The Vena XDS dynamo light is a small, sleek, and aggressively capable rearlight. It's built in stand light and motion sensors put your safety first. The stand lights keeps the light running even while stopped. This light also features RBT.
Spanninga developed Reverse Beam Technology (RBT) to promote better energy usage and light output. By reversing the direction of the bulb in the light casing and reflecting it off of conical mirrors the light uses a quarter of the power without losing any luminescence. The energy usage is reduced without compromising its light output. Just brilliant.