The Lumenok® Tip-Up Light is a rugged, bite-activated light designed to help ice anglers spot strikes instantly. Proudly Made in the USA , this ultra-bright light fits most tip-ups and delivers up to 40 hours of runtime on a single battery. Built for harsh ice conditions, the Lumenok Tip-Up Light attaches securely to tip-up flag wires up to .105” diameter and activates automatically when the flag trips—so you never miss a bite. Key Features Available in single and 3 pack Bite-activated illumination Extremely bright LED for maximum visibility Up to 40-hour battery life Fits most tip-ups (.105” max flag wire diameter) Durable, ice-ready construction Mercury Free Made in the USA Activation & Installation The battery ships stored in the protective cap opposite the thumbscrew. To activate, remove the cap, reverse the battery, and insert it pin-end first into the light module. Once the light illuminates, replace the cap. To install, loosen the thumbscrew and insert the tip-up flag wire between the washer and clamp. Position the light module as shown in the product images, then tighten the thumbscrew to secure. Deactivation for Storage Remove the cap, remove the battery, reinsert it backwards , and replace the cap. Simple. Reliable. Built for the ice. When a fish hits, the Lumenok® Tip-Up Light makes sure you see it.