HID vs CFL

[Hagbard Celiene]

violet 380â??450 nm
blue 450â??495 nm
green 495â??570 nm
yellow 570â??590 nm
orange 590â??620 nm
red 620â??750 nm

obviously, if PAR is between 400-700, lumens wouls not be an exact representation of the plant useable radiation a plant can use. and PAR is exppressed in a value, its actually PAR lumens...