Abstract: A skylight structure that is sealed at the room ceiling rather than at the roof membrane is provided. The structure includes a sealed light-diffusing panel attached to the ceiling, a light tube to channel light from the roof membrane to the light-diffusing panel, and a curbless roof membrane structure. The light tube is constructed on-site using lengths of light-reflective material and special fastening means that provide great versatility in negotiating obstructions encountered in the space between the roof and ceiling.

Abstract: A skylight structure that is sealed at the room ceiling rather than at the roof membrane is provided by a fixture framework that contains light-diffusing panels sealed to the frame. The internal structure of the entire framework is sealed. The framework is hinged so that it may be opened for cleaning and replacing burned-out bulbs that may be mounted around the periphery of the ceiling hole. A light-transmitting tube of flexible material channels daylight from the translucent roof membrane to the hole in the ceiling. The fixture framework is fastened to the support joists of the ceiling and covers the hole in the ceiling.