Wolo’s replacement strobe bulbs are the exact replacements for all LIGHTNING series models, hidden warning lights that are designed for reliability and high performance that emergency responders demand. The bulbs are encapsulated in silicon for moisture protection and to protect against road vibration. Installation is made easy, simply place bulb into a 1” hole, which is drilled into each headlight or taillight assembly and the bulbs rubber grommet plug will make a water tight seal. Bulbs come with a six (6) inch wire lead and a locking connector plug.