I actually just finished doing this to my 15 Focus and it turned out so well I was figuring how I could do it to the expedition. For my install, I used a fuse tap to the underhood fuse box at the rear wiper 5amp fuse (all wire encased in split wire loom from harbor freight), that way they are on whenever the vehicle is running. Do you have a picture of how you mounted that bracket? I'm using 16mm black aluminum amber LED pilot lights and they are just the right size and brightness to be noticeable during the night and day.
Here's my focus raptor lights at night:
