I have a bride that wants to do family/wedding party portraits in front of the alter and hoopa they have set up inside a hotel ballroom, low light setting, hoopa lit at each of the four posts from the floor. The main downlights and chandeliers in the ballroom are on dimmers, so we can play with those. Also, the walls will be bathed in white cloth with blue led's shooting up the walls. Do you think that for a group of a maximum of probably 16 people in one shot that I'll be able to produce sufficient light for the group from my 580EXII with Cloud Lightsphere? Any suggestions on how to arrange that many people in that setting, probably won't be any stairs either? This would be a shot with the entire wedding party together. Or do I need to consider bringing in additional lighting? If so, WHAT?!!