Need ideas/input for a front yard lit street address display

I was looking to remove some of our lawn in the front yard and put in some ornamental grasses, shrubs, and a rock with our street address on it. I've seen some with lights built in so you can see it at night. Does anyone have any creative ideas for mounting the numbers and the light setup? I'd like to go solar power and blend in the panels with some mexican feather grass. I originally thought, just build a box out of wood but the wife wants limestone or other light colored rock.