Avalon tail lights

Can't specifically answer your question but I have seen European versions of the same cars imported to America have different lights, front and back. I suspect it has something to do with regulations in each country regarding safety.

BINGO.

Johnny, show the contestant the prize that awaits him. You win a 4 night, 3 day cruise of Boston Harbor, a case of brocolli, and 50 gallons of non-fat milk.

This is exactly right. The shape, location, and color of lights are dictated by the markets that the car is designated for in the First Sale. A car bound for North America has different lights than the same car bound for Australia.