Nowadays, most global computer networks where traffic takes place over long distances is connected to fiber optics. The operation of the light fixture is based on the laws of the optics on which the transmission of light signals is based. With the help of fiber optics, extremely large amounts of data can be transmitted as opposed to radio and telephone communications, which ensures the increasing use of fiber optic transmission systems in all branches of human activity. Their wide application is also influenced by the quality of portable properties, small dimensions and resistance to external influences. The most significant property of fiber optic transmission systems is attenuation while the other features don’t have much impact. Nowadays, glass is usually used as fiberglass material. Those made of plastic mass are used in industry because of low prices. The luminaires must be as transparent as possible to reduce the losses during the transmission of the light signal, and as an optical transmitter it is best to use the LEDs due to low prices and high reliability. Significant applications are found in marine and medicine, especially in laser medicine, which today is the foundation of modern technology in medicine, as well as on marine vessels where fiber technologies are used for regulation and control.