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 sensors measure light energy at the specific wavelengths plants actually use for photosynthesis. Research indicates that older lux and foot-candle meters could have error rates up to 45% when used to estimate light quantum available for plant growth. Start taking more meaningful light level measurements yourself with a low-cost quantum meter.
All quantum meters here measure Photosynthetic Photon Flux (PPF) as µmol m-2 s-1 for Photosynthetically Active Radiation (PAR) in the range of 400 to 700 nm. Quantum meters can be used in the field, laboratory, above or below plants, in growth rooms and greenhouses. The meter approximates radiation between 400 and 700 nanometers(PAR) as umol m-2s-1.
Now also available with external sensor on 2-meter cable.
Ordering Information:
3415F LS Quantum Meter
3415FQF LS Quantum and Foot-Candle Meter
Other LightScout Light Meters and Sensors
LightScout DLI 100 Light Meter
3405B3 LightScout DLI 100 Light Meter (set of 3)
3405B LightScout DLI 100 Meter (Single Pack)
3412 LS Red / Far Red Meter – includes carrying case
3414F LS UV Meter
3415FSE LS Dual Solar / Electric Quantum Meter
3415FXSE LS Dual Solar / Electric Quantum Meter – External Sensor
3413F LS Foot-Candle Meter
7500 Soft-Sided Carrying Case