Night Lights are easy to use and are designed to be used in conjunction with the Drennan Insert Crystal waggler range. Just bend the tube in several places and shake to even out the luminous chemicals inside, then insert into the float or attach with the piece of silicone tubing provided. All thats needed is to bend the tube until the internal glass breaks then shake well to mix the chemicals inside. Place into the plug on the float or attach with the piece of silicone tubing provided. These are also used by many serious river anglers when fishing at dusk and into the night to attach to the rod top or quiver tip.