Table 1.

Means and standard deviations for annual integrated exposure to illuminance and irradiance in the range 450–500 nm during the six time periods of the day

		Time period of the day (hh:mm–hh:mm)
		04:00–08:00	08:00–12:00	12:00–16:00	16:00–20:00	20:00–24:00	00:00–04:00
Light exposure	Mean (lux*min)	27,654	91,945	196,408	246,982	16,621	166
N = 15	SD (lux*min)	15,922	46,024	121,967	124,183	19,830	305
Light exposure 450–500 nm	Mean (μW/cm2*min)	3166	8226	15,791	20,162	1122	20
N = 14	SD (μW/cm2*min)	3925	6742	15,143	20,966	1799	41