I am slowly putting my feet into the murky waters of studio lighting. I recently bought a Bowens Gemini 500R 3 light kit. I have had no problem setting it all up and syncing (sic?) it with my camera or 580EX. In a studio situation, once I have metered for a specific shutterspeed at a specific ISO, I set the measured aperture. My question is about setting the output power of the strobes. Is this purely a creative issue, depending on the type of shot I want to create? I know the output is influenced by the setting itself, the position of the light relative to the subject and and the type of diffusion used.
I have seen videos of pros metering each light (background, focal points etc). Surely they must end up with a combination of aperture settings.
Another question. As far as TTL metering goes, can this be used with the strobes using a PW TT1 and TT5 setup or can these only be used with TTL capable speedlites?