Quoted from DaMoib:Gottlieb also shows a green "plastic light shade" in addition to the red and yellow in their parts catalog, in *four* different lengths (were they used for more than arch lighting?). PBR adds blue and amber, for a grand total of 5 colors!
A random sampling from IPDB only showed the red/yellow combination. I'll also claim that red in the middle dominated, but I might be biased...
These colored plastic sleeves were used for several purposes. '70s games used them over the lamps for the illuminated coin chute.
I've only come across red, yellow, and amber on EM games. Blue and green may be for more modern SS games, like "Xenon", and "Hulk" perhaps.
