i sell and have uv (blacklights) on my boat, the type that go in the rub rail. i have not noticed any diffrence in the fishing. i dont see how it could affect the fish any diffrent that having your nav lights on. which is the law after dark. maybe if you were fishing right up on the fish drop shotting, but most cast several feet from the boat. if looking for a good blacklight, one of the post above is correct, you do NOT want any uv light that is over 405. you also do not want a 5050 led. by having your nav and blacklight in the rub rail, you never have to waste time by putting up the lights when moving and such. they are also cheaper than buying the moonlight and sloan blacklights. those run over 100 each and you only get 3 led lights. you can get a 48 led strip for $20. so for 120 bucks you can get the front,back,and middle of your rub rail on both sides. thus having 48x6 leds. wire it to a toggle switch at the bow and your in buisness. you can use red/green/white in the rub rail and wire to your nav light switch. the new type of lights are just cheaper, more durable, and less hasle by having them in the rail. hope this helps.