Pretty much yeah, but knowing the strain might give you an idea what to expect. You could keep a mother plant on veg for years if you wanted to. I was informed my strain (unknown atm but they have been growin them a few years) will grow close to another 2 ft when in 12/12.
Others set grid around 30cm read up on height I'm not 100% sure, too high atm and when the the plant grows through the grid ppl will make a scrog using a grid then flip to 12/12
Others scrog, go 18/6 an extra week. Then go 12/12
Others scrog go 12/12. But don't change the bulb for a week
IMO indoors it comes down to turn around crop times wanted and amount of space/room you have