Twilight 400

The Twilight 400 is one 400-lumen 3D Lighting™ system with three ways to carry it. It ships ready to run on a lightweight waist belt and includes the patent-pending mounting bracket, so the same light moves between your waist, your running vest, and your hydration waist pack in seconds, one light that adapts to how you run and what you carry.

At its core is UltrAspire’s 3D Lighting™ technology: a wide-angle beam that casts a broad, even cone of light across the terrain ahead, enhancing depth perception and terrain definition without the harsh hotspots or tunnel vision of a narrow beam. It delivers four modes, High (400 lumens), Medium (200), Low (100), and Blinking, plus a temperature-regulated Turbo Mode that pushes up to 600 lumens for short bursts when you need maximum visibility. Integrated thermal management automatically balances output to keep the system running at safe temperatures during extended efforts. A large, glove-friendly side button with an integrated battery indicator lets you cycle modes and monitor power on the move.

Built with anodized aluminum construction, the Twilight 400 features Perfect Angle beam adjustability, USB-C charging, and a removable, rechargeable 14500 battery that delivers roughly 4 hours of runtime on High.

Three ways to carry it:

• On the waist belt. The included ergonomic waist belt uses a limited-stretch elastic system for a stable, low-profile fit that stays put through your stride, with the updated Fatigue-Free Buckle System for fast on-and-off transitions and secure adjustability across layers and changing conditions. It’s the go-to for daily training, lightweight race efforts, and mandatory race-lighting requirements, meaningful illumination with minimal carry weight.
• On a running vest. Clip the light onto the patent-pending bracket and it integrates directly onto a running vest for a stable, bounce-free setup that holds consistent positioning as you move. Chest-height mounting keeps the beam where you’re looking, and you can access pack storage or secure and undo your harness without ever removing the light.
• On a hydration waist pack. The same bracket mounts to your UltrAspire Lightning, Mountain Racer, and Vertix waist packs, so the light rides right on the hydration system you’re already running with, ideal for long days when you’re carrying fluids and want your lighting integrated into your kit.

Whether you run light and fast on the belt or loaded up on a vest or waist pack for the long one, the Twilight 400 moves with you, one light that goes where your run does.

Includes: UltrAspire 14500 battery, USB Type-C charging cable, patent-pending mounting bracket, and a molded foam carrying case for organized transport of the light, battery, and charging accessories. The mounting bracket system is patent-pending.