A compact PAPI having a semiconductor light source and finely distribution of lights is herein proposed. The novel PAPI (100) includes two artificial light sources (10, 20) each with a plurality of semiconductor emitters (11, 12, 13) as well as two convex (30, 40) and two planar reflectors (50, 60), one for each artificial light source (10, 20). The convex reflectors collect light (L1,L2) emitted by the plurality of semiconductor emitters (11, 12, 13) of the first and second artificial light sources (10, 20) and gather the collected light (L1, L2) to the planar reflectors (50, 60) as output of the PAPI (100).
