Growrooms require some specialized equipment. Thinking about lights, fans, and nutrients can often cause one of the most important dark room tool to be overlooked- Duct Tape. Duct tape has so many uses it should be a considered a grow room standard.
Use duct tape to attach mylar sheeting to grow space walls or to tape cardboard over light leaks. Use it cover cables or to attach silencers to fans. Duct tape can be used to secure tarps or to make labels for bottles, plants, and switches. A long strip of duct tape will seam seams and secure folds, reducing light and air leaks. You can also use it to secure ducts.