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Not Available Improved wound healing may have multiple applications, which may benefit civilian medical care, military situations and long-term space flights. In space wounds may heal differently than here on earth. Laser light has shown some benefit for wound healing, but has limited surface area and wavelength. Advances in semiconductor technology, developed for NASA's long range life support missions, have led to the development of light emitting diode systems capable of high irradiant output equivalent or superior to laser sources being used in wound healing today. These LEDs offer the potential for dramatic improvement in wound healing over lasers for future space flight, civilian and military applications.