A lamp and socket assembly includes a lamp assembly including a lamp holder having an end panel, and a housing having a lamp side and a wire side. The lamp side includes a lamp receptacle. The lamp holder is received in the lamp receptacle. A channel is formed in the lamp receptacle. The channel includes opposed side walls, and each side wall has an engagement surface. The engagement surfaces engage side edges of the end panel to retain the lamp assembly in the lamp receptacle. A method for sealing the wiring cavity in a lamp socket includes fabricating the lamp socket with a passageway between the wiring cavity and the lamp side of the socket housing, positioning the socket housing on a non-adhering surface with the lamp side facing upward such that the wiring cavity is blocked by the non-adhering surface, introducing a potting compound into the wiring cavity from the lamp side of the socket housing through the passageway, and removing the socket housing from the non-adhering surface after the potting compound has hardened.