Difference between revisions of "PAR"
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Latest revision as of 04:17, 14 February 2011
Photosynthetically Active Radiation. In the aquarium hobby this is the closest measure of useable light.
What is PAR?[edit]
PAR is a measure of light from the 400 to 700 nanometer ranges. With emphasis on the colors of the specturm that matter most to photosynthetic creatures. PAR can be measured by a PAR meter or a Quantum meter.