Last updated on August 10, 2026

In everyday life, infrared is almost automatically equated with heat. Physically, however, it is primarily light. And depending on the wavelength, this light can unfold very different effects. This article deliberately does not focus on pure deep heat, but on infrared light that works without strong heating and is associated with skin health, collagen formation, and cellular processes in light therapy.

What is infrared light?

Infrared light is located in the light spectrum directly below visible red light. You cannot see it, but your skin perceives it. Depending on the wavelength, three main ranges are distinguished:

• Near-infrared (IR-A): light-like, low heat generation
• Mid-infrared (IR-B): more thermally influenced
• Far-infrared (IR-C): primarily heat effect

For light-based applications related to skin and collagen, the near-infrared range is particularly important. This is precisely where infrared light clearly differs from classic deep heat.

Infrared light or infrared deep heat?

In everyday life, terms like infrared mat, heating mat, or deep heat are often used interchangeably. Technically, however, they are different concepts that should be clearly separated.

You can read more about the beneficial side of warmth in the article how warmth enriches us.

Effects of infrared light therapy

In research, infrared light therapy is considered a photobiological application. So, it's not primarily about heat, but about the effect of light on biological tissue. Especially in the near-infrared range, research investigates how light impulses can support processes in the skin, including regeneration-related and collagen-dependent processes.

In practice, infrared light is therefore often used for facial and skin applications or as a complement to light therapy. How strongly you perceive the effect is individual and depends on wavelength, application duration, distance, skin type, and regularity. The topic of biophotons, which illuminates the role of light at the cellular level, is also related.

Using it at home: Application and everyday life

Modern devices make infrared light therapy easily accessible at home today. Everyday usability is particularly important here. A suitable device should

• work in the near-infrared range,
• have clearly defined light parameters,
• and fit comfortably and effortlessly into your routine.

The focus is not on high temperatures, but on controlled light emission. Whether it's a light therapy device, an infrared cabin, or a flat application like a mat: the decisive factor is less the design than the question of whether you can use the application regularly and relaxed.

Conclusion: Consciously using infrared light

Infrared light is more than just heat. When correctly understood and consciously used, it can be a gentle impulse for skin, tissue, and cellular processes. The crucial factor is not the intensity, but understanding which form of infrared you are using and why. As part of a coherent whole of conscious routines, rest, and movement, it becomes a calm, regular support for natural processes. The article why your body isn't actually the problem explains why many people feel exhausted despite all their efforts.