Lights

Does anyone know a way to quick release dynamo lights? I've seen the QR bolts but the wire is the problem since it is fixed to the light.

I'll soon have 2 bikes with dynamo hubs and would rather not have to rewire all the time. I have a good light I'd like to use it on both bikes instead of forking out for a second one. It would also help to prevent theft.

I guess a normal spade connector could work but those are usually shrink wrapped to keep out rain - not sure if it would be good to expose the electrical connection to the elements?

Shimano & Sturmey Archer use a plastic block slip on connector which is more or less waterproof. I've never had a problem with either in heavy rain. It just slips on and off very easily and it's made for repeated disconnect/connections, I wouldn't worry about it. SON hubs use spade connectors.
http://sheldonbrown.com/images/nexus-wiring.jpg