The Spanninga Pixeo LED taillight mounts on a rear fender. The Pixeos are visible over 180 degrees horizontal, and are very bright directly on axis, due to focusing prisms in front of the super bright LED. These taillights do not blink.
The Pixeo XS is powered by any 6 volt bicycle dynamo, such as the Schmidt SON. It has a standlight which keeps the light on for a few minutes after you stop.
The Pixeo XB has a simple two position On/Off switch and will be delivered with two AAA-batteries.