Hamish wrote: > mode 2 is cumulative energy / area, summed for the day sorry, sent that way too soon. still fairly murky, but 1 Wh . m-2 . day-1 = 3600J/m2 . 3600x24 sec-1 = J/m2 . 24sec-1 = 1/24 W/m2 = proportional to daily_sum(flux) ? (please send corrections) I would be interested in other folks' W/m2 -> µmol conversions. Hamish