Red Light Therapy: The Complete Guide (2026)
Red light therapy (also called photobiomodulation or low-level light therapy) uses specific wavelengths of red and near-infrared light to support your cells, skin, and recovery. This guide pulls together everything you need to know, with links to deeper articles on each topic.
What is red light therapy?
Red light therapy delivers light in the roughly 630-660nm (red) and 810-850nm (near-infrared) range. Your mitochondria absorb this light and use it to produce energy (ATP) more efficiently, which is the foundation for its benefits. For a full primer, see our beginner's guide.
What does it help with?
- Skin: collagen, fine lines, and tone — see red light therapy for skin.
- Pain & joints: pain relief and arthritis.
- Recovery: muscle recovery.
- Hair: hair loss.
- Sleep & energy: sleep support.
Wavelengths: 660nm vs 850nm
660nm works best on skin and surface tissue, while 850nm penetrates deeper to reach muscle and joints. The best devices combine both — read 660nm vs 850nm.
How to choose a device
Match the device to your goal: a panel for full-body use and pain (the AWA FX300 at $199.99 or full-body FX500 at $299.99), a face mask for skin (the FDA-cleared LX300 at $279.99), or a targeted wrap for a specific joint. Our buying guide walks through the 8 specs that matter most, especially irradiance and FDA status.
Is it FSA/HSA eligible?
Yes — most AWA devices are FSA/HSA eligible, which can save you 30-40% with pre-tax dollars. See how to use your benefits.
How long until results?
Most people notice changes in 2-8 weeks with consistent use. See realistic before-and-after timelines.
Red light therapy is generally very safe. This guide is educational and not medical advice; check with your doctor about your specific situation.