Energy and Daylighting Evaluation of Integrated Semitransparent Photovoltaic Windows with Internal Light Shelves in Open-Office Buildings

Table 6

The performance indicators of visual comfort used in this study.

Criteria	Performance indicator of delighting quantity and quality
UDI	100 lux < dark area (needs artificial light)
	100 lux–2000 lux (comfortable), at least 50% of the time
	>2000 lux too bright with thermal discomfort
DA	Set up 300 lx
DGP	0.35 < imperceptible glare
	0.35–0.40 perceptible glare
	0.4–0.45 disturbing glare
	>0.45 intolerable glare