I am still quite the rookie, being that I lack a lot of experience, my grow style is pretty much keep it in the sweet spot according to the charts, and then largely LITFA.
This has been working for me, but now I want to up my game a tick.
These are the charts I use:
My questions are where to target within the range of acceptable VPD and DLI.
For example, to achieve a VPD of 1.0 I can run 84f at 75%rH, or I can run 67f at 55%rH. Those are 2 very different conditions from an environmental control POV. Which end of the range is better for the plant? I would expect the lower temp/rH would be less energy consumed, but aside from that, is there any plant related reason to move towards one end of the range vs the other?
Similarly, for DLI I can achieve DLI of 41 many ways. Running higher ppfd for less hours, or running lower ppfd for more hours. With LEDs I doubt there is much difference in energy consumption between the two. Assuming you are respecting the photo period requirements of the plant, I am currently growing autos so that is a wide open range, which end of the range is better. For example, maybe better light penetration with the higher ppfd???
This chart tells me when to increase/decrease my nutes, I ignore MFG recommendations for the most part. Pretty cut and dry, no big range to speak of, just follow the chart.