At 400 lumens with 10 hours of burn time, the high intensity LED and incredible battery life of the SL4 eLED (L1) will give you the light you need at work or at play. With its compact size and narrow penetrating beam, this secondary dive light tops the charts for international dive travel or can be used in a variety of industrial, fire or utility applications that require a lot of light, along with complete waterproof reliability. Ultra Violet option! See the reef like never before!