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UltrAspire LUMEN 400Z 2.0 Waist Light

The Lumen 400z 2.0 waist light features UltrAspire 3D Lighting which casts shadows across uneven surfaces giving you a better understanding of your terrain. This light produces 400 lumens, can be tilted up and down, and is adjustable between spot and flood lighting giving you plenty of versatility. The large button lets you easily adjust between high, medium, low, and blinking settings and now also includes a battery indicator light that when toggled on quickly illuminates green, gold, or red indicating battery level. The Lumen 400z includes a sweat proof pocket that can hold a large cell phone or any other essentials. This light features our Race Fit which is a fatigue-free buckle system allowing you to easily undo the buckle, and a conical belt which is made of limited-stretch elastic providing a more comfortable and natural breathing pattern. This waist light includes one of our UltrAspire rechargeable 18650 batteries and features a USB Type-C charging port. Includes a USB Type-C charging cable.


  • Burn time: 6-14 hours (white light), 10 hours (red light)
  • IPX7 Waterproof rating
  • Sweat-proof pocket
  • Adjustable zoom spot or flood modes
  • Breathable mesh
  • Low Weight™: Lightweight components and materials create an almost unnoticeable on-the-body feel without compromising durability
  • Steady Beam™: Prevents eye fatigue by maintaining a steady lumen output that does not dim until the battery is very low
  • Stable Ride™: Proportional weight distribution combined with our conical belt shape create balanced load and a no-bounce ride
  • Fatigue Free™: Easy operation for fatigued minds in extreme circumstances
  • AutoCool™: Heat dispersing fins mounted in and around the light passively dissipate heat
  • Widebeam™: Like daylight. Even lighting eliminates headaches and tunnel vision
  • Enduralight™: Sturdy construction and aircraft grade aluminum provide better durability and improved hot and cold tolerance while reducing overall weight
  • PerfectAngle™: Easily adjust up, straight, or down to suit your terrain


  • Weight: 5.1oz (144g)
  • Color: Black/Red
  • Size: 26"-38", adjustable
  • Volume: 1L