Fenix tk35 2015 multi functional flashlight 960 lumens output tk35 is a high intensity multi functional flashlight utilizing cree xm l2 u2 led it delivers a max 960 lumen output and a max 355m long throwing beam with two 18650 batteries or four cr123a batteries offering 5 brightness levels strobe and sos function dual tail switch tk35 excels in various outdoor activities such as exploring camping searching caving and more features utilizes cree xm l2 u2 led with a lifespan of 5