A luminaire is for use in a lighting apparatus that includes a plurality of luminaires and a computerized device. The luminaire includes a plurality of lights and a controller. The luminaire is operated to emit source light characterized by a dominant source light wavelength within a range from 390 nanometers to 750 nanometers, and with a different dominant source light wavelength than the source light of at least one other luminaire in the lighting apparatus, and such that the source light emitted by the luminaire is combined with the source light emitted by the at least one other luminaire to form a combined light. The dominant source light wavelength of the luminaire is variable with time, and the controller operates the plurality of LEDs such that a color temperature of the combined light does not vary more than 5% across the length and width of the area of illumination while the dominant source wavelength varies with time.