Electronic aesthetic skin treatment devices using light emitting diodes, namely, infrared, red, orange, yellow, green, and blue wavelengths for generating light rays; Electronic light therapy apparatus for the skin; Electrically-powered apparatus for treating skin by applying low level light and sonic vibrations to the skin; Devices for measuring blood sugar; Cosmetic apparatus, namely, light based devices providing mainly pulsed light for performing non-ablative aesthetic skin treatment proc...