Chemical lights are very popular in fishing, making night fishing easier. Designed to be placed on floats, attached to polished fishing rod tips or to make spinning baits such as twisters or wobblers more attractive. YORK SY452U lights create a bright, clearly visible light. In these, a powder placed in a special tube was used to initiate the reaction that causes fireflies to glow, and not a liquid, as in the case of classic chemical lights. The principle of operation is the same, the reaction starts when the tube is broken.