jiggin junkie,
if its something you wanna pursure, invest in a floating light. Its just a basic brake light in a foam casing. Great for crappie fishing, all seasons.
Ive saw walleye, big and small swim under those lights at night, you went one step further than i ever have, in hooking 1 under lights.
I have done well in fishing NEAR a night light, but never under one for predator fish.
Keep in mind any light under the water(or ice) works in a cone. Your larger fish will always be at the "egde" of the light cone.