Rear light there is a screw on the inner edge of the light you will need the boot open to see, then the lights are just pushed into a rubber gromet so once the screw is taken oout they will pull out but put a cloth over the top of the bumper below the light just in case you mark your paint when you pull the light out.
Number plate lights I think there are 2 screws holding each one but they are fiddly to remove. I did mine 2 years ago:whistling:
we got pictures of these LED's? sounds interesting.