By means of feed network (1) the electric energy is brought, from the public body delivery point, to a diffuser system (2). Said system sheds the radiation, delivered by an artificial light source, on a terminal of a some number optical waveguide (3) which by means of a distribution conductors, placed on one or more risers (4) foreseen to supply on a wall part a group of flanked and superimposed cemeterial burial niches, light up each a grave slab coming out with their other terminal into socket (5).
展开▼