I use a Bluewater LED that mounted to my trolling motor. It does a good job, but the handheld spot light was a little better because you can sweep the area in front of you. With the bow mounted spot lights you only see the area directly in front of you, takes a little getting used to.
I use a steering column trim switch for the light, it is an intermittent on switch and allows me to use it without taking my hands off of the steering wheel.