LED Light Therapy Device use of the red, blue, Yellow and infrared regions of the spectrum is intended to emit energy to treat dermatological conditions.
The red light (633±10nm wavelength) is generally indicated to treatment of superficial, benign vascular, and pigmented lesions.
The blue light (417±10 nm wavelength) is generally indicated to treat dermatological conditions 
and specifically indicated to treat moderate inflammatory acne vulgaris.
The Yellow light (599±10nm wavelength) is generally indicated to treat dermatological conditions 
and specifically indicated for treatment of periorbital wrinkles and rhytides. 
The infrared light (835±15nm wavelength) is generally use for the temporary relief of minor muscle and joint pain, arthritis and muscle spasm; relieving stiffness; promoting the relaxation of muscle tissue; and to temporarily increase local blood circulation where applied. 

LED phototherapy devices utilize the non-thermal, photo-regulatory effects of solid-state cold light sources to modulate cellular activity, known as photomodulation.

This form of visible light therapy is a non-invasive physical treatment method. Different wavelengths of light penetrate the skin to varying depths and have distinct mechanisms of action. They can be used individually or in sequential combinations of multiple light sources for various applications in skin beautification and the treatment of numerous dermatological conditions