1. **650nm (Red Light):**
- *Stimulation of Collagen Production:* Red light at 650nm is often used to stimulate collagen production, which can help improve skin elasticity and reduce the appearance of fine lines and wrinkles.
- *Enhanced Blood Circulation:* It can improve blood circulation in the treated area, promoting nutrient delivery and waste removal.

2. **780nm/808nm (Near-Infrared):**
- *Fat Cell Disruption:* Near-infrared light at wavelengths around 780nm to 808nm is typically absorbed by chromophores in the mitochondria of cells. This can disrupt the walls of fat cells, leading to the release of stored fatty acids.
- *Stimulation of Metabolism:* Near-infrared light can stimulate cellular metabolism, potentially aiding in the breakdown of fat deposits.

3. **940nm (Near-Infrared):**
- *Deeper Tissue Penetration:* 940nm light penetrates tissues more deeply than shorter wavelengths, making it suitable for reaching adipose (fat) tissue that is situated deeper beneath the skin.
- *Enhanced Fat Reduction:* Similar to 780nm/808nm, 940nm light can contribute to the disruption of fat cells and the release of stored fat.

4. **980nm (Near-Infrared):**
- *Deeper Penetration:* Like 940nm, 980nm penetrates tissues deeply, allowing for the treatment of fat deposits situated at greater depths.
- *Precision in Targeting:* This wavelength is often used for precision in targeting specific areas for fat reduction.