# Red Light Therapy and Photobiomodulation

Red light therapy (photobiomodulation, or PBM) is real but heavily over-marketed. The single thing to get right: two different things share the word "Rotlicht". The classic German Rotlichtlampe is a heat lamp that warms tissue, fine for a stiff neck or a cold, but it is not photobiomodulation. Modern PBM uses non-thermal red (around 630 to 660 nm) plus near-infrared (around 810 to 850 nm) LED light aimed at your mitochondria. The evidence is solid for skin, decent for hair, mixed for pain, and early for aging eyes. For "living longer" there is zero human data.

Rotlichtlampe, LED panel, LLLT. What works, what is marketing, and the German naming trap.

## On this page

- Is the German Rotlichtlampe the same as red light therapy?
- How does photobiomodulation actually work in your cells?
- What does the research actually prove?
- Is red light therapy safe, and what are the real risks?
- How do you actually use it, and what should you buy?

## FAQ

- Is a normal Rotlichtlampe the same as red light therapy?
- Does red light therapy actually make you live longer?
- Does red light therapy work for wrinkles and skin?
- Is more red light or a longer session better?
- What wavelength and power should a red light panel have?
- Is red light therapy safe for your eyes?

## Sources

- Wunsch A, Matuschka K. (2014). A Controlled Trial to Determine the Efficacy of Red and Near-Infrared Light Treatment in Patient Satisfaction, Reduction of Fine Lines, Wrinkles, Skin Roughness, and Intradermal Collagen Density Increase. Photomedicine and Laser Surgery. https://doi.org/10.1089/pho.2013.3616
- Hamblin MR. (2017). Mechanisms and applications of the anti-inflammatory effects of photobiomodulation. AIMS Biophysics. https://doi.org/10.3934/biophy.2017.3.337
- Hamblin MR. (2018). Mechanisms and Mitochondrial Redox Signaling in Photobiomodulation. Photochemistry and Photobiology. https://doi.org/10.1111/php.12864
- Shinhmar H, Grewal M, Sivaprasad S, Hogg C, Chong V, Neveu M, Jeffery G. (2020). Optically Improved Mitochondrial Function Redeems Aged Human Visual Decline. The Journals of Gerontology: Series A (Biological Sciences and Medical Sciences). https://doi.org/10.1093/gerona/glaa155
- Shinhmar H, Hogg C, Neveu M, Jeffery G. (2021). Weeklong improved colour contrasts sensitivity after single 670 nm exposures associated with enhanced mitochondrial function. Scientific Reports. https://doi.org/10.1038/s41598-021-02311-1
- Chow RT, Johnson MI, Lopes-Martins RA, Bjordal JM. (2009). Efficacy of low-level laser therapy in the management of neck pain: a systematic review and meta-analysis of randomised placebo or active-treatment controlled trials. The Lancet. https://doi.org/10.1016/S0140-6736(09)61522-1
- Gupta AK, Mays RR, Dotzert MS, Versteeg SG, Shear NH, Piguet V. (2018). Efficacy of non-surgical treatments for androgenetic alopecia: a systematic review and network meta-analysis. Journal of the European Academy of Dermatology and Venereology. https://doi.org/10.1111/jdv.15081
- Pillai JK, Mysore V. (2021). Role of Low-Level Light Therapy (LLLT) in Androgenetic Alopecia. Journal of Cutaneous and Aesthetic Surgery. https://doi.org/10.4103/JCAS.JCAS_218_20
- Sathe NC, Roach JP. (2023). Erythema Ab Igne (Toasted Skin Syndrome). StatPearls (NCBI Bookshelf)

_Full guide: https://longevity-cities.com/en/guide/rotlichttherapie-photobiomodulation_

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_Canonical: https://longevity-cities.com/en/guide/rotlichttherapie-photobiomodulation · Part of Longevity Cities · Updated 2026-06-22_