peevo

ok my new found friends here it is ,i just purchased a 250 watt setup.33000 lumens.my area is 3x2x4.roughly 5500 lumens per foot not the best but surely not the worst. im shooting for scrog.
1)my reflector is 7" high wich leaves me 3'5" is this enough space for my growing.
2)will this area also be enough to start some plants so i can sex them and grab some clones and then start the scrog?
3)how big should my pots be?
"the more you know the more you could grow"