Red Light Therapy vs Infrared Light: What's the Difference?
If you've been researching at-home skincare devices and keep seeing red light therapy vs infrared light mentioned, it's worth understanding what actually separates them. The terms are often used interchangeably — but they refer to different wavelengths that work differently on the skin.
This guide gives a clear, straightforward comparison of red light therapy vs infrared light — what each one is, how they differ, and which suits different skincare goals.
Red Light Therapy vs Infrared Light — What's the Difference?
Both red light therapy and infrared light are used in skincare routines and light-based wellness devices. The key difference is wavelength — and wavelength determines how deeply the light penetrates the skin and what it's primarily used for.
Red light operates in the visible spectrum and works at the surface layers of the skin. Infrared light operates beyond the visible spectrum and penetrates more deeply into tissue. Both are used in at-home devices, but they suit different goals and different types of users.
For a reference overview of how light-based therapies interact with the skin, DermNet provides useful background reading.
What Is Red Light Therapy?
Red light therapy uses wavelengths typically in the 630 to 700 nanometre range — within the visible red spectrum. At these wavelengths, the light is absorbed primarily at the surface and upper layers of the skin.
Red light therapy is commonly used in facial skincare routines and is the basis for most at-home LED face masks and panels. It's used as part of consistent daily or near-daily routines focused on overall skin appearance — texture, tone, and general skin comfort over time.
Sessions are typically passive — a device is placed over or near the face for a set period — making red light therapy one of the easier at-home tools to build into a regular routine.
What Is Infrared Light Therapy?
Infrared light operates at wavelengths above the visible spectrum — typically 700 nanometres and above, with near-infrared sitting in the 700 to 1200 nanometre range. Because these wavelengths are longer, they penetrate more deeply into tissue than visible red light.
Infrared light is used in both skincare and broader wellness applications. In skincare contexts it's commonly associated with supporting deeper tissue comfort and circulation rather than surface-level skin appearance. Near-infrared is the most commonly used range in consumer devices.
Some at-home devices combine red and near-infrared wavelengths in a single panel or mask, allowing both surface and deeper penetration in one session.
Key Differences Between Red Light and Infrared Light
Depth of penetration. Red light works primarily at the skin's surface and upper layers. Infrared light — particularly near-infrared — penetrates more deeply into tissue. If your goal is surface skin appearance, red light is the more directly relevant wavelength. If deeper tissue support is the goal, infrared is more appropriate.
Visibility. Red light is visible — you can see the glow during a session. Infrared light is invisible to the naked eye. Devices that use infrared only don't produce visible light during use, which can make it harder to confirm the device is working without indicator lights.
Use cases. Red light therapy is most commonly used in facial skincare routines focused on skin appearance over time. Infrared is more commonly used in broader wellness applications — muscle recovery, joint comfort, and circulation support — alongside skincare use.
Routine integration. Both can be used passively in a fixed daily slot. Red light devices — particularly LED face masks — are specifically designed for facial skincare integration. Infrared panels tend to be larger and are more commonly used for broader body application rather than targeted facial routines.
Which One Is Better for Skin?
For surface skin appearance goals — texture, tone, and general skin comfort — red light therapy is the more directly targeted option. The wavelengths are absorbed at the skin surface level where most cosmetic skincare goals sit, and the devices designed for facial use are built around delivering red light consistently and evenly across the face.
Infrared light supports skin as well, but its primary advantage over red light is depth — which matters more for deeper tissue goals than for surface skin appearance. For someone specifically focused on facial skincare, a red light device delivers the more relevant wavelength for that goal.
Combined devices that include both red and near-infrared wavelengths offer the benefits of both in one session and are increasingly common in quality at-home LED panels and masks.
For sensitive skin types, understanding which option works best is worth reading alongside a dedicated guide to LED light therapy for rosacea.
Which One Should You Choose?
Choose red light therapy if your primary goal is facial skin appearance — texture, tone, and consistency of skin condition over time. It's the most widely used wavelength in at-home facial skincare devices, the most studied for cosmetic skin applications, and the easiest to integrate into a daily routine through a dedicated face mask or panel.
Choose infrared if your goals extend beyond facial skincare to deeper tissue support — muscle recovery, joint comfort, or broader body wellness. Near-infrared is the appropriate wavelength for those goals and suits a larger panel device used on broader body areas rather than a facial mask.
Choose a combined device if you want the benefits of both in one session. Many quality at-home LED devices now include both red and near-infrared wavelengths, making the choice less binary than it used to be.
For guidance on what to look for in a red light facial device, our guide to the best LED face mask in Australia covers the key specifications and what actually matters when choosing one.
For a broader look at how red light therapy is used in skincare routines, see our guide to red light therapy for skin.