Lenses for steam locomotive headlights

[nachoman]

This question is mostly for DoctorWayne -

What do you use for headlight lenses, considering you don't actually put bulbs in yours?  

I agree with your reasoning - 1) my era did not use headlights during the day 2) I don't have any interest in modeling "night operations" in an era/location when electricity was in its infancy.  

So what to do with my headlights?  The little jewel that comes with the MDC locos looks quite brilliant, but doesn't look quite right to me.  

Thanks,
Kevin