Simply clip the U-shaped illuminant to quiver tip. Care must be taken to select the right diameter for your rod. IMPORTANT Store in a cool, dry place. Keep sealed until ready for use. To activate the chemical light bend only once. Do not over bend or cut the plastic tube. In the event of spillage or contact with open wound/eyes thoroughly rinse area with clean water. The liquid will not cause damage but may cause temporary discomfort. Do not ingest liquid. The liquid may stain clothing or furnishings. Not recommended for children under 10 years of age, without adult supervision.