Excellent fish-attracting effect! Highly visible!! LED fishing light This underwater light is much more noticeable than a chemical light! It flashes about 100 times per minute. The case is crystal-clear, making it highly appealing underwater. It's a small, lightweight 6cm LED fishing light. This listing is for a set of 3 blue lights. Energy-saving with button batteries! Great value! (Uses 3 LR41 batteries.) Of course, the batteries are replaceable. Two sets of batteries are included in the image! LR41 button batteries can also be purchased at home centers.