Attending a wedding I saw the pro using a light meter,She would have her assistant take a reading and then tell her what f stop to use, I later asked her about it and she said I would not understand and walked away.....
I felt the need at that time to go to my car get my 5D with a 24-70L , 7D with the 70-200 2.8 IS , and shoot a few beside her and her d40,, OK i am a jerk I know, but I asked her nice way befor anyone that needed to be shot was there.
I just don't know why one would need a light meter, or am I a moron??