Busch & Muller Lumotec Eyc T Senso Plus
This is a small but powerful front dynamo light, as found on the 2014 Vivente World Randonneur. Light output is 50 lux. The weight without the mount is only 70g!
The "T" version indicates that it has a daytime running light, and the "Senso" that it will automatically sense the conditions to switch between day and night modes. The "Plus" means it has a standlight, so the light is still on when you're stopped at traffic lights.
Please note you need a dynamo system installed on your bike to use this light.