A light fixture including a housing formed by a pan having parallel side walls terminating in mounting phalanges formed with O-ring rungs and further including retainer rails which engage the opposite side of a flexible lens to hold the lens against an O-ring in the O-ring runs to maintain a moisture resistant seal. These N interface devices are useful for connecting an N-port device under test to the VNA. The circuit module is automatically arranged based on the virtual arrangement net list; and the virtual arrangement cell contained in the automatically arranged circuit module is replaced with the circuit cell contained in the net list. Wiring layers are disposed on the surface of interlayer insulating layers. A tensioning assembly is positioned in the header and, without disassembling the protector, it may be accessed to adjust the tension of the spring. According to exemplary embodiments, the transmitted Emergency Locator Signal communicates with the local communications network to identify a location of the calling party’s communications device at a geographic location of an Emergency Communications Address.