Well I got some tips. I commonly night troll for big walleyes. It does have its pros and cons. I find that the best time to night troll is either late in summer when the water and water skiers are hot, these two things really shutdown the big eye's. The second time is right after the spawn, because the feedbags comeon then. As for lights I use the backpacker waterproof lights. I screw them on and you can see the red lights from a long ways away. Sometimes water gets in and you have to dry out the lights with your shirt. The lights cost about $5 and take 2 watch batteries (batteries last several nights). The batteries do make it a little expensive, I troll all night long, but well worth it-because they are very visible. I have had boards with reflective tape com-off in 1-2 foot waves and by the time you turn around you will never find them with the spotlight, in calm water you are okay. Most of my big fish(8-11lbs) are caught at 11pm to 1am.
When you get a big eye' on that light and board should be 4 feet off the water and the drag giving line-then you know its a big one!
For big fish use a big lure. I hear people say the original rapalas are best for night, but I do much better with jointed lures and bright colors.
Good Luck Fish'n!