Light therapy devices, namely, sensory light therapy unit and an electronic light therapy apparatus for the skin; sensory light therapy units for sleep therapy; light therapy units for providing gradual change in light intensity to simulate dawn or dusk for treating winter blues, jet lag, fatigue, and enhancement of weight loss or diet programs; light therapy units for increasing alertness and concentration; light therapy units for providing light for treating winter blues, jet lag, fatigue, and enhancement of weight loss or diet programs; medical devices for nonsurgical cosmetic treatments for providing light to improve skin appearance, for treating wrinkles, or for treating acne; Electronic aesthetic skin treatment devices using light emitting diodes, namely, infrared, red, orange, yellow, green, and blue wavelengths for generating light rays; Light emitting devices, namely, lamps and LED devices for treatment of a variety of skin conditions