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Light Meters
   
Light has three principal characteristics that affect plant growth: quantity, quality, and duration. Light quantity refers to the intensity or concentration of sunlight. Light quality refers to the color or wavelength reaching the plant surface. Light duration or photoperiod refers to the amount of time that a plant is exposed to sunlight.
   
  Quantum Light Meter
Quantum sensors measure light energy at the specific wavelengths plants actually use for photosynthesis. Start taking more meaningful light level measurements yourself with a low-cost quantum meter.

Multi-Sensor Quantum Light Meter
Quantum sensors measure light energy at the specific wavelengths plants actually use for photosynthesis. Gather spatial average PAR readings to measure how much light reaches your plant.

UV Meter
Monitor critical UV rays. This meter measures the UV radiation between 250 and 400 nanometers, and is measured in µmol m-2 s-1 (micromoles of photons per square meter second).

Foot Candle / LUX Meter
Measure light level in Fc or LUX over three ranges.

Greenhouse Weather Tracker
Measure your plants' most important inputs: light exposure and temperature. Also tracks degree days and chill hour data.

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Light Sensors
   
Light has three principal characteristics that affect plant growth: quantity, quality, and duration. Light quantity refers to the intensity or concentration of sunlight. Light quality refers to the color or wavelength reaching the plant surface. Light duration or photoperiod refers to the amount of time that a plant is exposed to sunlight.
   
Quantum Light Sensor
Capture radiation between 400 and 700 nanometers (nm) to calculate daily light integral with this Quantum Light sensor.

Silicon Pyranometer Sensor
Capture solar radiation between 300 and 1000 nanometers (nm) to calculate daily light integral with this pyranometer sensor.
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