Riding home couple of nights ago I encounted a fellow commuter coming toward me. Nice bright headlight but as we passed I noticed no tail light. He was on the MUP & I was onthe road. The MUP only runs the lenght of the street we were on & then just dumps you on to a street at each end (which is why I stay on the road).
Anyway the point of this is I can't remember if there is a term for headlight only riders. Cyclopes seems the obvious, inc the inbedded pun.