My darkroom is in curtained-off area in garage. My wife made the curtain out of blackout clothe ( available at JoAnnes, etc where ever curtain material is sold). She sewed velcro on sides & used sticky type velcro for walls opposite. Put a board across top so don't get any light leaks above rod. Works great, even during daytime for my enlarger - dry area. Tried tubes for processing, but decided to do printing in evening or early morning in the wet area - remaining part of garage. Have a utility sink & built a cart for trays - shelves pull-out for staggering the trays.