The source of light with high power LED diodes

This paper presents information about design of light sources. The special light source was designed and constructed for the research activity on the lichen structure in the Antarctica. This research is made by the Institute of Experimental Biology, Masaryk University, Faculty of Science. Required properties were continuous spectral characteristic with respect to photosynthetically active wavelength area, possibility of luminous flux regulation and practically zero thermal effect to illuminated object. Owing to new high-performance LED this type of light source was selected. Design of light source consisting of high efficient white LED´s, as well as experimental results, are presented.