Check the listing for details. LELAND Emergency Strobe Light (ESL II) & Flashlight Scuba Diving. Condition: New other (see details), Made in China. Listed at 5.00 USD. Dual Functionality: The ESL II is designed to function as both a strobe and a flashlight. It combines a strobe light for rescue signaling with a, included, flashlight function. Visibility: Features a high-intensity Xenon flash strobe visible up to 6 miles depending on conditions.