Infrared light has three different levels: near (NIR), mid (MIR), and far (FIR). Each level has their own distinct characteristics, frequency ranges, and benefits.
What is Infrared Light?
Infrared Radiation In The Electromagnetic Spectrum - BYJU'S
Infrared Waves
Infrared Light And Red Light For Ankle, Adjustable
Safe & Non-Invasive: the apparatus adopts the principle of modern infrared light treatment, red light delivers non-thermal (non heat) photons of light
Red Light Therapy Device for Back, 3 Power Mode/ 4 Timer, 12x 650nm+1x 808nm, Pain Relief Low Level Infrared Light
Infrared Therapy: Health Benefits and Risks
Near, Mid and Far-Infrared
Infrared Physiotherapy Waistband Timed Three Levels Energy
What happens to light beyond the infrared wavelength? - Quora
The Science of Near-Infrared Lighting: Fact or Fiction - Illuminating Engineering Society
What is infrared light? – Herschel Space Observatory
Near-Infrared (NIR) Light Sources for 3D Facial Recognition
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Near-infrared spectroscopy - Wikipedia