The Exposure Revo Dynamo Front Light is an all new concept for Exposure Lights. For the first time Exposure Lights is doing away with batteries and embracing the latest in dynamo developments. New super-efficient dynamo hubs enable the Exposure Revo Dynamo Front Light to be used both on and off road. This compact Exposure light is a powered light and offers an 800 lumen output with the burntime only limited by rider endurance. If you keep pedalling the front light keeps shining bright. With Stand Light Technology on this light, when you stop riding the light dims slightly but remains lit for 10 minutes. The bike light ensures you will still be seen when stopped at junctions and it bounces straight back to full output after a couple of pedal revolutions. There is up to an hour of light that is produced on this bike light after this to help with all post ride activities. Exposure Revo Dynamo Front Light Specifications Weight: 110g Output: 800 lumens Power: Dynamo Hub  Burn time: Ride duration Emitter: 4 Cree XPG R5 LEDs Stand Light Technology: This ensures the Revo won’t leave you in the dark when you stop. It will keep two out of 4 LEDs lit for 10 minutes, ensuring you will still be seen. When you start pedalling again, it’ll quickly pick back up to full power. Smart Port Technology Plus (SPT+): Patented technology that enables the use of rear lights powered from the Revo. Collimated Lens Technology: Exposure Lights use these high-tech resin lenses which have been extensively researched. These lenses are specifically designed to maximise light collection from the LEDs and efficiently produce an optimum beam pattern for cycling ensuring no light is wasted.  Weatherproof Body: CNC machined aerospace grade aluminium body with efficient heat transfer design. Fully manufactured in the UK Gold plated charge port: The charge port is gold plated for corrosion resistance, more efficient conductivity and it is sealed to a greater level adding protection to your light. Storm Cap: The Smart Port is protected by a silicone cover to stop muddy gloves pushing dirt into the port.