water could have blown some wires off the rose,you need to check it,you may have loop in,loop out wiring to your lights,that is to say live and neutral comes from fuse box,to each rose,then from there to next one,then back to fuse box,you you lose one of these feeds,then you not get ;power to next rose,i would advise you to get an electrician in,its a very simple fix for us,not for user
mm, March 2012