Mentioned in the article, too: Sitting in the shadow with sunglasses on a sunny day: >10000 lux, typical indoor/office: 500 lux. So, while much brighter than a

Mentioned in the article, too: Sitting in the shadow with sunglasses on a sunny day: >10000 lux, typical indoor/office: 500 lux. So, while much brighter than a candle, this can not be compared at all to sunlight.