Sorry to post yet another thread -- I found a good web site and did some more reading, but a lot of thoughts are going through my head and I'm still as confused as ever (although that may never change).
When I look at the size and illumination of the lighting area, I'm wondering how much I factor angles into that. For example, from a 45 degree angle the circle becomes an oval 1.4 times as wide. Do I reduce the illumination figures accordingly, or do I assume that the surfaces they are hitting (i.e. sides of faces) are also angled towards the light and therefore no reduction is necessary?
And what is a good max illumination figure to shoot for? 100-200 fc?