Lighting Assembly, a Light Source and a Luminaire

A lighting assembly comprising:

• a primary thermal layer of a thermally conductive material,
• a plurality of Light Emitting Diode assemblies, and
• a plurality of wires being electrically coupled between electrodes of at least two different Light Emitting Diode assemblies,
• wherein the Light Emitting Diode assemblies comprise:
• a sub-mount of a thermally conductive and electrically insulating ceramic, the sub-mount having a first side being thermally coupled to the primary thermal layer and a second side being opposite the first side,
• a first and a second metal electrode arranged at the second side of the sub-mount,
• a Light Emitting Diode die being electrically and thermally coupled with an anode of the Light Emitting Diode to the first metal electrode and with a cathode of the Light Emitting Diode to the second metal electrode, and
• a secondary thermal material (306) being thermally conductive and electrically insulating and being thermally coupled to the primary thermal layer, the secondary thermal material being arranged in between a subset of the plurality of sub-mounts and in between a subset of the plurality of Light Emitting Diode dies for encapsulating a subset of the plurality of wires and extending beyond an imaginary plane formed by top surfaces of the Light Emitting Diodes dies and forming walls of cavities comprising the Light Emitting Diode dies.