**8. Conclusion**

**Figure 21.** Outcome of treatment for stretch marks.

248 Advances in Bioengineering

**Figure 22.** Prototypes that are being manufactured.

**7. The future of LED therapy**

each color has its application and its therapeutic purpose.

including acne, stretch marks, cellulite, skin blemishes and scarring.

The Figure 22 shows some prototypes that were manufactured to perform the therapy.

The application of high brightness LEDs in human tissue has been growing every day. Several scientific institutions have explored this theme. Many researches are underway on the use of therapy with the LED in order to improve their application and to determine if there are other applications which may be used. The therapy is applied within the visible light spectrum and

The red color that is in a range of 600-700 nanometers, is effective in human tissues and shows excellent results in wounds and sores. The higher wavelengths, including infrared, are more sharp and can reach the bone. Studies also suggest that the spectrum between 400 to 500 nanometers, in the range of blue color, can be effective in the treatment of skin disorders,

The application of LEDs in interaction with the human tissues shows a great interest of manufacturers and researchers. The correct use of LEDs in this context directly depends on the tissue nature where it wants the light to interact [10].

Several parameters are important for satisfactory results, such as wavelength, the kind of color, temperature control of the LED, the characteristics of the used converter, control the brightness, output current, duty cycle and all the observations made in the previous sections of this work.

This is because a small spectral change can lead to a major shift in the lighting characteristics. LEDs are increasingly becoming a great option to help cure various diseases and to prevent others [18].

Thus, this work contributed to the development of LED application in human tissues showing that the effect of the emission of light through the high brightness LEDs offers a new treatment option for opening new ways of therapeutic technique LED Therapy applied to human tissues [20].
