What's up man. I'm new to this grow thing as well. If u wanna go the hps route then a 250 will be more than enough for 1 plant. Plus do u have space constrictions or is that not an issue? I have 4 plantas and I did four 4ft flour 6500k and two 42 watt cfls. My setup is real cheap. Mos def if moneys no object the hps is the way to go. But if it is. Something like my setup is enough light