Table 2.
Increasing, long-dawn/dusk photoperiod applied to birds in the ILD treatment day 0 to 45.
| Growth day | Intensity (foot candles) | Transition (minutes) | Total hours of light | Cycle 1 |
|---|---|---|---|---|
| 0–7 | 4.3 (100%) | 0 | 23 | 0:00-0:00 |
| 8 | 2.5 (80%) | 30 | 16 | 6:00-22:00 |
| 9–11 | 1.9 (70%) | 30 | 16 | 6:00-22:00 |
| 12–15 | 1.2 (60%) | 30 | 16 | 6:00-22:00 |
| 16 | 0.52 (40%) | 30 | 16 | 6:00-22:00 |
| 17–21 | 0.52 (40%) | 30 | 16 | 6:00-22:00 |
| 22 | 0.49 (38%) | 30 | 18 | 6:00-24:00 |
| 23 | 0.44 (36%) | 30 | 18 | 6:00-24:00 |
| 24 | 0.39 (34%) | 30 | 18 | 6:00-24:00 |
| 25 | 0.35 (32%) | 30 | 18 | 6:00-24:00 |
| 26 | 0.31 (30%) | 30 | 18 | 6:00-24:00 |
| 27–32 | 0.23 (28%) | 30 | 18 | 6:00-24:00 |
| 33–45 | 0.23 (28%) | 30 | 20 | 6:00-02:00 |
Abbreviations: ILD, long-dawn/dusk photoperiod.