The invention provides a light emitting device having an array of light emitting diodes (LED). The array of the device is arranged to illuminate a surface area of a scalp and the LEDs exhibit a plurality of wavelengths within the near infrared region of the electromagnetic spectrum between about 600-1000...http://www.google.com.au/patents/US20060161226?utm_source=gb-gplus-sharePatent US20060161226 - Apparatus and method for reducing follicular cell apoptosis
