hi guys. need some help lighting a neighborhood entrance sign. the thought is to wash a 3'x12' stone slab (burnt orange and gray - not uniform in color) in light and mount the letters on standoffs so that you will see the silhouette against the lit background. it seems that the lights would have to be mounted almost at the very surface of the slab to keep from lighting up the front of the letters, but not sure... which fixtures may work for this? your suggestions would be very much appreciated.