[PeterVerney]

Actually a low, slow target is a difficult target for a night fighter, whether radar assisted or not. Day fighter pilots with little or no night flying experience would be as much of a danger to themselves as to their opponents.
I well remember hearing a survivor of the Swordfish attack on the Scharnhorst and Gneisnau vivdly describing how Fw 190s had great difficulty hitting them and when they did many shells went straight through the canvas covered wings without exploding