I am purchasing three lights from Alien Bees. I am going to be setting up a home studio. I have a Nikon D70, the backdrop stand and many backdrops. I also have a good light meter so I am all set on that also. My question is......I am buying 3 lights. Do I need a light stronger than the Alien Bees B400. I was going to buy 3 B400's but I don't want to be to over powered or under powered. It will be mostly for children and maybe groups up to 4 or 5. Do I need a B800?? Any info would be a great help. Thanks, Michelle;)