According to the lovely chap from Igaro they can both be wired straight in at the the dynamo hub, although that might just be for Supernova's. It worked for me for a while but I ended up having problems with my charging unit because it was one of the earlier ones without a stability bank.
sorry for the noob question, what do you need in order to wire lights and igaro simultaneously?
I've got an igaro d1 but I think it's time for some lights...