Table 1.
Exposure to blue, green and red artificial light at night on the seafloor of Plymouth Sound and the Tamar Estuary during clear (0–3 Okta) and cloudy (5–8 Okta) conditions.
| Waveband (nm) | Parameter | Cloud cover (Okta) | Irradiance (µW m−2) | ||
|---|---|---|---|---|---|
| Mean | Min | Max | |||
| 400–500 (Blue) | Eo(MHWS) | 0–3 | 0.89 | < 0.1 | 250.6 |
| 495–560 (Green) | Eo(MHWS) | 0–3 | 2.6 | < 0.1 | 453 |
| 620–740 nm (Red) | Eo(MHWS) | 0–3 | 0.4 | < 0.1 | 269.8 |
| 400–500 (Blue) | Eo(MLWS) | 0–3 | 3.2 | < 0.1 | 606.4 |
| 495–560 (Green) | Eo(MLWS) | 0–3 | 6.2 | < 0.1 | 872 |
| 620-740 nm (Red) | Eo(MLWS) | 0–3 | 3.6 | < 0.1 | 903.5 |
| 400–500 (Blue) | Eo(MHWS) | 5–8 | 1.8 | < 0.1 | 122.6 |
| 495–560 (Green) | Eo(MHWS) | 5–8 | 5.8 | < 0.1 | 349 |
| 620–740 nm (Red) | Eo(MHWS) | 5–8 | 1.3 | < 0.1 | 177.7 |
| 400–500 (Blue) | Eo(MLWS) | 5–8 | 6.1 | < 0.1 | 608.8 |
| 495–560 (Green) | Eo(MLWS) | 5–8 | 13.6 | < 0.1 | 957 |
| 620-740 nm (Red) | Eo(MLWS) | 5–8 | 8.8 | < 0.1 | 1,124.9 |
All values derived from radiative transfer models.
Eo scalar irradiance, MHWS mean high water spring tide, MLWS mean low water spring tide.