250hps watter here. I say for the size your plant your doing good ( I keep my plants with in 3 feet). I am not a pro by all means ,I learn every step of the way. Keep everything in check as to ph and utilize your light,meaning If you have a cool tube you can get pretty close considering the heat isnt as much as a 400 produces. I like the results from my harvest. Its not the biggest compact buds but it also isnt fluffy, but with good nutrients you can really get them to florish. If by all means add the cfls for siding and to utilize the light even more by pre tieing your branches ( i simply just get some sting and bend the top colas ever so lightly so they are leaning) so light can get to every bud sight. Again with a 250watt the light intensity deminishes after 15inches imo say. so keep it short and simple, ..but before i leave i would like to state,last grow I did I had 6 clones vegged for 1 month and flowered. Keeping them short and not going to over board. I grow in a crawlspace 4x4x4 so height also is another issue but bending fixes this as they just curve right back up, I wish I could type more and give more input but I am just to blazing tired. keep the updates coming along.