Modular fixture and sports lighting system

A light assembly comprising:

• a housing;
• a lamp disposed in the fixture housing;
• a first reflector shaped and positioned with respect to the lamp such that the reflector collects light emitted from the lamp to create a converging beam with limited angular mixing at a surface that is located a predetermined distance from the lamp;
• a photometric module connected to the housing and including a second reflector disposed generally along the surface, wherein the second reflector is shaped and positioned with respect to the first reflector such that the photometric module generates a photometric beam shape that uniformly illuminates at least substantially the entirety of a playing surface.

A method for determining the shape of a photometric module reflector for use with a light source and a reflector of a light fixture, the method comprising:

• defining a design area to be lighted having a lighting profile coordinate that refers to a desired value of vertical or horizontal illuminance;
• selecting a mounting location of a light fixture with respect to the design area;
• computing a polar angle and a luminous intensity value from the fixture for each profile coordinate to define a multiple of the desired value of luminous intensity from the fixture;
• transforming the polar angles and luminous intensity values of the computing step to create an at least substantially uniform polar grid of polar angles and luminous intensity values;
• creating a map of power density and direction at a surface of the photometric module reflector using the optical properties of a reflector and a light source fixture;
• subdividing the surface of the photometric module reflector into surface elements of approximately equal energy;
• aiming the surface elements to direct energy along output directions in proportion to the uniform polar grid;
• and
• iteratively reshaping the surface of the photometric module reflector by comparing the luminous intensity and polar angles of the reshaped surface using the optical properties of the lamp fixture until the luminous intensity and polar angles generated by the photometric module reflector are acceptable compared to the uniform polar grid.