FXLuminaire TC20CU 3.5" Copper Trave Casa 20W. On any architectural mounted light source, one of the primary challenges is not to detract from the fine woodwork craftsmanship. The FX TC is designed to seamlessly incorporate into fine outdoor architectural structures. The TC slips into tight spaces and features integral wiring and lamp mount for clean installation. The TC uses the same lamp as the CL, TS, and VL, allowing a mix of fixture types to suit mounting needs, while maintaining consistent light quality.