I think I've maxed out the # of lights I can add to my scoot, so here are some pics. Most of the them came from superbrightleds.com.
My cheap top case had a lens across the back but no lights. I added 3 strips of leds, the center one wired as a running light.
And the top and bottom strips wired to the brake lights.
Then I added two more strips on the top lid wired to the turn signals. You can see the unlit strip in the top pic. They're black and blend into the case well. Being flexible, they wrap around the sides so they're visible from the back or sides.