Modern Light Sources on the Ship

The paper deals with studies on light flicker in selected modern light sources used on ships. The authors present and discuss the relationship between the hostile ship environment affecting the ship light systems and the extreme working conditions of the ship's crew manifested by health problems and a reduction in their manual abilities. These limitations result from the flicker phenomena provoked by both fluorescent lamps and LED technology sources. The authors showed that the traditionally used flicker analysis based on <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$\boldsymbol{P}_{lt}$</tex> and <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$\boldsymbol{P}_{st}$</tex> indicators is not sufficient to assess the effects related to the operation of a modern lighting system, because in addition to voltage fluctuations, the properties of the source, i.e. light intensity as an input signal, must also be taken into account. This approach based on <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$\boldsymbol{F}_{i}$</tex> and <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$\boldsymbol{F}_{p}$</tex> coefficients was verified experimentally using the dedicated author's setup. The presented discussion of the measurement results showed that the approach used so far to assess flicker phenomena has some weaknesses and ambiguities concerning LED technology sources.