I got the front light but stuck with the Ever Ready rear light. The big advantage of the front light was that I could place it on my handlebars (the Never Ready being on a boss half-way up the right hand fork blade) and angle/aim it whilst on the move. This meant that, whilst cycling the long straight country lanes of the Fens, I could point it up and hope to catch the eye of the car half a mile away but still blinding me with its main beam lights, so that the driver would go to dip, or - more often the case, point it to the verge just in front of me so that I could steer by the verge rather than look ahead blinded by the car's headlights and hoping that I was staying on my side of the road.
For a few years, I had a rear dynamo torpedo/egg shaped light fixed between my Karrimor rear rack (they had a washer welded on to fix the light to) and the mudguard, powered (after suitable bulb substitution) via wires (in parallel) and crocodile clips to the front Ever Ready light. It worked well and meant that I could use panniers and the top of the rack but battery life was woefully short: I recall once setting off at night to get across the country from east coast to Wolverhampton but stopping just short of Grantham, on account of having no lights, and sleeping off the roadside.