Light fixture having profile shaping element of dynamically controllable temperature

Alight fixture, comprising:

• a light source for emitting a source light beam containing effective light rays and ineffective light rays;
• a profile shaping element for shaping the source light beam, which is formed with a light transmission portion for the effective light rays in the source light beam to pass through and provided with a profile shaping driver for changing an area and/or a shape of the light transmission portion;
• and
• a light shading element arranged between the profile shaping element and the light source, which comprises at least three light shading blades arranged circumferentially around the effective light rays, and at least one blade driver independently driven relative to the profile shaping driver, wherein the at least one blade driver is configured to drive the at least three light shading blades to cooperatively block at least portion of the ineffective light rays in a way that the adjacent light shading blades are partially stacked on top of one another and keep the at least three light shading blades beyond the effective light rays, in response to the area and/or the shape of the light transmission portion being changed by the profile shaping driver.