Comparative Analysis of All-Sky Luminous Efficacy Models Based on Calculated and Measured Solar Radiation Data of Four Worldwide Cities

Table 2

Measured irradiance and illuminance data of selected cities.

Station, country	Latitude	Longitude	Elev (m)	Time zone	Source	Illum. data	Year
Lyon, France	45°47N	4°55 E	170	GMT+1	IDMP	Global/diffuse	1994 (8760 points)
Golden, CO, USA	39°74N	105°18W	1829	GMT-7	NREL	Global	2006-07 (17520 points)
Fukuoka, Japan	33°35N	130°27E	12	GMT+9	IDMP	Global/diffuse	1994 (552 points)
Manchester, UK	53°28N	2°14W	38	GMT+0	IDMP	Global/diffuse	1993 (864 points)