Abstract: The present invention is an interior illumination system utilizing one or more optical fibers that have one or more sections of an outer protective coating removed in pre-determined areas and shapes along the length of the fiber. These fibers may then be arranged in groupings or designs at one or more points within the interior of the structure and secured in place via a transparent sheet that is attached to the wall of the structure. Light is then introduced from at least one end of the fibers by one or more light sources so that the area adjacent to the optical fiber groupings is illuminated. Further, the present invention also allows for the intensity of light to be adjusted by a control based upon the light effects desired and to switch the lights on and off.

Abstract: A multiple-panel roof system has panel edges in a shape of like plows which are interengaged with corresponding channels formed in opposing panel edges. A layer of resiliently compressible foam extends from the outer panel surface adjacent to the plow, down the sloped surface of the panel, and covers the tip of the plow. A sealant bead is placed within the channel on its lower wall. When the opposing edges of adjacent panels are fully interengaged, the portion of compressible foam at the tip of the plow and the portion of the foam on the outer panel surface are each compressed by corresponding locations on the channel to form a pair of watertight seals. In addition, the sealant bead is displaced by the plow as the plow enters the channel, until the sealant bead fills the region between the plow and the channel, thereby forming a third seal.