Technologies are described for systems and devices to provide photosynthetically active photons to a plant. The systems may comprise an above canopy light source. The above canopy light source may be an electromagnetic radiation device. The above canopy light source may be located above a canopy of the plant. The above canopy light source may emit photosynthetically active photons of a first intensity downward, towards a canopy of the plant. The systems may comprise an under canopy light source. The under canopy light source may be an electromagnetic radiation device. The under canopy light source may be located below the lowest branches and leaves of the plant. The under canopy light source may emit photosynthetically active photons of a second intensity upwards, away from a root system of the plant. The second intensity may be 0-50 percent of the first intensity.
