
Understanding LED Grow Lights and PAR Readings
Understanding Spectrum and Par Reading When it comes to measuring the amount of effective light an LED, HID, and fluorescent light fixture emits for a plant to use, there are two primary measurements that should be read and examined together. First, PAR or Photosynthetic Active Radiation needs to be measured. PAR is essentially a measurement of light emission within the photosynthetic range of 400-700nm. This represents the area of light...