Most would probably say yes in any given situation... However, this question is not "junk" related, it's about umbrellas. I've been asked by my neighbor to do senior photos and a family photo for him and his oldest son. I say, "Wonderful! Time and place?" He says 'some time in the next few weeks when our schedule's don't conflict'. Well, that's great. So I could be shooting outdoors at a forgiving time of day, or it could be during the harshest sunlight of the hour, who knows? So what I am thinking is, I should invest in an umbrella to assist in the lighting of the shots. I have a 430EX II, and I will have a pair of Cactus transmitters by the time of the shoot. What I am wondering though, does the size of the umbrella and the output of the flash have a direct effect on the quality or direction of the light? Should I just get a larger umbrella for the future? Or should I start with a small one until I get a more robust flash unit? I've been wanting to get into off camera lighting more, and now I will finally get my feet wet.