I have discovered that with my limited skills, casting the 4 weight is challenging in really dark areas. Many homes are not well lit, which is nice, but is doesn't help with visibility. I can't see the line while casting, and frequently when I let the fly hit the water as an indicator, even the small splash (which doesn't seem to spook the fish) isn't visible. It was a little frustrating trying to get the fly where I wanted it, but several times I knew the distance was good and just stripped as if I knew where the fly was. Fish often found the fly in spite of my clumsiness, so I guess it was all good. With the front blowing out fishing opportunities for the next few days, it was nice to catch a window and put a bend in the rods before things got ugly.