With recent developments in Codes and Standards for Photoluminescent Safety Products and in line with the recognized industry development it is now considered necessary to extend the PSPA material classification systems as follows:
| Luminance mcd/m2 | 2 mins | 10 mins | 30 mins | 60 mins |
|---|---|---|---|---|
| Class A | 108 | 25 | 7 | 3 |
| Class B | 210 | 50 | 15 | 7 |
| Class C | 690 | 140 | 45 | 20 |
| Class D | 1100 | 260 | 85 | 35 |
| Class E | 1800 | 400 | 120 | 55 |
| Class F | 2300 | 520 | 155 | 70 |
| Class G | 3000 | 650 | 190 | 80 |
The PSPA classification system is based on luminance decay data as given when tested according to ISO 17398 (also ISO 16069) illuminated with 1000 lux from Xenon D75 (Daylight) source for 5 minutes (very similar to DIN 67510 Part 1 and ASTM E 2073-10 also with this illumination and time.
