L3 Illumination L11C 3 Mode Nichia 219B LED Pocket Flashlight (Black) Nichia NVSL219BT-SW45/D220 4500K, 92 CRI Three modes of output: Low (3 lumens, 30hrs ) -&gt; Medium (30 lumens) --&gt; High (140 lumens, 1.5hrs) -&gt; (Tested with Ni-mh battery with actual capacity 2500mAh) Uses one 1.5V AA battery (ni-mh, alkaline ). 14500 batteries are not recommeded, because they heat up quickly. 20-gram weight (excluding batteries) Made of durable aircraft-grade aluminum