What Ben said! Why in the world would you use light line. The line doesn't make a spinnerbait go deeper or shallower. It doesn't affect the wiggle. A spinnerbait doesn't lay still on bottom so a fish can examine the line. You deserve to lose them!
Do you lite line a buzzbait too? Why not use 6lb on a frog? You don't need Flouracarbon, 20 lb mono in clear water works fine.