There is described a blind for installation between an inner environment and an outer environment where light originates. The blind comprises slats substantially forming a vertically periodic arrangement. Each one of the slats extends in a substantially horizontal axis, and comprises an upper surface and a lower surface. The upper surface has a normal oriented both upwardly and toward the outer environment, and comprises a coating providing specular reflection. The lower surface has reflection normal oriented both downwardly and toward any one of the outer environment and the inner environment, and comprises a coating providing specular reflection. The upper surface and the lower surface of a given slat are joined at an apex pointing toward the outer environment.

Wheel carriage assemblies and related fabric deployment systems and methods are disclosed. A wheel carriage assembly comprising at least one wheel with ball bearings on the interior of each wheel, and a pivot point that allows for position independence, is configured with a hembar coupled to a piece of fabric to allow a surface of varying shape to be covered. The system provides the ability to cover both traditional window shapes as well as surfaces of irregular shape or inclined orientation, and reduces and evens the amount of wear on certain components to extend system life.

A skylight for a building includes a solar panel arranged within the skylight, the solar panel comprising one or more photovoltaic cells to collect direct radiation from rays of sunlight for conversion to electrical power, and an optical element to receive the direct radiation and refract it to the solar panel, and to receive the direct radiation and diffuse radiation scattered from the rays of sunlight and refract the direct radiation and the diffuse radiation through the skylight, bypassing the solar panel, to provide daylighting in the building.

A building envelope system. The building envelope system includes a plurality of shading modules for installing over fenestrations of a structure. Parameters of the shading modules are selected to optimize certain indoor environmental quality parameters. The optimized shading module parameters include: size, shape, geometry, orientation, number, placement, and material. The optimization process further includes consideration of the geographical location of the structure and a compass facing direction of each fenestration. The indoor environmental quality parameters include maximizing spatial daylight autonomy (SDA), minimizing annual sun exposure (ASE), and minimizing daylight glare probability.