Red light therapy (630–700 nm) penetrates the skin to improve texture, tone, collagen production, and overall appearance. Near-infrared (NIR) light therapy (700–1,100 nm) reaches deeper tissues, supporting wound healing, muscle recovery, nerve repair, and joint pain relief. Studies show NIR light can penetrate up to 3–4 cm, offering neuro-regenerative benefits and potentially reducing headaches, anxiety, sleep issues, and cognitive impairments.

The diagram below illustrates how deep red and NIR wavelengths (650–950 nm) penetrate deeper than other light wavelengths.

When delivered together, red and near-infrared light wavelengths render positive effects on the skin, metabolic processes, nervous system, endocrine system, and general immune system.