What is the best wavelength of infrared light for skin rejuvenation? And what is the importance of joule ratings?
The best source to answer this question is the NASA study which found that 880nm is the most effective. The DPL contains 154 of the 880nm LEDs and 20 of the 660nm red LEDS! Joules refers to the amount of energy delivered. The DPL reaches 4 joules/cm2 on the skin, like the NASA study specified, in 9 minutes. Licensed medical professional may have systems that deliver much higher joules faster, but the cost is prohibitive for the home user.
