I am new to this forum so I know my opinion wont be very credible, but I have seen some amazing grows with led lights from veg to flower. You just have to adjust your grow style if your use to using mh/hps.
You know that blackstar has two different 240 watt models one for flowering and one for vegging right? i believe yours is the flowering model. and the actual watt pull is only 130 so your looking at almost 1/4 the power cost...