That's a tough question. Over the years, I've run the full gamut from ultra light to wire line testing 100 pounds. There's a perception out there that light line attracts more strikes. To some point, this is true. But to say that light line by itself attracts more strikes is a misconception.
Light line allows a bait to act more naturally.
A heavier, stiffer line actually dampens action. Light line though, isn't good for every application. In this application, you have several things working for you. First, it will only take light tension to hold the line in the line release. This is an advantage for getting those light biters hooked up.