going in there every once in a while with a flashlight to peak around isnt that big of a deal. light during the dark period will definitely cause hermies but not if youre just going in there maybe once or twice a week with a tiny bit of light like a flashlight. also, it depends on your strain. some strains will turn hermaphroditic very easily. you could always try moving your light schedule around so that the lights are on when you come home for a bit.