In the mating/control unit we must ensure

Confirm

See a clue in the article The ideal mating/early gestation barn: stalls, feeders, floor, light

Results

Correct answer

On an “ideal” farm, we should ensure 14-16 hours of light/day. Regarding the intensity, there are recommendations of 150-200 lux above the sows' eye level, but there are few scientific evidences in that regard.