Table 1.

Summary statistics of ICE lighting diffuseness measurements. Notes: The ICE values describe the data shown in Figure 3 except for “Schofield et al. (2011), revised,” which describes data shown in Appendix B, Figure B1.

	Mean ICE	Standard deviation	Standard error of mean
Indoor	0.4132	0.1498	0.0122
Rural sunny	0.6514	0.1909	0.0208
Rural cloudy	0.6197	0.0984	0.0100
Urban shade	0.4478	0.0790	0.0109
Urban sunny	0.6598	0.0752	0.0079
Urban cloudy	0.5071	0.0659	0.0068
Time of day	0.4424	0.0830	0.0115
Bloj et al. (2004), expts 1, 2	0.4526	0.1922	0.0533
Bloj et al. (2004), expt 3	0.3828	0.1580	0.0304
Schofield et al. (2011)	0.5281	0.2314	0.0546
Schofield et al. (2011), revised	0.3481	0.1989	0.0469
Boyaci et al. (2003)	0.0942	0.0369	0.0165
Boyaci et al. (2004)	0.6139	0.4886	0.1847
Boyaci et al. (2006), expt 1	0.0581	0.0302	0.0135
Boyaci et al. (2006), expt 2	0.0632	0.0034	0.0019