Thanks for the replies.
I do value and respect the need for accurate modelling but my point on this occasion is that the interior lights are SOOO dim that even in a completely darkened room you really cannot tell they are lit. I agree we don't want lighthouses or Christmas lights, but there is a compromise to be had between "bright" and "dim" so you can tell something is there surely.
Also, if I take this argument to its extreme, the front lights ARE like laser beams and the route display panel is so "blue LED bright" they would never have looked like that. sigh.... I need a darkened room now, model put back in the cupboard