I'm using a Nikon D60 and was asked to shoot a candlelit wedding in November and was wondering what type of flash I need? I've done some research but I'm not sure of the difference between dedicated and non-dedicated. I'm more of an intermediate photographer. I know a little, but not near what I would like too. I know it takes some time to practice with the flash and learn to use it properly, that's why I'm trying to find something early. Any help will be greatly appreciated!