Light source, lamp, and method for manufacturing a light source

A method of manufacturing a light source comprising:

• forming a light unit by distributing a plurality of light emitting diodes in a spatial arrangement of the plurality of light emitting diodes, the spatial arrangement having a center position, the plurality of light emitting diodes including at least two different types of diodes, each type of diode being configured to emit light within a different wavelength range;
• molding a hollow curved cap being substantially transparent to radiation emitted by the light unit, the cap being provided with an axially symmetric protrusion forming an exposed depression in the exterior of the cap;
• and
• placing the cap over the light unit so as to cover it, wherein the placement is such that a surface of the protrusion, which is convex with respect to the plurality of light emitting diodes, at least partially defines a cavity in which the plurality of light emitting diodes is disposed, and the symmetry axis of the protrusion substantially coincides with the center position of the spatial arrangement of the plurality of light emitting diodes.