For spelunking, nocturnal ascents, poorly lit hiking, and twilight backcountry trips, strap on the burliest and brightest constellation of LEDs in Princeton Tec's outdoor line, the Apex Rechargeable Headlamp. Heck, you could cook ants or help land a plane with these 275 lumens of power. Extending up to 116 meters, the four Ultrabright LEDs and a Maxbright LED can pierce even the thickest darkness for hours on end. Using fully charged batteries, the Apex will burn up to 90 hours. When the light gives out, don't waste your money on new batteries, just recharge them and continue on your way.