B+M Cyo
 

I have a B+M cyo light on my commuter. If i fit a standard LED dynamo tail light,will it operate with a
standlight,as its wired from from the Cyo,
thanks.

You'll need the standlight version of the taillight if you want it to illuminate after you stop pedalling. The standlight for the front Cyo light only keeps the front light illuminated, and does not make the taillight into a standlight as well.

Thanks for clearing that up so quickly,standlight version it is!