An overhead industrial light fixture of the type including a housing, power-related components and a lamp-mounting socket. The housing has top and bottom walls and sidewalls together forming a substantially enclosed space, and the bottom wall defines a socket window. The power-related components and the socket are both secured to the housing and within the enclosed space, thereby to provide a low-profile fixture with its components within a single housing. Preferred embodiment include the socket having its lamp-receiving end substantially aligned with the socket window.