i use to 21inc green lights one in front one in back and to black lights one in front one in back drop lights 6inchs under water i do not stay in one spot i move around very slow the bait fish will tag alone with the green lights set like this it will give plenty of light to see your poles the black light will show your lines in case a crappie goes side ways i fish taylorsville to its close for me have caught nise crappie there.