Halo is not a CO2 laser. It’s a hybrid fractional laser made by Sciton that combines two different wavelengths: a non-ablative 1470 nm wavelength and an ablative 2940 nm wavelength. A CO2 laser, by contrast, operates at 10,600 nm. The two devices work differently, recover differently, and treat the skin through distinct mechanisms.
What Halo Actually Is
Halo was the first hybrid fractional laser on the market, and its defining feature is that it delivers two laser wavelengths simultaneously to the same microscopic treatment zone. The ablative 2940 nm wavelength targets the epidermis, the outermost layer of skin, addressing surface-level concerns like texture and pore size. The non-ablative 1470 nm wavelength penetrates deeper into the dermis, targeting sun damage and pigmentation issues beneath the surface.
This dual approach is what makes Halo a “hybrid.” Traditional lasers are either ablative (they vaporize skin tissue) or non-ablative (they heat tissue without destroying it). Halo does both at once. The ablative component creates tiny channels in the epidermis to improve texture and tone, while the non-ablative component stimulates collagen production in the deeper skin layers. The combination produces both resurfacing and skin-tightening effects in a single session.
How CO2 Lasers Differ
CO2 lasers use carbon dioxide gas as their medium and emit energy at 10,600 nm, deep in the mid-infrared spectrum. That wavelength is highly absorbed by water in skin cells, which makes CO2 lasers powerful ablative tools. They vaporize tissue more aggressively than Halo’s 2940 nm ablative wavelength, which is why CO2 treatments have long been considered the gold standard for deep wrinkles, severe sun damage, and significant scarring.
The tradeoff is intensity. CO2 laser resurfacing typically requires up to two weeks of recovery, compared to roughly one week for fractional laser treatments. CO2 lasers also carry a higher risk of pigmentary changes (darkening or lightening of the skin after treatment), particularly in people with medium to darker skin tones.
Why People Confuse the Two
The confusion is understandable. Both Halo and CO2 lasers fall under the umbrella of fractional skin resurfacing, and both are used to treat similar concerns: fine lines, sun damage, uneven texture, and discoloration. Clinics often list them side by side on their menus. The word “ablative” shows up in descriptions of both devices, which can make them sound interchangeable.
But the wavelengths are fundamentally different. Halo’s ablative component uses an erbium-type wavelength (2940 nm), which is less aggressive than CO2’s 10,600 nm. And Halo pairs that with a non-ablative wavelength that no CO2 laser includes. The result is a treatment that sits between a gentle non-ablative session and a full CO2 resurfacing in terms of both results and recovery.
Recovery and Downtime
One of the biggest practical differences between Halo and CO2 is how long your skin takes to heal. After a CO2 laser session, you can expect up to two weeks of visible recovery, including significant redness, peeling, and swelling. Many people need to take time off work.
Halo’s recovery is shorter. Most people experience a few days of redness, warmth, and a sandpaper-like texture as the tiny treated zones heal. The skin typically peels within three to five days, and many patients feel comfortable returning to normal activities within a week. This faster healing is one of the main reasons people choose Halo over CO2 when their skin concerns are moderate rather than severe.
Who Each Laser Works Best For
Halo has been studied in patients with Fitzpatrick skin types I through IV (ranging from very fair to olive or light brown skin). In clinical assessments, patients across that range experienced no adverse effects, and researchers found that Halo treatments resulted in faster healing and a lower risk of pigmentary changes compared to traditional ablative CO2 lasers. People with darker skin tones can still be treated, though providers typically reduce the treatment density to minimize the risk of post-procedure darkening.
CO2 lasers are generally reserved for patients with lighter skin tones due to the higher risk of pigmentation problems. They’re also better suited for deeper concerns: pronounced wrinkles, significant acne scarring, or extensive sun damage that a lighter treatment won’t adequately address. If your concerns are primarily surface-level discoloration, mild texture issues, or early signs of sun damage, Halo’s hybrid approach delivers noticeable improvement with less disruption to your skin and schedule.