Requirements III

-Achieve a value, calculated as the product of the visible light transmittance (VLT) and window-to-floor area ratio (WFR) of daylight zone between 0.150 and 0.180. The window area included in the calculation must be at least 30 inches above the floor. 0.150 < VLT x WFR < 0.180

-The ceiling must not obstruct a line in section that joins the window-head to a line on the floor that is parallel to the plane of the window or that is twice the height of the window-head above the floor in, distance from the plane of the glass as measured perpendicular to the plane of the glass.

-Offer sunlight redirection and/or glare control devices to ensure daylight effectiveness.

-The daylight zone under a skylight is the outline of the opening beneath the skylight, plus in each direction the lesser of:

-70 percent of the ceiling height,