It is just a matter of personal preference. There is not much difference when bank fishing and using something like a coleman lantern and the shine of a full moon on the water. Gotta remember though, most of the good size fish come into the bank looking for their supper. They are not used to something crossing the moon and putting a shadow on the water, so don't put your coleman's where they will cast shadows. Also, My belief is that the fish can feel the vibrations of a person walking on the bank. So I bait up, set down, and don't move around. When I get a bite, hook a fish, or take the fish off the line is time to move around, but I feel it generally takes 10 to 15 minutes of inactivity before they will feed in the general area again. So, I think it is movement and ground vibrations you need to eliminate, not necessarily the light.