I used to use chemical lights when fishing at night so I could see when I was getting a bite - they work great but last only one night. I started using an inexpensive penlight placed near the tip of the rod. To attach the light, first remove any rubber grips from the light. Put a zip tie through the guide foot and around both the rod and light. This tie keeps the light from moving up or down your rod. A second zip tie placed around the rod and the barrel of the light will keep it from twisting around the rod. This light system doesn't hinder the performance of your rod (casting or fighting), and when you're done, flip the switch off - batteries normally last up to 40 hours.