light is a major factor to yield, but so is genetics.
not everything grows donky dick colas, no matter how sophisticated you are at gowing it.
more is fine until it is too much... a plant has a maximum number of photons it can handle per day relative to atmospheric CO2 and temps etc.. (best measured as DLI - daily light integral)
so, depends on how bright that sun is... how efficient your LEDs are... you are probably fine. the attenuation from window and fewer hours is unlikely to be "too much" in any normal context. if plant ever looks super tired last 2-3 hours (extended period at end of day) or if it stunts, then you know it's probably too much.. resulting internode length can be a guide too