Today I installed two blue led lamps (4 bulbs per lamp, minimum, for brightness) in the passenger footwells instead of the standard white ones... (type 501's from e*ay)
They looked quite nice, but it needed something to set them off against the black carpets.
As my car had the proper ford c-max mats fitted already, I popped into @alfords and purchased some chrome ("u"type) strip, used for edging motorcycle fairing screens.
The mats are pre-cut at an angle as they fit under the footwell. I cut approx 10 inches of chrome strip and forced the strip over the edge of the carpet (it contains adhesive in the "u")
I could have covered the whole of the carpet edge with chrome but it looked too much.
I xtra glued the strip at various points for good adhesion.
After placing the mats back in the car, when the Blue led's light up, they now reflect off the chrome strip giving a stunning effect in the footwells. You can of course pick Any colour led's to suit your taste.
When it stops bloody raining i'll post a few pics.
Hope this may be off help to someone.