With its 45 lux, the rechargeable AURA 45 USB shines more than 55 meters, making it ideal for safety-conscious everyday bikers who use bikes in their leisure activities as well. The new integrated brightness sensor automatically regulates the light intensity, allowing an optimum relationship between luminosity and burn time.In addition to the Standard mode with its 45 lux and 6.5 hours of burn time, and the Eco mode with its 15 lux and a full 21 hours of burn time, the AURA 45 USB has an Auto mode.