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The SpotOn Quantum PAR Meter measures PPFD on plant canopy. Scientifically accurate for all light sources. Measures DLI too.
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Quantum Par Meter - High Precision, Rechargeable & Long Standby, Grow Light meter, Indoor Plants meter, Good for Growing droseras and All Indoor Plants… : Patio, Lawn & Garden - Amazon.com
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Product Review: Apogee Instruments' MQ-500 Quantum Meter with Notes on Why Measuring Light Intensity is Important
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Amazon.com : Quantum PAR Meter - High Precision, Grow Light meter, Indoor Plants meter, Good for Growing droseras and All Indoor Plants,Rechargeable : Patio, Lawn & Garden
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Par Meter Lux Meter Ppfd Luminous Intensity Measurement Photosynthesis Light Quantum Meter Accurate For Grow Light 400-700nm - Grow Light Parts & Accessories - AliExpress
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