Turf-Tec International Daylight Indicator
– Light Meter - Copyright 2020
Light Intensity
The light that drives photosynthesis in plants is Photosynthetically
Active Radiation, or
PAR light. This is also referred to as Quantum
light, because it is measured in units of
moles striking an area over
time. Though PAR light ranges from 400 to 700nm, the
region
brightest to human eyes is the area of least effect on plants.
Light meters measure
light intensity
– the instantaneous amount of
light delivered to
an area. During the 24-hour Light Gathering period,
the Daylight Indicator functions as a
light meter.
