The SpotOn Quantum PAR Light Meter accurately measures all types of light sources, including LEDs. It features three modes of operation to monitor lighting: instantaneous PAR light readings, scan function (calculates coverage area average) and Daily Light Integral (measures cumulative total amount of PAR that reaches plants during a 24-hour photoperiod). Its $295 USD list price makes it affordable to hobbyists, small growers, large growers requiring multiple units, researchers, educators and anyone relying on artificial light to grow plants.
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