The first chart in this thread is a calibration chart for temperature compensation. When you are calibrating your pH meter with those specific buffered solutions you can make it a little more accurate by using temperature compesation. If you have a $1500 bench meter and need to know the pH within .01 then this chart is important.
Here are a couple of good lighting charts from Caligrower.
\
These charts are good to use, to make sure you do not exceed 100% PAR when the buds are ripening, to prevent burning all flavour from out of them.
In late flower stage you should move the lights to 50-75% PAR.