Pelican 2350 LED Light - 2350 IT'S NOT SMALL, IT'S CONCENTRATED. Get a grip on LED performance. Pelican's new 2350 LED Flashlight emits up to 100 lumens of concentrated light. Powered by one AA alkaline battery, it's one of the brightest flashlights in its class. At only 4.23", you'll always want the Pelican™ 2350 LED Flashlight in your pocket. Mounting Options Available: ACE or BJ005 ($25 each) BJ005 - Allows for easy removal and reattachment of light to helmet with gloves on. Designed to accommodate small 2AA lights up to lithium battery lights (.8-1”.02”, 22.9mm-25.9mm) from Pelican, Streamlight, Surefire, UK and others. Perfect for RECHARGEABLES! ACE - Fits Lithium powered, Tactical style lights from Pelican, Streamlight, Surefire and others. 1. Place light into BlackJack, leaving set screws loose 2. On helmets with visors installed, place visor in “Down” position 3. Place light lens adssembnly directly behind visor, (or in desired position if no visor) below brim. 4. Snug up all set screws, BE CAREFUL not to OVER TIGHTEN screws. Screws should be tight but not damaging helmet shell material.