ISO 17398: 2004 - establishes the classification of photoluminescent products according to their luminance properties.
Duration after removing the exciting light
| Luminance intensity (mcd/m2)
| Period of light decay
| 2 minutes | 10 minutes | 30 minutes | 60 minutes | Luminance intensity greater than a 0.32 mcd/m2 | ISO 17398 Clase C according to UNECE Regulation 107
| 690 | 140
| 45 | 20
| ---
| |
| 1035 | 215
| 70
| 30
| 3100
|
The method of measuring performance is according to ISO 17398: 2004 |