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Error Correction For Different Light Sources

Because the spectral response of a quantum meter sensor and the spectral output of electric lamps is constant, the errors under different lamp types can be calculated. Use the table at right to determine the conversion factor required for each type of meter calibration.

The error under a combination of incandescent and fluorescent light depends on the ratio of the two light sources. For example, if the incandescent is 10% of the total PPF, the meter reading would be 2% low (i.e., 20% of 10%).

Spectral Response of Quantum Meter Apogee Sensor

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Electric Light Calibration Sunlight Calibration
Lamp Type Error Lamp Type Error
Cool White Fluorescent 0 Cool White Fluorescent 10% high
Metal Halide 2 % low Metal Halide 8% high
High Pressure Sodium 2 % high High Pressure Sodium 12 % high
Sunlight 10% low Sunlight 0
Incandescent 18% low Incandescent N/A

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