The addition of transparent horizontal skylight at the north wall begins to balance the brightness at the south by washing the vertical surfaces to the north. The ceiling and vertical surfaces at the north end of the office remain somewhat dark in contrast despite the very high surface reflectance values and low office partition heights. 20% of the interior of the office falls below the ambient illumination criteria of 300 lux. There is a noticeable increase in illuminance levels at the back wall due to the concentrated skylight through the transparent apertures.

A large central transparent skylight comprising 4% of the total floor area provides high levels of daylight illumination at the center of the open office areas. The ceiling and vertical surfaces at the north end of the office remain somewhat dark in contrast despite relatively high daylight illumination levels and high surface reflectance values and low office partition heights. 4% of the interior of the office falls below the ambient illumination criteria of 300 lux. A patch of direct sunlight is visible in the open office area rendering the local workstation uncomfortable from disability glare.

Four transparent skylights comprising 4% of the total floor area provides high levels of daylight illumination at the center of the open office area with a more uniform distribution of daylight. The ceiling and vertical surfaces at the north end of the office remain somewhat dark in contrast despite relatively high daylight illumination levels and high surface reflectance values and low office partition heights. Patches of direct sunlight are visible in plan tracking through the open office area. Both the conference table and the near workstation are exposed to direct sunlight resulting in extremely high contrast and visual discomfort. 100% of the interior office area meets the ambient illumination criteria of 300 lux.

Nine transparent skylights comprising 4% of the total floor area provide high levels of daylight illumination at the center of the open office area with an even more uniform distribution of daylight. The ceiling and vertical surfaces at the north end of the office remain somewhat dark in contrast despite relatively high daylight illumination levels and high surface reflectance values and low office partition heights. Numerous patches of direct sunlight are visible tracking across surfaces in the open office area creating the potential for visual discomfort. 100% of the interior office area meets the ambient illumination criteria of 300 lux.

In the absence of any vertical glazing, nine transparent skylights and three transparent wall washing skylights at the north wall comprising a total of 4% of the floor area provide high levels of daylight illumination and very high uniformity across the open office area. Surface brightness at the ceiling and vertical surfaces at the north end of the office is increased through the use of the transparent wall washing skylights that increase vertical surface brightness. Patches of direct sunlight are visible tracking across surfaces in the open office area causing a veiling reflection on the monitor of the near workstation. 100% of the interior office area meets the ambient illumination criteria of 300 lux.

Twelve transparent skylights comprising a total of 4% of the floor area provide high levels of daylight illumination across the open office area. Daylight from sidelights and skylights are optimized to balance luminance across the section depth. However, continuously moving patches of direct sunlight track through the office creating the potential of extreme visual discomfort at selected work stations. 100% of the interior office area meets the ambient illumination criteria of 300 lux.