When night-biting walleyes, crappies, and northern pike trip your tip-ups in pitch-black conditions, spotting a raised flag across a frozen lake can be a real challenge. The HT Illuminator Lighted Tip-Up Flag Assembly converts standard hardwater tip-ups into high-visibility, light-up strike detection systems. Engineered with an ultra-bright LED mechanism, this replacement flag assembly instantly illuminates the second a fish pulls line, giving you an unmissable visual signal whether you are watching from a heated fish house or scouting from a snowmobile.