electroluminescent number plate
Not sure what that is, but i'll ask the question or read the books in the morning.
They are the same thing as the illuminated numbers on the cars @ Le Mans. Basically made from a material that when you put a voltage across it it emits light. Effectively it is a backlit number plate where the backlight is built into the plate itself.
It is this last point that makes them a grey area according to the regulations as the regs call for the mounting area to be illuminated, not the plate itself. Playing with words it might be, but the strict interpretation of the regs means that you still have to have standard license plate lamps. We were looking into using this technology when designing the Bentley Conti GT, but couldn't get the bean counters to accept it when we were already having to fit normal lamps. In fact the VW group has been looking to use these for sometime, but still no go with the regs...they do look good though
, and would be a definite improvement over normal lamps