Comfort Considerations in Net ZEBs: Theory and Design - Modeling, Design, and Optimization of Net-Zero Energy Buildings - page 136

(3.23)
Fig. 3.6 Daylight glare analysis for a shared office space: False color image
of high dynamic range (HDR) photograph (right) and glare analysis
performed with Evalglare software, where the colored regions indicate
sources of daylight glare (left). (Photo courtesy of Brent Huchuk)
The position index ( ) located above the line of vision is expressed as
(3.24)
while located below the line of vision is expressed as
(3.25)
(3.26)
(3.27)
where is the vertical eye illuminance (lux), is the source luminance
(cd/m 2 ), is the solid angle of the source (°), is the position index, is
the angle from the vertical of plane containing source and line of sight (°),