Table 5. Light source testing

Reported Radiance1) (W/m2/sr/µm, 400-800 nm)	Calculated Luminance2) (cd/m2)	Reported Luminance1) (cd/m2)	Calculated EV3)	Gossen Light Meter EV4)	Lightme App EV4)
0.000	0.00	0.00	N/A	< –5.00	N/A
0.049	3.45	3.48	4.80	4.50	4.33
0.061	4.29	4.26	5.09	4.75	4.67
0.086	6.02	6.07	5.60	5.33	5.17
0.108	7.56	7.63	5.93	5.67	5.50
0.142	9.96	10.05	6.33	6.00	5.75
0.165	11.55	11.69	6.55	6.33	6.00
0.188	13.16	13.30	6.73	6.50	6.25
0.235	16.45	16.59	7.05	6.75	6.50
0.292	20.46	20.64	7.37	7.00	6.75
0.349	24.40	24.60	7.62	7.33	7.00
0.407	28.49	28.70	7.84	7.67	7.17
0.521	36.45	36.75	8.20	7.83	7.67
0.579	40.51	40.80	8.35	8.17	7.83
1.155	80.85	81.10	9.34	9.00	8.75
2.309	161.6	161.7	10.34	10.17	9.75
4.617	323.2	322.9	11.33	11.17	11.00
9.265	648.6	645.5	12.33	12.17	12.25
18.640	1,305	1,292	13.33	13.00	13.25
28.080	1,966	1,937	13.92	13.67	13.83
32.838	2,299	2,260	14.14	13.83	14.17

From the RS-7-6 control software; radiance was reported in µW/cm²/sr, and multiplied by 40 to convert to W/m²/sr/µm over the ~0.4µm range used in this test.
Using the reported radiance and the conversion factor of 70 from Section 2.4.
Using measured luminance and EV conversion formula from Section 1.4.
Recorded at the nearest 1/6 or 1/4 EV.
EV, exposure value.