I am building a small portrait studio (you may have seen other posts of mine) and I will be using Hasselblads with BW film. I am trying to decide on the power of the strobes I will need. Considering that I will be probably using film speeds between 50 and 100, appertures between 2.8 and 11, softboxes and umbrellas and distances no further than a meter or two, would 500W be enough, or should I go for more? I am not planning to develop to a large studio, as my work will be mostly photojournalistic and not fashion or commericial, so I am not sure if I will be needing stronger lights in the future. Furthermore, a large format camera is not in the present budget or even a thought as I prefer to master my present equipment before moving to something else.