Abstract: The present invention provides a window frame design that is adapted to receive at least two light-panels. The window frame comprises a stepped frame section that includes a lower step surface and an upper step surface. The lower step surface is adapted to receive a first light-panel so that a section of the first light-panel lies flush against the lower step surface. Similarly, the upper step surface is adapted to receive a second light-panel so that the second light-panel lies flush against the upper step surface. The window frame design of the invention can be either incorporated into a skylight frame that may be attached to a curb unit on a roof or it may be an integral part of a skylight frame-curb assembly that also contains a curb section. In another embodiment of the invention, a window frame design which directly incorporates one or more light-panels during molding is provided.