The present invention relates to a lighting device (100) (100), comprising at least one light emitting element (102) configured to emit light, a housing (300) having an elongated hollow base portion (302) and a light exit portion (304), wherein the elongated hollow base portion (302) has a polygonal cross section, and a heat transferring arrangement (200) formed from a folded sheet of a thermo conducting material inserted into and fixed inside of the housing (300), the heat transferring arrangement (200) comprising a first section (202) onto which the light emitting element (102) is arranged and adapted to receive heat generated from the at least one light emitting element (102) when emitting light, and a second section (204) having an outer surface which once fixed inside of the housing (300) is formed to be in abutment with an inner surface of the elongated hollow base portion (302) of the housing (300), so that the generated heat is thermally transferred to the housing (300). The present invention also relates to a corresponding method for forming a lighting device (100).