AS/NZS 4282:2023
Table 3.2
Light technical parameter limits
The obtrusive light tool reads the vertical illuminance limit at a window, curfew or not, and the upward light ratio limit for the installation. It does not use the threshold increment.
Verified: read against the printed standard, pages 25. Checked 1 Oct 2026.
Units: Ev non curfew lx lx, Ev curfew lx lx, Ti max percent %, Lad cd M 2 cd/m², Ulr max ratio
These are the values AmpSize encodes. No text of the standard is reproduced. Verify against the current standard.
6 rows
| Zone | Ev non curfew lx | Ev curfew lx | Ti max percent (%) | Lad cd M 2 (cd/m²) | Ulr max (ratio) | Near zero | Lad sign note |
|---|---|---|---|---|---|---|---|
| A0 | 0 | 0 | — | — | 0 | yes | no |
| A1 | 2 | 0.1 | 20 | 0.1 | 0 | no | no |
| A2 | 5 | 1 | 20 | 0.2 | 0.01 | no | yes |
| A3 | 10 | 2 | 20 | 1 | 0.02 | no | no |
| A4 | 25 | 5 | 20 | 5 | 0.03 | no | no |
| TV | — | — | 20 | 10 | 0.08 | no | no |