Final answer:
Green light is used in LED therapy to reduce hyperpigmentation. Different colors of LED light address various skin issues, with green light being effective for pigmentation due to its specific wavelength that targets melanin in the skin.
Step-by-step explanation:
In LED therapy, green light is used to reduce hyperpigmentation. This type of light therapy targets melanin in the skin and can help to break it down, which leads to a reduction in dark spots and an overall evening of the skin tone.
LED therapy operates at various wavelengths and each color of light can target different skin issues. For instance, blue light is often used for its antibacterial properties, particularly in the treatment of acne, while red light is used for its anti-inflammatory and anti-aging benefits. Conversely, green light falls between red and blue light on the electromagnetic spectrum and is thus ideal for addressing pigmentation issues.
The effectiveness of LED therapy in terms of pigmentation is related to how the skin absorbs different wavelengths of light. Since hyperpigmentation involves excessive melanin production, specific wavelengths like green light can be absorbed by these pigment cells, helping to break them down and fade hyperpigmentation over time.