FXLuminaire® FC3LEDRGFB Designer Premium Series 4.6" x 4" Black 3LED FC In-Grade Light. The FC is an ideal fit for any LED application, featuring an innovative installation sleeve that allows for easy removal and adjustment, especially in concrete. The FC also features four faceplate options and is up to 9LED capable. The new ground wash faceplate for the FC is field-adjustable and offers a no-glare design that complements deck and patio applications.