Created with Sketch. Created with Sketch.

PAR Light Measurement

PAR (Photosynthetically Active Radiation) is a measurement process to detect the exact amount of light available for photosynthesis. Detecting this light, especially in the 400-700 nanometre wavelength is crucial, as this is the actual amount of usable light for plants. Using a PAR meter is critical, as this wavelength of light is not visible to the naked eye.

Lumen Meter

Lumen meters are similar to PAR meters in that, they measure the amount of light emitted from Grow Lights. Lumens are the measurement of light a bulb produces, therefore, the higher the lumen, the brighter the light. For optimum plant growth, 7000 lumens or more is perfect, but atleast 2500 lumens are acceptable. For indoor plant growers, measuring light both by PAR and Lumen meter is acceptable. However, keep in mind that a PAR meter provides a more accurate reading to ensure that plants receive enough light for photosynthesis. At, we carry a wide selection of Par and Lumen meters to help you grow successfully. Visit our Grow Blog to learn more about Grow Lights or call us at 866-GRO-INDR to get more information about Par and Lumen meters or any other questions you may have.


  • Hydrofarm Digital Light Meter (Footcandles)

    Hydrofarm Digital Light Meter (Footcandles)

    Measures grow lights or sunlightMeasures up to 5000 footcandles3 scales for precise readingsConvenient hand-held remote sensorLifetime silicon cell - includes battery, informative booklet with lighting recommendations and carrying case

    $57.36 $44.06
  • Hydrofarm Light Meter (Footcandles)

    Hydrofarm Light Meter (Footcandles)

    Photosynthesis & Plant Growth depend on the sun or specially designed lighting systems. But of that light reaching the plant, only specific types of energy (in the lighting spectrum) drive the photosynthesis process. Since light is the most important...

    $52.80 $15.37
  • PHOTOBIO Advanced Quantum PAR Meter

    PHOTOBIO Advanced Quantum PAR Meter

    PHOTOBIO Product DocumentsPHOTIOBIO PAR Meter Instructions All-new for 2020, the Advanced Quantum PAR Meter provides an accurate and cost-effective measurement for all light sources used to grow plants. The PHOTOBIO by Phantom Quantum PAR meter is...

    $207.99 $172.95

Most Popular