The Bontrager Flare RT2 Rear Light\\\'s 90 lumens output, can be seen from upto 2km away out on the road. The compact design, is entirely waterproof with its USB seals to prevent water getting in. It features an integrated light sensor, where the light will auto adjust to the brightness surrounding you. Altogether, it has 5 modes which can all be controlled, monitored and connected to your Garmin and Bontrager ANT+ devices. A great compact light to have so your safe on the road, commuting or just out for fun. Key FeaturesSpecifically designed focus, flash and range for ultimate daytime visibility The interruptive flash pattern produces up to 90 lumens for ultimate daytime visibility The integrated light sensor auto-adjusts brightness to your environment Connect with Garmin® and Bontrager ANT+ devices for always on, battery status and control Flash modes: 90LM-6hrs, 45LM-12hrs, 5LM-15hrs. Steady modes: 25LM-4.5hrs, 5LM-13.5hrs Confidently ride through wet conditions with an updated USB port and IPX7 waterproof rating Bike Lights Buying Guide