For the best chance of reply you should post this in the light forum.
I have the 55 but never used it for Weddings but it is a great light. You might want to condiser the 66 with a 500 watt bulb as it has a sofer light since the box is bigger.
The bigger the box the softer the light. The 66 will let you use a 750 watt bulb if needed but you can't use a 750 bulb in the 55. Well you can because it fits but it is not recommended because of the heat. The 66 is more flexible bulb wise and softer.
But they are REALLY easy to use and set up. But again. put this question in the lighting forum and you will get a lot more answers.
