40 CFR Part 53, Table E-2
Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
| Characteristic | Spectral Region |
|---|---|
| Ultraviolet | Visible | Infrared |
| Bandwidth (µm) | 0.28 to 0.32 0.32 to 0.40 | 0.40 to 0.78 | 0.78 to 3.00 |
| Irradiance (W/m2) | 5 56 | 450 to 550 | 439 |
| Allowed Tolerance | ±35% ±25% | ±10% | ±10% |
[62 FR 38799, July 18, 1997; 63 FR 7714, Feb. 17, 1998]