Table 2.
Photopic illuminance (lux), circadian light (CLA), circadian stimulus (CS) and melatonin suppression at T2 (after one-hour exposure) and at T3 (after two-hour exposure) for each of the experimental conditions.
| Experimental conditiona | Photopic illuminance (lux) | Circadian light CLAb | Circadian stimulus mean CSb | Mean±SEM melatonin suppression at T2 (%) | Mean±SEM melatonin suppression at T3 (%) |
|---|---|---|---|---|---|
| Blue Light Goggles | 40 | 619 | 0.45 | 32±0.05 | 51±0.04 |
| Night Shift High CCT (5997 K) | 69.6±31.4 | 93.5±29.4 | 0.13±0.04 | 15±0.05 | 19±0.05 |
| Night Shift Low CCT (2837 K) | 71.4±52.9 | 56.9±23.9 | 0.08±0.03 | 8±0.03 | 12±0.03 |
| Orange Goggles (control) | <5 | <1.0 | 0.00 | NA | NA |
a
Stimulus reported for Blue Light Goggles intervention was calibrated and measured prior to each experimental session. Photopic illuminances reported for the Night Shift interventions are the mean±SEM values recorded by the Dimesimeter over the duration of exposure. The CLA and CS values reported for both Night Shift interventions are mean±SEM. Photopic illuminance for the Orange Goggles condition was measured using an illuminance meter during the experiment.