I not modeling a scale SD-40, it is a LGB Rio Grande #2056 Diesel, it will be repainted and lettered in my RR name so there is no need to be correct for that particular engine, etc. I just want to use a light that has some interest when running on my indoor layout, or the club outdoor layout, so when its your railroad you can do what you want. Thanks again for the info, I will look into the different lights that Rail Pro offers and see what I like best, thanks.
trainman