This is the front view. The Supernova E3 has a standlight feature.
The connection at the Schmidt SON 20R hub.
I have a racing bike that I use for brevets. Here it is equipped with Planet Bike Speed EZ fenders. Notice that I have added an extra connection between the hub and light.
This is the extra connection between the hub and light. It allows easy removal of the light.
Top view. I mounted the Supernova E3 on the SideTrak Excess Access handlebar mount. I plan to have a second light as backup on the left.