I wouldn't necessarily assume so, and neither does TFA: >According to researchers at the University of Missouri, people who develop this condition are also thr

I wouldn't necessarily assume so, and neither does TFA: >According to researchers at the University of Missouri, people who develop this condition are also three times more likely to be involved in a vehicle accident. They don't mention lack of light, but instead associate the higher crash rate with sleep disorders brought on by consistently working graveyard shifts.