The Amp 3.0 defies size perceptions with 40 lumens of pure white light in a compact & rugged Xylex housing. The impressive brightness is courtesy of the latest Nichia Ultrabright LEDs boasting 30% greater output than standard LEDs. Combine this with two output settings and a regulated circuit, and you have 90 hours of glorious illumination. Burn time: 61-90 hrs (high-low). Illuminates up to 33 m away. Dimensions: 1.375" x 5.5".