The McCree Curve, the authoritative reference on measurement of light as it affects plants, commonly known as Photosynthetically Active Radiation (PAR) can be seen in Figure 1.Â This curve clearly shows that plants will use light (photons) delivered across the entire visible spectrum for photosynthesis.
It is our goal to mimic this curve as closely as possible to provide more usable photons to your plants. By not producing excess light in any specific frequencies, our LEDs lack a property commonly known as penetration, whereby light penetrates canopy (top) foliage to get to the underlying green leaf matter. This penetration is a function of excess light in frequencies that cannot be used by the plant due to sheer photon saturation in those frequencies. A common technology that is known for its penetration is High Intensity Discharge lighting, especially High Pressure Sodium (HPS) lights.
The sheer abundance of light produced by HPS lamps produces fair harvests in most plants, but almost all of the energy used by the technology is wasted, either as heat, or due to the aforementioned saturation of a plants photosynthesis centers (chloroplasts), seen as wasted light in Figure 2.