S
StealthyStalks
OP:
One more thought, please poke holes in it if you see any:
The most ideal method would probably be using PPFD weighted to Quantum Yield (QY). Then replace the kWh datum that QY datum because it's much more accurate to compare grows or evaluate grows (energy/time/yield) with photons plants use (PPFD) verses the kWh used by the lamp+ballast (where much of the energy is lost as non-PPFD quanta and heat). But, to use QY one needs at least a quantum senor, data logger and good math skills, so using kWh is the most feasible, if not the most ideal.
You are abosolutly correct! I just don't have a way of measuring flux density so it would be beyond my means. Again, good info!
Up the rep...