This table shows the sensor’s output under varying light sources. The sensor’s spectral response, the spectral output of electric lamps, and these errors are all constant— allowing the user to calculate the correct output for each light source.

For example, if Model SQ-120 is used in sunlight, and a value of 1,500 µmol m^-2 s^-1 is given, the actual light is 1,650 µmol m^-2 s^-1.

In a controlled environment with multiple lamp types (such as a mixture of MH and HPS), a more precise percent error can be determined when the amount (%) of each type of light present is known.

This graph compares the spectral output of these light sources .