Manufactures like Ridge Monkey, Fox and Petzl produce brilliant head torches amongst their ranges of fishing lighting. Other popular products include night fishing bivvy lights, which illuminate shelters.
It's important to see when fishing in the dark. You cannot afford to make mistakes when targeting predators with sharp teeth. In addition, treble hooks are sharp and very dangerous, so you need adequate lighting when extracting these for the fish's sake and your own.
Anglers who love pike fishing are often up early in the winter, setting their predator tackle up in the dark. Adequate lighting makes this task much easier and ensures sessions are free of any potentially nasty accidents.