Busch & Muller Lumotec Cyo T Premium Senso Plus
This is a very powerful LED front light for dynamo system. Light output is 80 lux, and it casts a wide beam.
The T" means it has daytime running lights. "Senso" means it switches between day and night mode automatically. "Plus" means it has a standlight which stays on when you're stopped. "Premium means it has a brighter, wider beam.