1. A lighting system, comprising:a solid state lighting device capable of generating mixed light, the solid state lighting device including
a first light source configured to produce light having a first peak wavelength, and
a second light source configured to produce light having a second peak wavelength that is different from the first peak wavelength;
a one spectral sensitive color sensor configured to be capable of detecting light from only the first light source multiple times during a period of time;
a controller coupled to the solid state lighting device and the sensor and configured for independently controlling each of the first and second light sources, the controller being programmed to compensate for color shifts of the second light source by controlling each of the first and second light sources to produce mixed light based on a signal from the sensor and without the lighting system detecting light from the second light source over the period of time and without utilizing a signal from any temperature sensor for monitoring operation of the first light source and/or the second light source; and
memory containing instructions for causing the controller to determine operation of the second light source based on a predetermined relationship between light from the first light source detected by the sensor and operational characteristics of the second light source, wherein the determined operation of the second light source is used by the controller to compensate for the color shifts of the second light source,
wherein the substrate carries the first light source, the second light source, and the sensor.