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Amazon.com: Sun System PAR Meter With Remote Sensor Measure Photosynthetically Active Radiation, Gray
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Amazon.com: Handheld Quantum PAR Meter Quantum Flux Meter 270 ° Rotatable Detector Measure Photosynthetically Active Radiation with External Waterproof Sensor and Telescopic Wand : Everything Else
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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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