Lumen & PAR Meters

Lumen meters and PAR meters both measure how much light reaches your plants, but they do it differently. Which is better at helping you adjust grow room lighting? Learn More
View as Grid List

5 Items

Filter
15 per page
Position
Now Filtering By:
Clear All
  1. PHOTOBIO Advanced Quantum PAR Meter (Micromols)
    PHOTOBIO Advanced Quantum PAR Meter (Micromols)
    Special Price $146.75 Regular Price $163.05
    -->
  2. Digital Light Meter (Footcandles)
    Digital Light Meter (Footcandles)
    Special Price $42.80 Regular Price $47.55
    -->
  3. Hydrofarm Light Meter (Footcandles)
    Hydrofarm Light Meter (Footcandles)
    Special Price $21.63 Regular Price $24.03
    -->
  4. Sun System Handheld PAR Meter w/ Detachable Sensor
    Sun System Handheld PAR Meter w/ Detachable Sensor
    Special Price $399.91 Regular Price $444.34
    Out of stock
    -->
  5. Sun System Handheld PAR Meter w/ Integrated Sensor
    Sun System Handheld PAR Meter w/ Integrated Sensor
    Special Price $291.25 Regular Price $323.61
    Out of stock
    -->
View as Grid List

5 Items

Filter
15 per page
Position
Now Filtering By:
Clear All

Lumen meters are inexpensive and great for determining the brightness of visible light reaching your plants. They don't, however, take into account all the available light energy that may promote photosynthesis. That’s because they give more weight to yellow light over other wavelengths, and all wavelengths contribute to your plants in different ways.

PAR meters cost more but present a more accurate reading of total Photosynthetically Active Radiation (PAR) at the plants’ canopy. This includes light in the 400- to 700-nanometer range, more or less in the range of visible light, including blue and red. Plants typically use blue wavelengths for vegetative growth and red during flowering and fruit production. Whatever type of light you use—fluorescent, MH, CMH, or the newer adjustable, more efficient LED lights—having a more precise reading leads to more precise lighting, including supplemental illumination.