une Energie parRegions is a software for detecting lines on satellite images. http://citeseer.ist.psu.edu/merlet95elieser.html elieser: manuel utilisateur (researchindex) -
You could say that plants "eat" light radiation - we call it PAR Radiation when the light is of a wavelength...PAR...This means for every 1000w you are burning only 20 - 30% of these older...Basically "PAR" stands for Photosynthetically Active...