do that directly—you need a marking compound or spray to create contrast on metal.
Industry standard guidance (Source: Universal Laser Systems technical documentation) says CO2 lasers are best for non-metals and fiber lasers for metals. There's overlap—you can use a CO2 laser on coated metals with marking compounds—but the efficiency and quality are different.
I only believed this distinction mattered after I saw someone try to engrave a stainless steel tumbler on a 40-watt CO2 machine. It basically just reflected the beam. The result was barely visible and took three passes. On a 20-watt fiber laser, that same project takes minutes and looks clean.
Laser Engraving Leather: Can the Glowforge Aura Handle It?
Yes. Absolutely. Laser cutting leather is one of the Glowforge's best applications. A 40-watt CO2 laser at the right settings cuts through leather like butter—most vegetable-tanned leathers up to about 5-6 ounces (roughly 2mm) cut cleanly in a single pass.
But I'll be honest: I have some cautions here. When we first started laser cutting leather, we ran into issues with burnt edges and inconsistent cuts. The problem wasn't the machine—it was the leather. Not all leather is created equal, and the laser doesn't distinguish between a high-quality vegetable-tanned piece and a bonded leather scrap.
Here's what I learned the hard way:
- Chrome-tanned leather can release toxic fumes when lasered. I didn't know this until a supplier warned us. Always check the tanning method before cutting.
- Thickness matters more than you think. If your leather is thicker than about 2mm, you'll need to do multiple passes or reduce speed significantly.
- Engraving vs cutting. For leather engraving, you want lower power and faster speed. For cutting, you want higher power and slower speed. The Glowforge's software presets handle this well, but you'll still need to adjust based on your specific hide.
I don't have hard data on our leather defect rate across all projects, but based on our experience, I'd say about 10-15% of our early leather projects had visible quality issues. After we standardized our material sourcing, that dropped to under 5%.
Which Scenario Fits You?
So here's how I'd break it down into three groups:
Scenario A: The Hobbyist and Small Crafter
If you're making personalized gifts, small home decor, or occasional items for friends and family, the Glowforge Aura's 40 watts is plenty. You probably don't need more than 1/4-inch material thickness. The Aura's simplicity will save you time. Cost is a factor, and the Aura is the most affordable of the Glowforge models. Prices as of Q1 2025 are around $1,995 for the Aura, compared to $3,995 for the Pro (verify current pricing on glowforge.com).
Scenario B: The Small Business Owner
If you're making products to sell—custom signs, engraved gifts, small batch production—the 40 watts is workable, but you'll need to optimize your workflow. Consider whether you need the faster speed of the Glowforge Pro (which is 2x faster in cutting speed, not power) or if the Aura's standard speed is acceptable. Also consider materials. If you're cutting 1/4-inch acrylic regularly, you'll be fine. If you're cutting 1/2-inch hardwood for signs, you might need a more powerful unit.
Scenario C: The Production Shop
If you're running orders daily and need to cut through thicker materials or need faster throughput, the Glowforge Aura is probably not the right fit. Look at higher-powered CO2 lasers (60-100 watts) or fiber lasers for metal engraving. The Aura is designed for light-to-medium production, not heavy industrial use. A production shop I know runs three Epilog Helix 60-watt lasers for their daily work and uses a Glowforge for prototypes and small custom orders. Different tools for different jobs.
How to Decide
The question isn't 'is 40 watts enough?'—it's 'is 40 watts enough for what I'm doing?' If you're mostly working with wood, leather, acrylic, and paper under 1/4 inch thick, the answer is yes. If you need to cut thick materials, metal engraving, or high-volume production, you need something more powerful.
Take it from someone who manages purchasing for a small production team: know your materials before you know your laser. We spent weeks comparing specs before we realized we needed to define our material range first. Once we did that, the decision became obvious.
