No because the lightpads themselves are clustered, full-featured Linux machines in the form factor of a switch, they serve that purpose [of a server] within the home so you won't need a server internally at all.
But if you needed any access to the lights from outside the home, you would. In which case you can either colocate one or prop one up on AWS to serve as the remote command bus. Plum provides that right now but I want to, at some point, enable folks to do it themselves.
Or if you really want to, run the server in-house and port forward. That could work too.