Table 3 -.

Optical parameters of the light-emitting device and photobiomodulation therapy using LEDs (light-emitting diodes)

Number of LEDs	200 (100 infrared and 100 red)
Wavelength	830 ± 20 nm (infrared) and 630 ± 10 nm (red)
Frequency	Continuous
Optical power (each array of 4 LEDs)	80 mW (infrared) and 80 mW (red)
Total device power	2 W (only infrared turned on)
Area of each LED	0.2 cm2
Device emission area	612 cm2
Irradiance (each array of 4 LEDs)	114.28 mW/cm2 (infrared) and 0 mW/cm2 (red)
Irradiation time per each site (sec)	30, 50, 120
Total energy per site (30 s)	0 J [infrared 0 J (25 × 0 J); red 0 J (25 × 0 J)]
Total energy per site (50 s)	100 J [infrared 100 J (25 × 4 J); red 0 J (25 × 0 J)]
Total energy per site (120 s)	240 J [infrared 240 J (25 × 9.6 J); red 0 J (25 × 0 J)]
Number of sites	8 (four muscle groups on each side)
Total energy per session (30 s)	0 J
Total energy per session (50 s)	800 J
Total energy per session (120 s)	1,920 J
Fluence – 30 s	0 J/cm2 (infrared) and 0 J/cm2 (red)
Fluence – 50 s	5.71 J/cm2 (infrared) and 0 J/cm2 (red)
Fluence – 120 s	13.71 J/cm2 (infrared) and 0 J/cm2 (red)
Method of application	Device in contact with the skin, at 90° and with light pressure