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Today, the plates in the TDP lamps contain 43 minerals that are found in the human body. The majority of the lamps offered today are far-infrared lamps. Light-Emitting Diode (LED) Lights According to Barolet (2008), “Light therapy is one of the oldest therapeutic modalities used to treat various health conditions. Sunlight benefits in treating skin diseases have been exploited for more than thousands of years in ancient Egypt, India, and China” (p. 227). Regarding the technology of LEDs, Barolet wrote, LEDs are complex semiconductors that convert electrical current into incoherent narrow spectrum light. LEDs have been around since the 1960s but have mostly been relegated to showing the time on an alarm clock or the battery level of a video camera. They have not until recently been used as sources of illumination because, for a long time, they could not produce white light – only red, green, and yellow. Nichia Chemical of Japan changed that in 1993 when it started producing blue LEDs which, combined with red and green, produce white light, opening up a whole new field for the technology, just like computer processors, and are increasing in brightness, energy efficiency, and longevity at a pace reminiscent of the evolution of computer processors. Emitted light is now available at wavelengths ranging from ultraviolet (UV) to visible to near infra-red (NIR) bandwidth (247 to 1300 nm). (p. 227) The National Aeronautics and Space Administration performed research on using LEDs to stimulate the healing of wounds. Explaining the use of LEDs to stimulate healing, Whelan (2002) wrote, NASA LEDs stimulate the basic energy processes in the mitochondria (energy compartments) of each cell, particularly when near-infrared light is used to activate the 43PDF Image | Light, Sound, Vibration for Healing and Stress
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