I have a question regarding the "watt/sec" rating of flash heads. I'm a serious amateur photographer who is considering upgrading my ligting to a set of professional heads with a softbox or honeycomb grids. My "studio" (i.e. family room) is about 12 x 18, with much less of it usable for photography.
What output head(s) should I start with? 500 w/s, 1000w/s, or something more or less than that? And is there a rough conversion from my camera-mounted flash rating (Guide Number) to the w/s rating?