I'm relatively new to growing with liquid nutes and have learnt in a couple of grows what I should be giving my plants, but now I'm growing a mix of unfamiliar autos and photos and have already learnt what too much means too early.
I'd up the nutes going into stretch and flower and try and work out how much they will need under your lights. Lighting effects nute requirements, so does the rest of the environmental factors but above all the strain your growing I think.