| Parameter/Equipment | Range | Expanded Uncertainty of Measurement (+/-) |
| Illuminance Responsivity | 0.5 to 2 000) fc | 2.1 % of reading |
| (Illuminant A – CIE) | (5 to 21 527) lx | 2.1 % of reading |
| White Light Meters | (100 to 50 000) fl | 2.3 % of reading |
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| Spectral Irradiance | ||
| UV-A (315 to 400) nm | (100 to 20 000) µW/cm2 | 6.8 % of reading |
| Black Light Meters |