How would I end up knocking one over? Slim chance of that happening, it's not like I am moving them stoned out of my ass, or carrying two plants at a time. All that I do is move three plants one at a time for a distance of a mighty 15 ft! Haha, what an exercise. Yeah, as in you can't see anything. Haven't you ever heard of blackout curtains?mathieu............dont get me wrong.....i want more bud too but moving pots twice a day is going to be a pain in the ass your going to end up knockin one over ...........your dark room is in the same as light?? these curtains are going to keep out the light? like cant c your hand dark??