[Jersey Jim]

I agree also that red is useless at depth, but oply if you're relying on a source from the surface. Remember, you're bringing your own source of light down with you. There is no reason why 10 or so feet of distance between your light and the fish should be filtered. Now emitted power is another issue. If green lasers emit more intensity, then that would be the reason to go with green. Just my .02

Jim