Preface: On the digital side of photography I use flash comfortably, but on the film side I want to see in advance how the light is going to wrap around my subject. Question: Suppose I want to take a half body portrait at ISO 200-400 and f5.6-f8. Does anyone have a ballpark suggestion for what wattage I need from continuous lights? To make this trickier I would mostly be shooting with some natural light (maybe ISO 200 f 2.8 worth of it). So I'd need enough light to increase exposure by another say 3 or 4 stops. When I ask about wattage I'm talking about incandescent wattage. I understand for CFL and LED the actual wattage will be lower. Addendum: I'd be shooting through a 48" Octagon softbox and/or 16" beauty dish with soft diffuser. Thanks for your time and input.