Tom your layout is stunning! We put some similar LEDs on the club layout. When I ordered them from an ebay seller (China) I assumed (incorrectly) that the top bulb was green and the bottom bulb was red. WRONG!. Both bulbs changed from green to red. So we doubled up the units with two bulbs facing one way and two bulbs facing the other. All the bulbs light up at the same time either green or red.
So what we have (not prototypical) is from either view the turnout shows 2 bulbs lit...2 green for the straight or 2 red for the divergent. Doesn't matter...everybody likes the tiny lights!
I need to read these ebay listings closer before I hit the Buy-it-Now button!
Mark