I'm not a carp fisherman, but I did read an article about carp fishing in the July 2014 edition of In-Fisherman that may be of interest to the carp fishermen discussing this thread.
The previous is a photo I took of the article and copy/pasted into this note. These words are not mine, but are taken directly from the magazine.....
I found the last sentence to be very interesting, leading me to believe that if I were to be chasing carp, it would behoove me to go fishing 4-6 hours after sunset, seeing as how feeding activity was TEN TIMES GREATER then than in the daylight.