Reflector for light sources and light source device

A lighting device comprising:

• an array of reflectors, each of said reflectors comprising:
• a cup-shaped base portion centered around a main axis the base portion extending from a bottom opening adapted to admit a source of light radiation, to an outer rim, and
• an annular portion surrounding said outer rim, said annular portion being telescopically coupled to said base portion and moveable with respect to said base portion along said main axis in order to vary the length over which said annular portion extends along said main axis with respect to said outer rim of said base portion;
• a support structure carrying one or more of said base portions of said reflectors in the array, and
• a frame member carrying one or more of said annular portions of said reflectors in the array.