Adaptive photosynthetically active radiation (par) sensor with daylight integral (dli) control system incorporating lumen maintenance

An artificial grow environment system, comprising:

• a luminaire configured for illuminating an artificial grow environment below the luminaire, the luminaire including a light shield housing at least one LED light;
• a constant current LED driver operatively coupled with the LED light and including a dimming input;
• a first light sensor coupled to the light shield and separated from the LED light thereby so as to be isolated from the LED light and receive ambient light in the artificial grow environment;
• a hemispherical incident, translucent light housing surrounding the first light sensor and configured to accept light from above or from the sides in the artificial grow environment;
• a second light sensor isolated from all light;
• and
• a circuit configured to supply 0 to 10 VDC to the dimming input of the constant current LED driver such that the LED light is linearly dimmed, from full-on to full-off, in inverse proportion to an amount of ambient light received by the first light sensor as temperature-compensated in accordance with data collected by the second light sensor.