I am wondering why I said I would do this. Anyway, I am supposed to take pictures of approx. 100 3 and 4 year olds at a preschool on the 24th & 25th. I believe I will just rent lighting equipment so that I don't make the costly mistake of buying the wrong equipment. I am thinking that I would like to have the main light (softbox), reflector for fill, grid light for backdrop & possibly another light (softbox?) for hair light. Is a hair light overkill for 3 & 4 yr. olds? Should I use the second light for the hairlight or should I use it as the fill? I own a Canon Speedlite 580EXii already, should I use it as fill? I would love to figure this out on my own. However, I am doing this more as a favor to the school. Right now I am concentrating on more "non-studio" stuff, that is keeping me busy! So, I guess I'm looking for advice from someone who knows more then I on studio lighting. This is an upper end community & potential clients otherwise, so I want to take the opportunity to show them some nice photography. Thank you in advance!