Two energy gaps in superconducting Lu2Fe3Si5 single crystal derived from the temperature dependence of lower critical field Hc1(T)

► Two well refined values of the superconducting gaps have been derived from our experimental data. ► Temperature dependence of λab-2(T) has been determined. ► Fundamental Uemura plot, widely used for all classes of single-gap superconductors, requires a substantial revision in those of two-band superconductors. ► New universal relation between λ−2 and Tc should be proposed for two-gap superconductors.