Looking good Just try er' out and tweek as needed, for personal use a 250 watt is fine and can easily handel a small SOG. My only suggestions:

1/ Tall skinny pots for your plants
2/ Keep the light 8-10" above the canopy
3/ Label and clone your plants, if one of them turns out to be a monster bud producer 6 weeks into flower it will be too late to clone and having a high yielding mother plant is a big part of successful cultivation