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Table 2 Means and standard deviations for integrated exposure to illuminance and irradiance in the range 450–500 nm across the seasons

From: Annual variation in daily light exposure and circadian change of melatonin and cortisol concentrations at a northern latitude with large seasonal differences in photoperiod length

   Season
   Winter Spring Summer Autumn
Light exposure Mean (lux*min) 91,366 356,368 1,394,200 477,165
N = 15 SD (lux*min) 41,984 190,282 800,295 280,363
Light exposure 450–500 nm Mean (μW/cm2*min) 9919 31,153 114,027 38,846
N = 14 SD (μW/cm2*min) 9590 26,400 118,749 39,721