TABLE 1.

Parameters of different wavelengths of LED light and their clinical applications

	BLUE	YELLOW	RED	IR	COMBINED
Wavelength (nm)	400-170	570-590	630-700	800-1200	Variable
Depth of LED light penetration	<1mm	0.5-2mm	2-3mm	5-10mm	Variable
Deepest target	Epidermis	Papillary dermis	Adnexa	Adnexa and reticular dermis	Variable
Studied therapeutic uses	Acne Combination therapy	Photoaging Post laser and IPL recovery Wound healing Radiation dermatitis	Post-surgical recovery Post-laser recovery Skin rejuvenation Photodynamic therapy Photodynamic therapy with injection of sensitizer Sunburn protection Mucositis	Wound healing Ulcers Photorejuvenation Combination therapy	Acne Photorejuvenation Post-procedure recovery Reduction in skin melanin