| Brightness | Country | % Correct |
|---|---|---|
| 0.010 | D. R. Congo | 79%
|
| 0.005 | Chad | 75%
|
| 0.005 | Niger | 74%
|
| 0.006 | Mongolia | 73%
|
| 0.007 | Mali | 72%
|
| 0.001 | Central African Republic | 65%
|
| 0.005 | Mauritania | 65%
|
| 0.002 | South Sudan | 65%
|
| 0.014 | Namibia | 64%
|
| 0.003 | Somalia | 62%
|
| 0.013 | Ethiopia | 59%
|
| 0.019 | Botswana | 55%
|
| 0.005 | Madagascar | 55%
|
| 0.005 | Eritrea | 51%
|
| 0.020 | North Korea | 51%
|
| 0.014 | Kiribati | 44%
|
| 0.003 | Tuvalu | 44%
|
| 0.018 | Guinea | 43%
|
| 0.020 | Papua New Guinea | 43%
|
| 0.007 | Solomon Islands | 39%
|
| 0.008 | Guinea-Bissau | 38%
|
| 0.011 | Liberia | 36%
|
| 0.014 | Sierra Leone | 35%
|
| 0.016 | Guyana | 24%
|