Yeah, a few hours or even a day in the dark won't hurt them at all but definitely get your gear put away and preferably out of the home. Appraisals usually only look at the very basics of the property and rarely go into closets or even most of the rooms...sometimes they just cruise by and check from the road too! But still you don't want to take the chance...besides, it'll give you a chance to clean out the grow area and make it nice and organized for their return.